An element automatic separation and purification system based on hydraulic drive

Abstract

The application discloses an element automatic separation and purification system based on hydraulic driving, and belongs to the technical field of element / isotope pretreatment equipment. The element automatic separation and purification system arranges a driving unit and a leaching unit on an experimental platform framework. The driving unit drives a lifting plate to ascend and descend on the experimental platform framework through a hydraulic cylinder, and simultaneously takes a hydraulic power system as a hydraulic source of the hydraulic cylinder. In each syringe of the leaching unit, a needle cylinder is fixed on the experimental platform framework, upper ends of piston core rods are fixed on the lifting plate, and front ports are communicated with upper ends of leaching holes arranged in corresponding dispensers and a leaching liquid source through pipelines. The element automatic separation and purification system can remotely control the leaching unit, realizes element automatic separation and purification, and ingeniously avoids the defect that metal components are necessarily introduced into an experimental environment when automation is realized. In addition, the element automatic separation and purification system can synchronously complete separation and purification of different elements, and has the characteristics of low process blank and unlimited expansion.

Description

Technical Field

[0001] This invention relates to the field of element / isotope pretreatment equipment technology, and in particular to an automatic element separation and purification system based on hydraulic drive. Background Technology

[0002] To achieve accurate isotope analysis, it is typically necessary to separate and purify the target element from the matrix and interfering elements. Traditional column chromatography is a commonly used separation method, but it generally requires highly specialized and well-trained laboratory personnel, is slow and labor-intensive, limiting sample processing efficiency and making it difficult to meet the needs of large-scale sample analysis in medical testing and other scenarios. Furthermore, column chromatography procedures generally involve high concentrations of acid, which can volatilize in the open column environment, seriously endangering the health of laboratory personnel. These drawbacks hinder the application of elemental analysis techniques in fields such as medical diagnostics and real-time environmental monitoring. Therefore, there is an urgent need to develop automated elemental separation and enrichment systems with data accuracy comparable to traditional column chromatography methods, capable of meeting the requirements of large sample volumes in certain projects.

[0003] In recent years, a series of automated column chromatography separation methods have been reported. Based on the method of adding the eluent, these methods can be mainly divided into three categories: using syringe pumps or peristaltic pumps to drive the eluent, gas pressure driving, and gravity driving. However, these methods still have certain shortcomings. While using syringe pumps or flow pumps allows for relatively precise control of the eluent flow rate, different samples require the same flow path for the eluent. Channel cleaning and eluent replacement further complicate the process, and using multiple pump systems leads to high equipment costs. Furthermore, these pumps inevitably contain metal components, which are easily corroded by the acidic environment, potentially increasing process blanks and shortening the equipment's lifespan. To avoid the problems associated with metal components in the pump power system, some researchers have proposed using gas pressure driving of the eluent. For example, in 2013, TJIreland et al. designed a Teflon high-performance liquid chromatography method that uses N2 pressure to drive the liquid into the column. However, under gas pressure, it is difficult to precisely control the liquid flow rate and volume, and there is also the problem of potentially introducing air bubbles that could block the liquid flow path. Patent CN111643928A discloses an automated solid-phase extraction device that uses a siphon effect to drive the eluent into the chromatographic column and uses an infrared droplet counter to control quantification. However, it also suffers from the problem of acid volatilization corroding the motor and integrated circuit components, which greatly reduces the stability of the device and limits its practical application. Summary of the Invention

[0004] One of the objectives of this invention is to provide an automated element separation and purification system based on hydraulic drive, which addresses the current state of existing technology. This system allows for remote control of the rinsing unit, achieving not only automated element separation and purification but also cleverly avoiding the drawback of introducing metal components into the experimental environment as a necessary step in automation.

[0005] The second objective of this invention is to provide an automated element separation and purification system based on hydraulic drive, which can simultaneously complete the separation and purification of different elements and features low process blank and unlimited scalability, in response to the existing technical status.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An automated element separation and purification system based on hydraulic drive includes an experimental platform frame, a drive unit, and a rinsing unit.

[0008] The drive unit includes a lifting plate, a hydraulic cylinder, and a hydraulic power system, wherein:

[0009] The lifting plate can be slidably mounted on the experimental platform frame. The hydraulic cylinder is fixedly mounted on the experimental platform frame and its piston rod is connected to the lifting plate. The hydraulic power system is connected to the cylinder body of the hydraulic cylinder through a pipeline.

