Online sampling and detection device with split-flow structure

Abstract

The utility model discloses an online sampling detection device with shunt structure, which comprises a sampling flow path, a shunt structure, a detection cell, a monomer content detection module, a microfluidic pretreatment structure, an element detection module and a data processor. The sampling flow path obtains a sample to be measured from the material in a formula pool, and the shunt structure divides the sample into a first sample stream and a second sample stream. The first sample stream flows through the detection cell, and the monomer content detection module arranged on one side of the detection cell detects the monomer residual information of the first sample stream. The second sample stream passes through the microfluidic pretreatment structure to be diluted and mixed online to form a liquid to be measured, and the element detection module detects the element impurity information of the liquid to be measured. The data processor generates a quality detection result, thereby realizing a parallel double detection flow path, improving the detection speed, achieving graded reuse and batch tracing, and achieving other purposes.

Description

Technical Field

[0001] This utility model relates to a detection device, and more particularly to an online sampling and detection device with a diversion structure. Background Technology

[0002] Polyacrylate emulsions, as key binder raw materials for lithium-ion battery separators, play a crucial role in the structural stability and mechanical properties of the separator. Their polymer chains not only enhance the bonding force between the ceramic coating and the separator substrate but also inhibit thermal shrinkage of the separator at high temperatures, thereby improving thermal stability and resistance to mechanical damage. However, the unpolymerized acrylic monomers remaining in the emulsion are volatile and irritating, potentially posing risks to operational safety and the environment. Furthermore, they may participate in adverse electrochemical reactions within the battery, such as self-polymerization or reaction with the electrolyte to generate gases and impurities, leading to increased internal resistance, shortened cycle life, and even thermal runaway. Simultaneously, impurities such as sodium, potassium, calcium, and iron can affect coating uniformity and electrical performance.

[0003] However, existing methods for detecting emulsions have the following drawbacks: First, it relies heavily on manual offline sampling and analysis in laboratories, requiring cumbersome pretreatment such as organic solvent precipitation and extraction before chromatographic analysis. This results in long detection cycles, complex operations, and poor repeatability, making it difficult to meet the needs of large-scale online detection. Second, some online monitoring devices only insert a single optical probe into the reaction vessel, such as a near-infrared or Raman probe. They can only obtain single property information of the latex and cannot simultaneously quantify monomer residues and elemental impurities, resulting in a single detection dimension. Third, sampling from a single location is insufficient to represent the emulsion state at different locations within the formulation pool, resulting in inadequate sample representativeness and biased test results. Fourth, the detection of organic components and elemental analysis usually involve different instruments and processes. Samples need to be sampled and pretreated separately. The devices are scattered and have low integration. Furthermore, the sample state may change between two samplings, affecting the consistency and comparability of the data.

[0004] Fifth, existing testing devices, after obtaining test results, mostly only display numerical values ​​or issue alarms for exceeding limits. They fail to perform subsequent sorting and processing of the samples to be tested based on the test results, resulting in a disconnect between the test results and the raw material processing flow of the production line. It is still necessary to manually interpret the test report and then manually dispatch the material source, which is not only time-consuming and labor-intensive, but also not conducive to the recycling of samples for graded storage and reuse according to their quality level.

[0005] VI. The performance of recycled emulsions fluctuates greatly due to historical usage and pretreatment processes. Therefore, there is a need for an online detection method that can quickly assess the usability of incoming and recycled emulsions using a unified flow path and unified detection conditions, so that the detection data of the two can be directly compared to ensure the consistency between incoming and recycled emulsions.

[0006] Based on the above problems, it is necessary to provide a method that can perform online sampling and simultaneously detect monomer residues and elemental impurities in the same sample after splitting, so as to produce high-precision quality test results. This would solve the problems of single detection dimensions, insufficient sample representativeness, scattered devices, poor data consistency, and disconnect between test results and raw material processing procedures in existing technologies. Utility Model Content

[0007] The purpose of this invention is to provide an online sampling and detection device with a flow-splitting structure. The flow-splitting structure divides the same sample to be tested obtained online from the formulation pool into two paths. One path flows through the detection pool and the monomer content detection module detects the monomer residue information. The other path is diluted and mixed online by a microfluidic pretreatment structure and then the element detection module detects the elemental impurity information. Thus, the monomer residue and elemental impurity information of the same sample are obtained at the same time with parallel dual detection flow paths, thereby increasing the detection dimensions and improving the detection accuracy.

