Free silicon dioxide filtering device

Abstract

The utility model discloses a free silicon dioxide filtering device, which relates to the technical field of detection and adopts the technical scheme that the free silicon dioxide filtering device comprises a sample unit and a container, the sample unit is provided with a sample heating assembly which can heat the sample container on the sample placing position; the sampling unit is provided with a liquid extraction assembly corresponding to the sample unit, and the liquid extraction assembly can extract the sample to be filtered in the sample container; the filtering unit can be used for placing a filtering funnel; the liquid adding unit is provided with a liquid adding assembly corresponding to the filtering unit, and the liquid adding assembly can add the sample extracted by the liquid extracting assembly into the filtering funnel on the filtering position. The device has the beneficial effects that the device does not need to manually transfer a sample, manually add hydrochloric acid to wash and manually prepare hot water in a filtering stage in a free silicon dioxide determination experiment, the filter paper is more uniformly washed, the labor intensity of experimenters is greatly reduced, various risks in a sample transfer process are avoided, and the working efficiency is improved. And the experiment process is safer and more convenient.

Description

Technical Field

[0001] This utility model relates to the field of filtration technology, specifically to a free silica filtration device. Background Technology

[0002] In the determination of airborne dust, according to the national standard requirements for the filtration stage, the beaker containing the sample contents needs to be allowed to stand slightly until the suspension settles slightly. Then, it should be filtered while still hot, with the filtrate not exceeding 2 / 3 of the filter paper's volume. After filtration, the beaker is washed with 0.1 mol hydrochloric acid and transferred to a funnel. The sediment on the filter paper is then rinsed 3-5 times, followed by washing with hot distilled water until no acidic reaction is observed (using pH test paper). If a platinum crucible is used, it should be washed 3 times after the phosphate reaction has ceased. This process of sample filtration in this detection method is quite cumbersome and currently requires manual handling by laboratory personnel, resulting in high labor intensity and excessive time and manpower consumption. Utility Model Content

[0003] To address one of the shortcomings of existing technologies, this utility model provides a free silica filtration device, solving the problem of automation in free silica filtration.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a free silica filtration device, comprising:

[0005] The sample unit has at least one sample placement position for placing a sample container; the sample unit is equipped with a sample heating component to heat the sample container in the sample placement position.

[0006] The sampling unit is equipped with a liquid extraction component, which can extract the sample to be filtered from the sample container.

[0007] The filter unit shall have at least one filter position, on which a filter funnel may be placed;

[0008] The liquid addition unit is equipped with a liquid addition component corresponding to the filtration unit. The liquid addition component is connected to the liquid extraction component through a pipeline, which can add the sample extracted by the liquid extraction component into the filter funnel on the filtration position. The liquid addition component is also connected to the cleaning liquid supply source through a pipeline, which can inject cleaning liquid into the sample container and the filter funnel.

[0009] Preferably, the sample unit includes several sample placement positions, which are arranged horizontally in a rectangular array.

[0010] The sampling unit's liquid extraction component includes several liquid extraction tubes, which can extract samples from the sample container by moving in a horizontal or vertical direction.

[0011] The filtering unit includes several filtering positions, which are arranged horizontally in a rectangular array.

[0012] The liquid addition unit includes several liquid addition pipes and flushing pipes. The liquid addition pipes are connected to the liquid extraction assembly through pipelines; the flushing pipes are connected to the cleaning fluid supply source.

[0013] The outlet ends of both the liquid addition pipe and the rinsing pipe are positioned towards the filter funnel.

[0014] Preferably, the sample heating assembly includes:

[0015] The heating element can be electrically heated;

[0016] A heat spreader is disposed on the upper side of the heating element and is located between the sample container and the heating element, which can uniformly transfer the heat of the heating element to the sample container.

[0017] A heat insulation plate is disposed on the lower side of the heating element;

[0018] The sample heating temperature measuring element can provide feedback on the heat generated by the heating element.

[0019] Preferably, the sampling unit further includes:

[0020] A liquid extraction rack is positioned across the sample placement area of ​​the sample unit; the liquid extraction tubes are arranged on the liquid extraction rack, and at least one row of the liquid extraction tubes is arranged in a straight array.

[0021] The liquid extraction drive assembly is linked to the liquid extraction frame and can drive the liquid extraction frame to move horizontally and rise vertically.

[0022] One liquid pump is provided for each of the aforementioned liquid extraction tubes.