[0010] The rinsing unit includes a dispenser and at least one syringe, wherein:

[0011] The dispenser is fixedly mounted on the experimental platform frame. The dispenser has rinsing holes that match the number of syringes, and the rinsing holes are through holes that penetrate the dispenser.

[0012] Each syringe's syringe barrel is fixed to the experimental platform frame, and the upper end of each syringe's piston rod is fixed to the lifting plate. The front port of each syringe is connected to the upper end of the rinsing hole in the corresponding dispenser through a pipe, and the pipe is equipped with a first one-way valve. The flow direction of the first one-way valve is from the rinsing hole to the syringe. A three-way connector is also connected to the pipe between the syringe and the first one-way valve. The first and second ports of the three-way connector are connected to the pipe between the syringe and the first one-way valve. The third port of the three-way connector is connected to the rinsing liquid source through a pipe, and the pipe is equipped with a second one-way valve. The flow direction of the second one-way valve is from the third port of the three-way connector to the rinsing liquid source.

[0013] The experimental platform frame, the lifting plate and hydraulic cylinder in the drive unit, the distributor and syringe in the rinsing unit, and all pipes are non-metallic components.

[0014] Furthermore, the experimental platform frame is equipped with a lifting limit plate, which is located above the lifting plate. The hydraulic power system is also equipped with a pressure sensor connected to its pipeline. The pressure sensor is used to detect the pressure signal in the pipeline of the hydraulic power system, which serves as the start-stop control signal for the hydraulic power system.

[0015] Furthermore, the dispenser is provided with a number of inlet holes matching the number of syringes, and the inlet holes are blind holes that do not penetrate the dispenser. The dispenser is also provided with a liquid supply channel, and each inlet hole is connected to the liquid supply channel. The third interface of the three-way connector is connected to the inlet hole through a pipe, and the liquid supply channel is connected to the rinsing liquid source.

[0016] Furthermore, the hydraulic cylinder includes a first hydraulic cylinder and a second hydraulic cylinder. The first hydraulic cylinder and the second hydraulic cylinder are fixed on the experimental platform frame at the same reference height, and the piston rods of the two are respectively connected to both ends of the lifting plate. The piston rods of the first hydraulic cylinder and the second hydraulic cylinder extend and retract within their respective cylinder bodies to drive the lifting plate to rise and fall on the experimental platform frame.

[0017] Furthermore, the hydraulic power system includes a reservoir, a first metering pump, and a second metering pump. The reservoir, the first metering pump, and the first chamber of the first hydraulic cylinder are connected by a pipeline, and a first solenoid valve is installed on the pipeline. The reservoir, the second metering pump, and the second chamber of the second hydraulic cylinder are connected by a pipeline, and a second solenoid valve is installed on the pipeline. The second chamber of the first hydraulic cylinder is connected to the first chamber of the second hydraulic cylinder by a pipeline. The system also includes a third solenoid valve and a fourth solenoid valve. The third solenoid valve is connected in parallel with the first metering pump and the first solenoid valve through a pipeline. The fourth solenoid valve is connected in parallel with the second metering pump and the second solenoid valve through a pipeline.

[0018] Furthermore, the hydraulic oil stored in the reservoir is polyethylene glycol or water.

[0019] Furthermore, the side of the lifting plate is provided with a T-shaped groove that is adapted to the piston rod of the syringe.

[0020] Furthermore, the syringe barrel is fixed to the experimental platform frame by a clamp, the clamp comprising two clamping and locking plates, and the syringe barrel is locked between the two plates.

[0021] Furthermore, the experimental platform frame includes a base plate and a support plate fixed to the base plate by uprights. The support plate has mounting holes that penetrate the support plate, and the distributor is fixed in the mounting holes. The lifting plate and the hydraulic cylinder are both set on the support plate.

[0022] Furthermore, the hydraulic power system is encapsulated in a chassis.

[0023] The beneficial effects of this invention are as follows:

[0024] Compared to existing technologies, its hydraulically driven automatic element separation and purification system arranges a drive unit and a rinsing unit on the experimental platform frame. The drive unit uses a hydraulic cylinder to drive the lifting plate to move up and down on the experimental platform frame, while using a hydraulic power system as the hydraulic source for the hydraulic cylinder. In each syringe of the rinsing unit, the syringe barrel is fixed on the experimental platform frame, the upper end of the piston rod is fixed on the lifting plate, and the front port is connected to the upper end of the rinsing hole in the corresponding dispenser and the rinsing liquid source through a pipe.