[0008] To achieve the above objectives, this utility model provides an online sampling and detection device with a diversion structure, comprising: A sampling flow path is used to connect to a formulation pool to obtain a sample to be tested from a material in the formulation pool; A flow splitting structure is connected to the sampling flow path and is provided with a first flow splitting port and a second flow splitting port for splitting the sample to be tested into a first sample stream and a second sample stream. A detection cell, one end of which is connected to the first diversion port, so that the first sample flow passes through the detection cell; A monomer content detection module is disposed on one side of the detection cell and is used to detect the monomer residue information of the first sample stream; A microfluidic pretreatment structure is connected to the second split port for online dilution and mixing of the second sample stream to form a test solution; An element detection module, connected to the microfluidic pretreatment structure, is used to detect elemental impurities in the test liquid; and A data processor is electrically connected to the monomer content detection module and the element detection module, respectively, and is used to generate a quality detection result of the sample to be tested based on the monomer residue information and the element impurity information.

[0009] Preferably, it further includes a monomer component detection module, which is disposed on one side of the detection cell and electrically connected to the data processor. The monomer component detection module includes a quantitative injection valve and a liquid chromatography unit. When the monomer residual information exceeds a preset threshold, the data processor drives the quantitative injection valve to open, so that the first sample stream flowing through the detection cell enters the liquid chromatography unit for separation and analysis to obtain monomer component information, so that the data processor can correct the quality detection result based on the monomer component information.

[0010] Preferably, it further includes a grading device electrically connected to the data processor. The grading device includes a grading valve and multiple storage tanks. The grading valve is used to communicate with the formula pool and has multiple discharge channels. Each of the storage tanks is respectively connected to each of the discharge channels. The data processor drives the grading valve to open the corresponding discharge channel according to the quality detection result, so as to output the material in the formula pool to the corresponding storage tank.

[0011] Preferably, it includes a multi-point sampling device, which has multiple sampling ports distributed at different locations in the formulation pool and multiple sampling branches connecting each of the sampling ports, and the sampling branches converge and connect to the sampling flow path.

[0012] Preferably, a sampling switching valve is included, connected between each of the sampling branches and the sampling flow path, and electrically connected to the data processor, for selectively or sequentially activating each of the sampling branches.

[0013] Preferably, the sampling flow path is provided with a delivery pump and a filter element, the filter element being located between the delivery pump and the flow splitting structure, for filtering out a solid particle in the sample to be tested.

[0014] Preferably, the flow splitting structure is a proportional flow splitting valve electrically connected to the data processor, used to adjust the flow splitting ratio between the first sample stream and the second sample stream.

[0015] Preferably, the monomer content detection module includes a Fourier transform infrared spectroscopy unit, a dispersive infrared spectroscopy unit, or a near-infrared spectroscopy unit.

[0016] Preferably, the microfluidic pretreatment structure includes a dilution channel and a mixing channel. One end of the dilution channel is provided with a sample inlet and a diluent inlet. The sample inlet is connected to the second split port. The diluent inlet is used to introduce a diluent. One end of the mixing channel is connected to the other end of the dilution channel, and the other end of the mixing channel is provided with a test liquid outlet, so that the test liquid is output through the test liquid outlet.

[0017] Preferably, the microfluidic pretreatment structure is a microfluidic chip, and the dilution channel and the mixing channel are formed within the microfluidic chip.

[0018] Preferably, the system further includes a diluent storage tank and a metering pump. The diluent storage tank is connected to the diluent inlet via the metering pump. The metering pump is electrically connected to the data processor and is used to adjust the flow rate of the diluent input to the diluent inlet, so that the second sample stream is mixed with the diluent at a set dilution ratio.

[0019] Preferably, the element detection module includes an inductively coupled plasma emission spectroscopy unit.

[0020] Preferably, a temperature control is included, disposed on one side of the detection cell and electrically connected to the data processor, for maintaining the temperature of the first sample stream within a set temperature range.

[0021] Preferably, the data processor includes a storage unit and a display device. The storage unit is used to store the quality inspection results and corresponding batch tracking information to establish a batch quality traceability record of the sample to be tested. The display device is electrically connected to the data processor and is used to display the quality inspection results.

[0022] The beneficial effects of this utility model are as follows: Firstly, the same sample to be tested is divided into two parallel detection paths by a split structure, so that the detection of monomer residues and the detection of elemental impurities originate from the same time and the same sample, avoiding the difference in sample state caused by two samplings, and improving the consistency and comparability of detection data. Secondly, the second sample is diluted and mixed online through the microfluidic pretreatment structure before entering the element detection module, avoiding the instrument blockage or contamination caused by direct injection of high solid content samples. Moreover, the dilution ratio can be precisely adjusted by the metering pump, taking into account both detection accuracy and equipment protection. Third, by connecting the quantitative injection valve of the monomer component detection module in series with the liquid chromatography unit after the detection cell, and the data processor determines whether to activate it based on the monomer residue information, the device forms a two-stage detection flow path with online detection and rapid screening as the front stage and chromatographic separation and quantification as the back stage. This achieves both detection speed and monomer group identification capability, and chromatographic analysis is only activated when necessary, saving mobile phase consumption and extending the chromatographic column life. The obtained monomer component information can be used to correct the quality detection results, thereby improving the accuracy of the judgment. Fourth, by using multi-point sampling components and sampling switching valves to collect samples from different locations in the formulation pool, the representativeness of the sampling is improved and the detection deviation caused by differences in sampling location is reduced. Fifth, by using the grading valve and multiple storage tanks of the grading device, the quality inspection results generated by the data processor can directly drive the discharge diversion, and output the materials in the formula pool to the corresponding storage tank according to their quality inspection results. This allows the inspection results to be connected with the raw material processing flow, and the recovered materials can be graded and stored according to their quality level and applied to the corresponding grade of products, thereby increasing their utilization rate. Sixth, by storing quality inspection results and batch tracking information in the storage unit of the data processor, batch quality traceability records are established, providing controllable and traceable raw material quality assurance for the diaphragm production process.

[0023] In summary, through the synergistic combination of the above-mentioned structures, this utility model achieves the effects of good sample representativeness, fast detection speed, high data consistency, automated graded reuse, and batch traceability. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the device according to an embodiment of the present invention; Figure 2 This is a cross-sectional schematic diagram of the detection pool and its surrounding structure according to an embodiment of the present invention; and Figure 3 This is an enlarged schematic diagram of the flow channel of a microfluidic pretreatment structure according to an embodiment of the present invention.

[0025] F-Formulation tank, A-Multi-point sampling component, A1-Sampling port, A2-Sampling branch, B-Sampling switching valve, P-Protrusion, 1-Sampling flow path, 11-Transfer pump, 12-Filter, 2-Split structure, 21-First split port, 22-Second split port, 3-Detection tank, 31-Temperature control unit, 4-Monomer content detection module, 5-Microfluidic pretreatment structure, 51-Dilution channel, 511-Sample inlet, 512-Dilution inlet, 52-Mixing channel, 521-Analyte solution outlet, 53-Dilution storage tank, 54-Metering pump, 6-Element detection module, 7-Data processor, 71-Storage unit, 72-Display component, 8-Monomer component detection module, 81-Quantitative injection valve, 82-Liquid chromatography unit, 9-Fracturing device, 91-Fracturing valve, 92-Storage tank. Detailed Implementation

[0026] To make the above and / or other objectives, effects, and features of this utility model more apparent and understandable, preferred embodiments are described in detail below: Please see Figure 1The figure shows a schematic diagram of the overall structure of the device according to an embodiment of the present invention. As shown in the figure, in one embodiment, the online sampling and detection device with a diversion structure includes a sampling flow path 1, a diversion structure 2, a detection cell 3, a monomer content detection module 4, a microfluidic pretreatment structure 5, an element detection module 6, and a data processor 7. Their connection relationships and operating methods are described below: Sampling path 1 is used to connect to formulation tank F and obtain the test sample from the material in formulation tank F. That is, the test sample is obtained online from the material contained in formulation tank F, so its quality test result can represent the quality level of the material in formulation tank F, and can be used as the basis for subsequent classification and treatment of the material.