[0025] According to the above design, the hydraulic cylinder is controlled by the hydraulic power system of the drive unit, which in turn drives the lifting plate to rise and fall. This allows for remote control of the rinsing unit, adding rinsing solution to the syringe and injecting the rinsing solution into the ion exchange column. This not only achieves automatic element separation and purification but also cleverly avoids the drawback of introducing metal components into the experimental environment that automating the process. By expanding the module consisting of the lifting plate and hydraulic cylinder of the rinsing unit and the drive unit, while retaining the hydraulic power system of the drive unit, and adapting it to the rinsing solution source required for the experiment, the separation and purification of different elements can be completed simultaneously. This avoids the problem of contamination between different rinsing solutions and features low process blank and unlimited scalability. It can meet the experimental requirements of various laboratories as well as the needs of hospitals for processing large sample volumes such as serum samples, truly achieving savings in time, space, and labor. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of an automatic element separation and purification system based on hydraulic drive according to the present invention (the hydraulic power system and various pipelines are omitted in the figure);

[0027] Figure 2 This is a schematic diagram of the distributor in an automated element separation and purification system based on hydraulic drive according to the present invention.

[0028] Figure 3 This is a schematic diagram of the working principle of the drive unit in an automatic element separation and purification system based on hydraulic drive according to the present invention (the hydraulic power system drives the lifting plate to rise in height on the experimental platform frame);

[0029] Figure 4 This is a schematic diagram of the working principle of the drive unit in an automatic element separation and purification system based on hydraulic drive according to the present invention (the hydraulic power system drives the lifting plate to lower on the experimental platform frame);

[0030] Figure 5 This is a schematic diagram of the working principle of the elution unit in an automatic element separation and purification system based on hydraulic drive according to the present invention (the syringe draws elution liquid from the elution liquid source);

[0031] Figure 6This is a schematic diagram of the working principle of the elution unit in an automated element separation and purification system based on hydraulic drive according to the present invention (the syringe injects the elution solution into the ion exchange column).

[0032] Labeling instructions: 1. Base plate, 2. Upright pole, 3. Support plate, 4. First hydraulic cylinder, 5. Lifting plate, 5-1. T-slot, 6. Clamping plate, 7. Second hydraulic cylinder, 8. Injector, 9. Distributor, 9-1. Rinse hole, 9-2. Liquid inlet hole, 9-3. Liquid inlet channel, 10. Liquid reservoir, 11. First metering pump, 12. Second metering pump, 13. First solenoid valve, 14. Second solenoid valve, 15. Third solenoid valve, 16. Fourth solenoid valve, 17. First check valve, 18. Second check valve, 19. T-connector, 20. Limiting plate. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific examples described herein are merely illustrative and not intended to limit the scope of the invention.

[0034] Example 1:

[0035] Please see Figures 1-6 As shown, an automated element separation and purification system based on hydraulic drive includes an experimental platform frame, a drive unit, and a rinsing unit.

[0036] The drive unit includes a lifting plate 5, a hydraulic cylinder, and a hydraulic power system, wherein:

[0037] The lifting plate 5 can be slidably mounted on the experimental platform frame. The hydraulic cylinder is fixedly mounted on the experimental platform frame and its piston rod is connected to the lifting plate 5 to drive the lifting plate to rise and fall on the experimental platform frame. The hydraulic power system is connected to the cylinder body of the hydraulic cylinder through a pipeline, serving as the hydraulic source for the hydraulic cylinder.

[0038] Specifically, the hydraulic cylinder design in the drive unit is as follows:

[0039] The hydraulic cylinder includes a first hydraulic cylinder 4 and a second hydraulic cylinder 7. The first hydraulic cylinder 4 and the second hydraulic cylinder 7 are fixed on the experimental platform frame at the same reference height, and the piston rods of the two are respectively connected to the two ends of the lifting plate 5. The piston rods of the first hydraulic cylinder 4 and the second hydraulic cylinder 7 extend and retract within their respective cylinder bodies to drive the lifting plate 5 to rise and fall on the experimental platform frame.

[0040] Specifically, the hydraulic power system design in the drive unit is as follows:

[0041] The hydraulic power system includes a reservoir 10, a first metering pump 11, and a second metering pump 12. The hydraulic oil stored in the reservoir 10 is polyethylene glycol or water. The reservoir 10, the first metering pump 11, and the first chamber of the first hydraulic cylinder 4 are connected by a pipeline, and a first solenoid valve 13 is provided on the pipeline. The second chamber of the reservoir 10, the second metering pump 12, and the second hydraulic cylinder 7 are connected by a pipeline, and a second solenoid valve 14 is provided on the pipeline. The second chamber of the first hydraulic cylinder 4 is connected to the first chamber of the second hydraulic cylinder 7 by a pipeline. The system also includes a third solenoid valve 15 and a fourth solenoid valve 16. The third solenoid valve 15 is connected in parallel with the first metering pump 11 and the first solenoid valve 13 through a pipeline. The fourth solenoid valve 16 is connected in parallel with the second metering pump 12 and the second solenoid valve 14 through a pipeline.

[0042] The process of lifting plate 5 on the experimental platform frame using a hydraulic power system is as follows:

[0043] like Figure 3 The first metering pump 11, the first solenoid valve 13 and the fourth solenoid valve 16 are all closed, and the second metering pump 12, the second solenoid valve 14 and the third solenoid valve 15 are all open. At this time, the hydraulic power system drives the lifting plate 5 to rise on the experimental platform frame. The arrow in the figure indicates the flow direction of the hydraulic oil.

[0044] like Figure 4 When the first metering pump 11, the first solenoid valve 13, and the fourth solenoid valve 16 are all open, the second metering pump 12, the second solenoid valve 14, and the third solenoid valve 15 are all closed, the hydraulic power system drives the lifting plate 5 to lower on the experimental platform frame. The arrow in the figure indicates the flow direction of the hydraulic oil.

[0045] Preferably, the hydraulic power system is enclosed in a chassis to achieve spatial isolation from the experimental environment, thereby reducing the impact of the experimental environment on the hydraulic power system. Furthermore, the hydraulic power system is located away from the experimental environment (the location of the rinsing unit). It should be noted that the chassis should possess good corrosion resistance, sealing, and waterproofing, with a rating of IP67 or higher.

[0046] The rinsing unit includes a dispenser 9 and at least one syringe 8, wherein:

[0047] The dispenser 9 is fixedly mounted on the experimental platform frame. The dispenser 9 has rinsing holes 9-1 that match the number of syringes 8, and the rinsing holes 9-1 are through holes that penetrate the dispenser 9.

[0048] Each syringe 8 has its syringe barrel fixed to the experimental platform frame. The upper end of the piston rod of each syringe 8 is fixed to the lifting plate 5. The front port of each syringe 8 is connected to the upper end of the rinsing hole 9-1 in the corresponding dispenser 9 through a pipe, and a first one-way valve 17 is provided on the pipe. The flow direction of the first one-way valve 17 is from the rinsing hole 9-1 to the syringe 8. A three-way connector 19 is also connected to the pipe between the syringe 8 and the first one-way valve 17. The first and second ports of the three-way connector 19 are connected to the pipe between the syringe 8 and the first one-way valve 17. The third port of the three-way connector 19 is connected to the rinsing liquid source through a pipe, and a second one-way valve 18 is provided on the pipe. The flow direction of the second one-way valve 18 is from the third port of the three-way connector 19 to the rinsing liquid source.

[0049] Preferably, the dispenser 9 has a number of inlet holes 9-2 that match the number of syringes 8, and the inlet holes 9-2 are blind holes that do not penetrate the dispenser 9. The dispenser 9 also has a liquid supply channel 9-3, and each inlet hole is connected to the liquid supply channel 9-3. The third interface of the tee connector 19 is connected to the inlet hole 9-2 through a pipe, and the liquid supply channel 9-3 is connected to the rinsing liquid source.

[0050] When conducting elemental separation and purification experiments, the ion exchange column is placed below the distributor 9, and then a receiving cup or waste liquid tank is placed below the ion exchange column. The lifting plate 5 is driven by a hydraulic power system to move up and down on the experimental platform frame. The working process of the syringe 8 is as follows:

[0051] like Figure 5 When the hydraulic power system drives the lifting plate 5 to rise in the experimental platform frame, the syringe 8 draws rinsing liquid from the rinsing liquid source through the inlet channel 9-3, the inlet hole 9-2, and the second one-way valve 18 in sequence. The arrow in the figure indicates the flow direction of the rinsing liquid.

[0052] like Figure 6 When the hydraulic power system drives the lifting plate 5 to lower on the experimental platform frame, the syringe 8 injects the eluent into the ion exchange column through the first one-way valve 17 and the eluent hole 9-1 in sequence. The arrow in the figure indicates the flow direction of the eluent.