[0027] In one embodiment, the material is selected from emulsions, coating slurries, or suspensions, preferably aqueous cross-linked polyacrylate emulsions, but not limited thereto. The material can be incoming material or recycled material after recycling treatment. Since this device samples online from the formulation tank F, regardless of whether the material contained in the formulation tank F is incoming material or recycled material, it can be detected by the same sampling flow path 1 and the same detection process without the need to change the detection equipment or adjust the detection conditions, so that the detection data of the two are directly comparable, thereby ensuring the consistency of incoming material and recycled material.

[0028] In one embodiment, the device includes a multi-point sampling component A, which has multiple sampling ports A1 distributed at different locations in the formulation pool F and multiple sampling branches A2 connecting each sampling port A1. Each sampling branch A2 is connected to the sampling flow path 1. Since the material in the formulation pool F may still show differences at different locations due to particle sedimentation, temperature stratification, or stirring dead zones even after stirring, if only a single location is sampled, the obtained sample may not be representative of the overall state of the material in the formulation pool F. Therefore, by distributing multiple sampling ports A1 at different locations in the formulation pool F, samples can be collected from different locations, thereby improving the representativeness of the sampling.

[0029] Preferably, the device also includes a sampling switching valve B, which is connected between each sampling branch A2 and the sampling flow path 1, and is electrically connected to the data processor 7. The data processor 7 controls the sampling switching valve B to open one of them, so that each sample is a sample at a specific location. Alternatively, the data processor 7 can control the valves to open sequentially, so that each sampling port A1 can be automatically rotated without manual intervention.

[0030] Preferably, the sampling flow path 1 is provided with a delivery pump 11 and a filter element 12. The filter element 12 is located between the delivery pump 11 and the flow splitting structure 2. The delivery pump 11 is used to drive the sample to be tested to be transported along the sampling flow path 1, and the filter element 12 is used to filter out solid particles in the sample to be tested, so as to avoid solid particles entering the subsequent flow path and causing blockage or instrument damage.

[0031] The flow splitting structure 2 is connected to the sampling flow path 1 and has a first flow splitting port 21 and a second flow splitting port 22. It is used to split the sample to be tested into a first sample stream and a second sample stream. In one embodiment, the flow splitting structure 2 is a proportional flow splitting valve, which is electrically connected to the data processor 7 and is used to adjust the flow splitting ratio of the first sample stream and the second sample stream. This allows for flexible distribution of the flow rate based on the required sample volume for detection on both sides. The first sample stream is delivered to the detection cell 3 from the first flow splitting port 21, while the second sample stream is delivered to the microfluidic pretreatment structure 5 from the second flow splitting port 22.

[0032] Please refer to the following: Figure 2 The figure shows a cross-sectional schematic diagram of the detection cell and its surrounding structure. As shown in the figure, in one embodiment, one end of the detection cell 3 is connected to the first diversion port, so that the first sample stream flows through the detection cell 3. The monomer content detection module 4 is disposed on one side of the detection cell 3 and is used to detect the monomer residue information of the first sample stream.

[0033] In one embodiment, the monomer content detection module 4 includes, but is not limited to, a Fourier transform infrared spectroscopy unit, a dispersive infrared spectroscopy unit, or a near-infrared spectroscopy unit, thereby the monomer content detection module 4 receives and measures the monomer residue information based on the infrared signal of the first sample stream.

[0034] Preferably, the device further includes a temperature control unit 31, which is disposed on one side of the detection cell 3 and electrically connected to the data processor 7. It is used to maintain the temperature of the first sample stream within a set temperature range, thereby stabilizing the detection baseline and preventing temperature fluctuations from affecting the detection accuracy of monomer residue information.

[0035] In one embodiment, the device further includes a monomer component detection module 8, which is disposed on one side of the detection cell 3 and electrically connected to the data processor 7. The monomer component detection module 8 includes a quantitative injection valve 81 and a liquid chromatography unit 82. One end of the quantitative injection valve 81 is connected to the other end of the detection cell 3, and the other end of the quantitative injection valve 81 is connected to the liquid chromatography unit 82. When the monomer residual information exceeds a preset threshold, the data processor 7 drives the quantitative injection valve 81 to open, so that the first sample stream after flowing through the detection cell 3 enters the liquid chromatography unit 82 for separation and analysis to obtain monomer component information, so that the data processor 7 can correct the quality detection results based on the monomer component information.

[0036] In detail, the monomer content detection module 4 detects the residual monomer information based on the absorption intensity of the carbon-carbon double bond functional groups of the residual monomers in the sample. Although it can reflect the total amount of residual monomers in real time, the carbon-carbon double bond absorption peaks of various residual monomers such as butyl acrylate, methyl methacrylate, and acrylic acid are close to each other and overlap, making it difficult to distinguish the type and content of individual monomers. In contrast, the liquid chromatography unit 82 can separate the monomer components in the first sample stream and extract peaks separately, thereby obtaining the type and content of each monomer, i.e., the monomer component information.

[0037] Thus, this device forms a two-stage detection flow path structure: Under normal conditions, only the monomer content detection module 4 performs real-time screening of the first sample stream continuously flowing through the detection cell 3. At this time, the quantitative injection valve 81 is not open, and the liquid chromatography unit 82 is not activated. Once the monomer residue information exceeds the preset threshold, the data processor 7 drives the quantitative injection valve 81 to open, and a quantitative sample stream is collected and sent to the liquid chromatography unit 82 for separation and quantification, thereby confirming which monomer residue exceeds the standard. In this way, continuous monitoring can be achieved through the rapid response of online detection, and detailed information on the component level can be obtained when necessary. Moreover, since the chromatographic analysis is only activated when the standard is exceeded, unnecessary consumption of mobile phase can be avoided and the service life of the chromatographic column can be extended.

[0038] Furthermore, since the liquid chromatography unit 82 is electrically connected to the data processor 7, the data processor 7 can correct the quality test results based on the monomer component information. Because the impact of various residual monomers on downstream products is not the same, for example, acrylic acid has strong corrosiveness and reactivity, and its residue has a greater impact on the electrochemical stability of the battery, while butyl acrylate mainly affects odor and volatility, and its allowable residue level is relatively high. Therefore, even if the monomer residue information (i.e., the total amount of residual monomers) of two batches of test samples is the same, if the types of monomers exceeding the standard are different, the actual applicable uses of the batch of samples will also be different. Accordingly, the data processor 7 corrects the quality test results based on the monomer component information, so that the subsequent classification and treatment depends not only on the total amount of residual monomers, but also on the types of residual monomers, thereby avoiding misjudgment caused by judging solely based on the total amount and improving the accuracy of classification and determination.

[0039] Please refer to the following: Figure 3 This is a magnified schematic diagram of the flow channel of the microfluidic pretreatment structure. As shown in the figure, the microfluidic pretreatment structure 5 is connected to the second split port and is used to dilute and mix the second sample stream online to form the test solution.

[0040] In one embodiment, the microfluidic pretreatment structure 5 includes a dilution channel 51 and a mixing channel 52. One end of the dilution channel 51 is further provided with a sample inlet 511 and a diluent inlet 512. The sample inlet 511 is connected to a second split port, and the diluent inlet 512 is used to introduce diluent. One end of the mixing channel 52 is connected to the other end of the dilution channel 51, and the other end of the mixing channel 52 is further provided with a test liquid outlet 521, so that the test liquid is output to the element detection module 6 through the test liquid outlet 521.