[0053] More specifically, in the above technical solution, the experimental platform frame, the lifting plate 5 in the drive unit, and the syringe 8 in the rinsing unit are designed as follows:

[0054] The experimental platform frame includes a base plate 1 and a support plate 3 fixed to the base plate 1 by uprights 2. The support plate 3 is provided with mounting holes that penetrate the support plate 3. The distributor 9 is fixed in the mounting holes. The lifting plate 5 and the hydraulic cylinder are both set on the support plate 3.

[0055] The side of the lifting plate 5 is provided with a T-shaped groove 5-1 that matches the piston rod of the syringe 8, so as to fix the upper end of the piston rod of the syringe 8 onto the lifting plate 5.

[0056] The syringe 8 is fixed to the experimental platform frame by a clamp 6, which includes two clamping and locking plates, and the syringe 8 is locked between the two plates.

[0057] In this embodiment, the experimental platform frame, the lifting plate 5 and hydraulic cylinder in the drive unit, the distributor 9 and syringe 8 in the rinsing unit, and all pipes are non-metallic components. For example, the cylinder body of the hydraulic cylinder is made of general corrosion-resistant plastic, and its piston rod is a non-metallic component; the distributor 9 is made of polytetrafluoroethylene; the syringe 8 does not contain latex rubber material inside, making it more resistant to chemical corrosion; the first check valve 17 and the second check valve 18 are both made of corrosion-resistant materials; and all pipes are made of PFA material or other materials with good corrosion resistance.

[0058] Example 2:

[0059] Please see Figure 1 As shown, based on Example 1, in order to quantitatively add rinsing fluid to the syringe 8, a limit plate 20 is provided on the experimental platform frame that can be raised and lowered, and the limit plate 20 is located above the lifting plate 5. The hydraulic power system is also provided with a pressure sensor (not shown in the figure) connected to its pipeline. The pressure sensor is used to detect the pressure signal in the pipeline of the hydraulic power system as the start and stop control signal of the hydraulic power system.

[0060] When the lifting plate 5 rises to a point where it touches the limit plate 20, it can no longer rise. At this point, the pressure in the hydraulic power system's pipeline will increase. When the pressure sensor detects this change, the hydraulic power system stops supplying fluid, thereby controlling the maximum height of the lifting plate 5 and quantitatively adding eluent to the syringe 8. In other words, adjusting the height of the limit plate 20 adjusts the amount of eluent added to the syringe 8 in a single operation.

[0061] In summary, this invention arranges a drive unit and a rinsing unit on an experimental platform frame. The drive unit uses a hydraulic cylinder to move the lifting plate 5 up and down on the experimental platform frame, while a hydraulic power system serves as the hydraulic source for the hydraulic cylinder. In each syringe 8 of the rinsing unit, the syringe barrel is fixed to the experimental platform frame, the upper end of the piston rod is fixed to the lifting plate 5, and the front port is connected to the upper end of the rinsing hole 9-1 in the corresponding dispenser 9 and the rinsing liquid source via a pipe. The advantages of using this automatic element separation and purification system for element separation and purification experiments are as follows:

[0062] By controlling the hydraulic cylinder through the hydraulic power system of the drive unit, the lifting plate 5 can be raised and lowered, thus remotely controlling the rinsing unit, adding rinsing solution to the syringe 8 and injecting the rinsing solution into the ion exchange column. This not only achieves automatic separation and purification of elements, but also cleverly avoids the defect that automation inevitably introduces metal parts into the experimental environment.

[0063] The module, consisting of the lifting plate 5 of the extended rinsing unit and the drive unit, and the hydraulic cylinder, retains the hydraulic power system of the drive unit and is adapted to the rinsing liquid source required for the experiment. It can simultaneously complete the separation and purification of different elements, avoiding the contamination problem between different rinsing liquids. It has the characteristics of low process blank and unlimited expansion, which can meet the experimental requirements of various laboratories and the needs of hospitals to process large sample volumes such as serum samples, truly achieving the saving of time, space and labor.

[0064] This invention is not limited to the specific embodiments described above. Those skilled in the art can implement this invention using various other specific embodiments based on the content disclosed herein. Therefore, any design that adopts the design structure and concept of this invention and makes some simple changes or modifications falls within the scope of protection of this invention.