[0041] It should be noted that the diluent is supplied independently from the outside and is a different liquid from the sample to be tested. In one embodiment, the diluent is deionized water or dilute nitric acid. Since the sample to be tested has a high solid content and high viscosity, if it is injected directly without dilution, it is easy to cause nebulizer blockage or torch contamination. Therefore, online dilution by the microfluidic pretreatment structure 5 can balance detection accuracy and equipment protection.

[0042] In one embodiment, the microfluidic pretreatment structure 5 is a microfluidic chip. The dilution channel 51 and the mixing channel 52 are formed in the microfluidic chip. The mixing channel 52 extends in a serpentine bend, and its inner wall may be provided with multiple protrusions P. Since the fluid in the channel is mostly in a laminar flow state, the two liquids merge and mix only by molecular diffusion. A very long channel is required to mix evenly. By the serpentine bend of the mixing channel 52, the fluid can generate secondary flow at each turning point and repeatedly fold and stretch. In addition, the multiple protrusions P on the inner wall disturb the streamlines and increase the interfacial contact between the two liquids, thereby promoting the second sample stream and the diluent to mix fully within a limited channel length to form a uniform test liquid.

[0043] Preferably, the device further includes a diluent reservoir 53 and a metering pump 54. The diluent reservoir 53 is connected to the diluent inlet 512 via the metering pump 54. The metering pump 54 is electrically connected to the data processor 7 and is used to adjust the flow rate of the diluent input to the diluent inlet 512 so that the second sample stream and the diluent are mixed at a set dilution ratio. In this way, the dilution factor can be continuously adjusted by the data processor 7 via the metering pump 54 without replacing the microfluidic pretreatment structure 5 to accommodate the differences in solid content of different batches of samples to be tested.

[0044] The element detection module 6 is connected to the microfluidic pretreatment structure 5 and is used to detect the elemental impurity information of the test liquid. In one embodiment, the element detection module 6 includes an inductively coupled plasma emission spectroscopy unit. After the test liquid is atomized, it is sent into a plasma torch. The metal atoms in the plasma are excited and emit light of characteristic wavelengths, thereby quantifying the elemental impurity information. The elemental impurity information includes the content information of at least one metal element selected from sodium, potassium, calcium, and iron.

[0045] The data processor 7 is electrically connected to the monomer content detection module 4 and the element detection module 6, respectively, and is used to generate the quality detection results of the sample to be tested based on the monomer residue information and element impurity information.

[0046] In one embodiment, the data processor 7 includes a storage unit 71 and a display 72. The storage unit 71 is used to store the quality test results and the corresponding batch tracking information to establish a batch quality traceability record of the sample to be tested. The display 72 is electrically connected to the data processor 7 and is used to display the quality test results. In this way, the quality level of each batch of sample to be tested is recorded for subsequent verification, providing controllable and traceable raw material quality assurance for the subsequent diaphragm production process.

[0047] In one embodiment, the device further includes a grading device 9 electrically connected to the data processor 7. The grading device 9 includes a grading valve 91 and multiple storage tanks 92. The grading valve 91 is connected to the formulation tank F and has multiple discharge channels. Each storage tank 92 is connected to a respective discharge channel. The data processor 7 drives the grading valve 91 to open the corresponding discharge channel based on the quality inspection results, outputting the material in the formulation tank F to the corresponding storage tank 92.

[0048] In detail, the data processor 7 compares the quality inspection results with multiple preset threshold ranges to determine the quality level of the material in the formulation tank F, and drives the grading valve 91 to open the corresponding discharge channel. For example, when both the monomer residue information and the elemental impurity information are lower than the corresponding threshold, it is determined to be of the first level and directed to the first storage tank for direct use in diaphragm coating. When the monomer residue information is between the corresponding threshold range, it is determined to be of the second level and directed to the second storage tank for subsequent processing by external polymerization equipment and re-inspection before use. When it exceeds the highest threshold, it is determined to be of the third level and directed to the third storage tank for further processing. However, this is not limited to the above; the corresponding threshold can be set according to the requirements.

[0049] Preferably, when the device is equipped with a monomer component detection module 8, since the data processor 7 can correct the quality detection results based on the monomer component information, the grading valve 91 is based on the corrected quality detection results. This allows the grading and disposal of materials to depend not only on the total amount of residual monomers, but also on the type of residual monomers. In this way, the quality detection results can directly drive the discharge diversion, eliminating the need for manual interpretation of the test report and manual scheduling of the material source. This connects the detection and raw material disposal processes, and allows the recovered materials to be graded and stored according to their quality level and applied to products of the corresponding grade, thereby increasing their utilization rate.

[0050] To clearly illustrate the embodiments of this utility model, the following description is provided: After the device is started, the data processor 7 controls the sampling switching valve B to open each sampling branch A2 in sequence, so that the delivery pump 11 collects the sample to be tested one by one from each sampling port A1 of the formulation tank F. The monomer residue information and elemental impurity information obtained from each sampling are stored in the storage unit 71 respectively. After each sampling port A1 has completed sampling and testing, the data processor 7 uses the statistical data of monomer residue information and elemental impurity information in each test result to generate the quality test result of the material in the formulation tank F, and drives the grading valve 91 to open the corresponding discharge channel.

[0051] Specifically, the data processor 7's processing of monomer residue information also includes, when the monomer residue information does not exceed a preset threshold, the data processor 7 determines the material's quality classification based on the quality detection results generated by the monomer residue information and elemental impurity information; or When the monomer residue information exceeds the preset threshold, the data processor 7 drives the quantitative injection valve 81 to open, so that the first sample stream enters the liquid chromatography unit 82 for separation and analysis to obtain monomer component information, thereby confirming the type of monomer that exceeds the standard. At this time, the data processor 7 re-corrects the quality test results based on the monomer type, monomer residue information and elemental impurity information, and determines the quality grade of the material based on the corrected quality test results.

[0052] The data processor 7 stores the quality inspection results and batch tracking information in the storage unit 71, and displays them on the display unit 72.

[0053] Accordingly, this utility model can automatically complete the entire process of online sampling, splitting, dual-module parallel detection, chromatographic re-inspection, material classification and storage, and batch traceability of the sample to be tested. It can operate continuously without human intervention, effectively improving the integration, speed, and data consistency of the detection.

[0054] In summary, the online sampling and detection device with a diversion structure of this invention divides the sample to be tested obtained online from the formulation pool into two parallel detection paths, so that the information on monomer residues and elemental impurities originates from the same sample, thereby improving data consistency. The monomer component detection module forms a two-stage detection flow path for rapid screening and quantitative separation, achieving both detection speed and group identification capability. Furthermore, the microfluidic pretreatment structure dilutes the sample entering the elemental detection module online, balancing detection accuracy and equipment protection. At the same time, by connecting the quality detection results with the raw material disposal process, the utilization rate of recovered materials is improved, thus meeting the purpose of this invention.

[0055] However, the above description is only a preferred embodiment of the present utility model, but it cannot be used to limit the scope of patent protection of the present utility model; therefore, any simple equivalent changes and modifications made in accordance with the scope of patent protection and the contents of the specification of the present utility model shall still fall within the scope of patent protection of the present utility model.

Claims

1. An online sampling and detection device with a diversion structure, characterized in that, include: A sampling flow path is used to connect to a formulation pool to obtain a sample to be tested from a material in the formulation pool; A flow splitting structure is connected to the sampling flow path and is provided with a first flow splitting port and a second flow splitting port for splitting the sample to be tested into a first sample stream and a second sample stream. A detection cell, one end of which is connected to the first diversion port, so that the first sample flow passes through the detection cell; A monomer content detection module is disposed on one side of the detection cell and is used to detect the monomer residue information of the first sample stream; A microfluidic pretreatment structure is connected to the second split port for online dilution and mixing of the second sample stream to form a test solution; A single-element detection module, connected to the microfluidic pretreatment structure, is used to detect single-element impurity information in the test liquid; and A data processor is electrically connected to the monomer content detection module and the element detection module, respectively, and is used to generate a quality detection result of the sample to be tested based on the monomer residue information and the element impurity information.