Claims

1. An automated element separation and purification system based on hydraulic drive, characterized in that: This includes the experimental platform framework, as well as the drive unit and the rinsing unit; The drive unit includes a lifting plate, a hydraulic cylinder, and a hydraulic power system, wherein: The lifting plate can be slidably mounted on the experimental platform frame. The hydraulic cylinder is fixedly mounted on the experimental platform frame and its piston rod is connected to the lifting plate. The hydraulic power system is connected to the cylinder body of the hydraulic cylinder through a pipeline. The rinsing unit includes a dispenser and at least one syringe, wherein: The dispenser is fixedly mounted on the experimental platform frame. The dispenser has rinsing holes that match the number of syringes, and the rinsing holes are through holes that penetrate the dispenser. Each syringe's syringe barrel is fixed to the experimental platform frame, and the upper end of each syringe's piston rod is fixed to the lifting plate. The front port of each syringe is connected to the upper end of the rinsing hole in the corresponding dispenser through a pipe, and the pipe is equipped with a first one-way valve. The flow direction of the first one-way valve is from the rinsing hole to the syringe. A three-way connector is also connected to the pipe between the syringe and the first one-way valve. The first and second ports of the three-way connector are connected to the pipe between the syringe and the first one-way valve. The third port of the three-way connector is connected to the rinsing liquid source through a pipe, and the pipe is equipped with a second one-way valve. The flow direction of the second one-way valve is from the third port of the three-way connector to the rinsing liquid source. The experimental platform frame, the lifting plate and hydraulic cylinder in the drive unit, the distributor and syringe in the rinsing unit, and all pipes are non-metallic components. The experimental platform frame is equipped with a lifting limit plate, which is located above the lifting plate. The hydraulic power system is also equipped with a pressure sensor connected to its pipeline. The pressure sensor is used to detect the pressure signal in the pipeline of the hydraulic power system, which serves as the start and stop control signal of the hydraulic power system. The dispenser has a number of inlet holes matching the number of syringes, and the inlet holes are blind holes that do not penetrate the dispenser. The dispenser also has a liquid supply channel. Each inlet hole is connected to the liquid supply channel. The third interface of the three-way connector is connected to the inlet hole through a pipe. The liquid supply channel is connected to the rinsing liquid source. The hydraulic cylinder includes a first hydraulic cylinder and a second hydraulic cylinder. The first hydraulic cylinder and the second hydraulic cylinder are fixed on the experimental platform frame at the same reference height, and the piston rods of the two are respectively connected to the two ends of the lifting plate. The piston rods of the first hydraulic cylinder and the second hydraulic cylinder extend and retract within their respective cylinder bodies to drive the lifting plate to rise and fall on the experimental platform frame. The hydraulic power system includes a reservoir, a first metering pump, and a second metering pump. The reservoir, the first metering pump, and the first chamber of the first hydraulic cylinder are connected by a pipeline, and a first solenoid valve is installed on the pipeline. The reservoir, the second metering pump, and the second chamber of the second hydraulic cylinder are connected by a pipeline, and a second solenoid valve is installed on the pipeline. The second chamber of the first hydraulic cylinder is connected to the first chamber of the second hydraulic cylinder by a pipeline. The system also includes a third solenoid valve and a fourth solenoid valve. The third solenoid valve is connected in parallel with the first metering pump and the first solenoid valve through a pipeline. The fourth solenoid valve is connected in parallel with the second metering pump and the second solenoid valve through a pipeline.

2. The hydraulically driven automatic element separation and purification system according to claim 1, characterized in that: The hydraulic oil stored in the reservoir is either polyethylene glycol or water.

3. The hydraulically driven automatic element separation and purification system according to claim 1, characterized in that: The side of the lifting plate is provided with a T-shaped groove that is adapted to the piston rod of the syringe.

4. The hydraulically driven automatic element separation and purification system according to claim 1, characterized in that: The syringe barrel is fixed to the experimental platform frame by a clamp, which includes two clamping and locking plates, and the syringe barrel is locked between the two plates.

5. The hydraulically driven automatic element separation and purification system according to claim 1, characterized in that: The experimental platform frame includes a base plate and a support plate fixed to the base plate by uprights. The support plate has mounting holes that penetrate the support plate, and the distributor is fixed in the mounting holes. The lifting plate and the hydraulic cylinder are both set on the support plate.

6. An automatic element separation and purification system based on hydraulic drive according to any one of claims 1 to 5, characterized in that: The hydraulic power system is enclosed in a chassis.

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