2. The on-line sampling detection apparatus with a flow splitting structure according to claim 1, wherein, It also includes a monomer component detection module, which is disposed on one side of the detection cell and electrically connected to the data processor. The monomer component detection module includes a quantitative injection valve and a liquid chromatography unit. When the monomer residual information exceeds a preset threshold, the data processor drives the quantitative injection valve to open, so that the first sample stream flowing through the detection cell enters the liquid chromatography unit for separation and analysis to obtain monomer component information, so that the data processor can correct the quality detection result based on the monomer component information.

3. The on-line sampling detection apparatus with a flow splitting structure according to claim 1, wherein, It also includes a grading device electrically connected to the data processor. The grading device includes a grading valve and multiple storage tanks. The grading valve is used to communicate with the formula pool and has multiple discharge channels. Each of the storage tanks is respectively connected to each of the discharge channels. The data processor drives the grading valve to open the corresponding discharge channel according to the quality detection result, so as to output the material in the formula pool to the corresponding storage tank.

4. The on-line sampling detection apparatus with a flow splitting structure according to claim 1, wherein, It includes a multi-point sampling device, which has multiple sampling ports distributed at different locations in the formulation pool and multiple sampling branches connecting each of the sampling ports. All the sampling branches converge and connect to the sampling flow path.

5. The on-line sampling detection apparatus with a flow splitting structure according to claim 4, wherein, It includes a sampling switching valve, which is connected between each of the sampling branches and the sampling flow path, and is electrically connected to the data processor, for selectively or sequentially activating each of the sampling branches.

6. The on-line sampling detection apparatus with a flow splitting structure according to claim 1, wherein, The sampling flow path is equipped with a delivery pump and a filter element. The filter element is located between the delivery pump and the flow splitting structure and is used to filter out a solid particle in the sample to be tested.

7. The on-line sampling detection apparatus with a flow splitting structure according to claim 1, wherein, The flow splitting structure is a proportional flow splitting valve, which is electrically connected to the data processor and is used to adjust the flow splitting ratio between the first sample stream and the second sample stream.

8. The online sampling and detection device with a diversion structure as described in claim 1, characterized in that, The monomer content detection module includes a Fourier transform infrared spectroscopy unit, a dispersive infrared spectroscopy unit, or a near-infrared spectroscopy unit.

9. The on-line sampling detection apparatus with a flow splitting structure according to claim 1, wherein, The microfluidic pretreatment structure includes a dilution channel and a mixing channel. One end of the dilution channel is provided with a sample inlet and a diluent inlet. The sample inlet is connected to the second split port. The diluent inlet is used to introduce a diluent. One end of the mixing channel is connected to the other end of the dilution channel, and the other end of the mixing channel is provided with a test liquid outlet, so that the test liquid is output through the test liquid outlet.

10. The online sampling and detection device with a diversion structure as described in claim 9, characterized in that, The microfluidic pretreatment structure is a microfluidic chip, and the dilution channel and the mixing channel are formed within the microfluidic chip.

11. The online sampling and detection device with a diversion structure as described in claim 9, characterized in that, It also includes a diluent storage tank and a metering pump. The diluent storage tank is connected to the diluent inlet via the metering pump. The metering pump is electrically connected to the data processor and is used to adjust the flow rate of the diluent input to the diluent inlet so that the second sample stream is mixed with the diluent at a set dilution ratio.

12. The online sampling and detection device with a diversion structure as described in claim 1, characterized in that, The element detection module includes an inductively coupled plasma emission spectroscopy unit.

13. The online sampling and detection device with a diversion structure as described in claim 1, characterized in that, It includes a temperature control unit, which is disposed on one side of the detection cell and electrically connected to the data processor, for maintaining the temperature of the first sample stream within a set temperature range.

14. The online sampling and detection device with a diversion structure as described in claim 1, characterized in that, The data processor includes a storage unit and a display device. The storage unit is used to store the quality inspection results and corresponding batch tracking information to establish a batch quality traceability record of the sample to be tested. The display device is electrically connected to the data processor and is used to display the quality inspection results.

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