[0023] Preferably, the liquid pumping drive assembly includes:

[0024] The support pole is a vertically installed telescopic pole, and the movable end of the support pole is fixedly connected to the liquid extraction rack.

[0025] The pole lateral movement assembly is linked to the lower part of the pole and can drive the pole to move laterally.

[0026] Preferably, the filtering unit further includes:

[0027] The liquid collection tank has an internal cavity and a filter position at the top, allowing the liquid flowing out of the filter funnel to enter the cavity of the liquid collection tank.

[0028] Preferably, the liquid addition unit further includes:

[0029] The hydrochloric acid dispensing assembly has its inlet end connected to an external hydrochloric acid supply pipeline, and its outlet end extended to the sample container of the sample unit.

[0030] Preferably, one liquid addition tube and one flushing tube are combined to form a liquid addition tube group, and each filter funnel is provided with a corresponding liquid addition tube group;

[0031] The liquid dispensing unit also includes:

[0032] The spray nozzle is connected to the outlet end of the flushing pipe; the water outlet direction of the spray nozzle is towards the filter funnel.

[0033] Preferably, the liquid addition unit further includes:

[0034] A liquid filling rack is straddling the filter funnel, and the liquid filling tube assembly is arranged in at least one row in a linear array on the liquid filling rack;

[0035] The liquid dispensing drive assembly is linked to the liquid dispensing rack and can drive the liquid dispensing rack to move laterally.

[0036] Preferably, the liquid addition unit further includes:

[0037] The flushing heating component is located between the flushing pipe and the cleaning fluid supply source, and can heat the cleaning fluid entering the flushing pipe.

[0038] 1. This device utilizes a liquid extraction unit to transfer samples during the filtration stage of the free silica determination experiment; the sample container and the filter funnel are placed in layers, which saves space and allows for the simultaneous processing of multiple samples.

[0039] 2. The sample heating component integrated in this device directly heats the sample container through heating elements and a heat spreader, which can simultaneously ensure the heat preservation requirements of samples in multiple locations without the need for additional heat preservation devices.

[0040] 3. In addition to transferring samples, the liquid addition unit of this device can also deliver cleaning solution and clean sample containers and filter funnels.

[0041] 4. The liquid addition unit of this device integrates a rinsing heating component to heat the pure water used for rinsing, eliminating the need to prepare hot water separately for cleaning the filter paper.

[0042] In the free silica determination experiment, this device eliminates the need for manual sample transfer, manual hydrochloric acid rinsing, and manual hot water preparation during the filtration stage. The filter paper is rinsed more evenly, greatly reducing the labor intensity of the experimenters, avoiding various risks in the sample transfer process, making the experiment safer and more convenient, freeing up labor, and solving the problem of the need for long-term and complex manual operations in the past. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0044] Figure 2 This is a front view of an embodiment of this application;

[0045] Figure 3 This is a right view of an embodiment of this application;

[0046] Figure 4 This is a left view of an embodiment of this application;

[0047] Figure 5 A perspective view of the hidden outer shell state in an embodiment of this application;

[0048] Figure 6 The main view of the outer shell state is hidden for embodiments of this application;

[0049] Figure 7 The left view of the outer casing state is hidden in the embodiments of this application;

[0050] Figure 8 A top view showing the hidden outer shell state in an embodiment of this application.

[0051] In the picture:

[0052] 100. Housing; 101. Touch screen; 102. Waterproof switch; 103. Residual current device; 104. Fuse; 105. Power interface; 106. Inlet / outlet liquid connection port; 107. Hydrochloric acid peristaltic pump;

[0053] 1. Sample unit; 11. Sample container; 12. Sample heating assembly; 13. Sample heating temperature measuring element;

[0054] 2. Sampling unit; 21. Sampling tube; 22. Sampling rack; 23. Sampling drive assembly; 231. Frame rod; 232. Frame rod lateral movement assembly; 233. Slider slide rail assembly; 24. Sampling pump; 25. Spring;

[0055] 3. Filter unit; 31. Filter funnel; 32. Collection tank; 321. Collection tank level sensor; 322. Drain pump.

[0056] 4. Liquid addition unit; 41. Liquid addition pipe; 42. Rinse pipe; 43. Spray head; 44. Liquid addition rack; 45. Liquid addition drive assembly; 46. Rinse heating assembly; 461. Pure water metering cup; 462. Pure water level sensor; 463. Pure water heating module. Detailed Implementation

[0057] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0058] Please see Figures 1-4 This application provides the following technical solutions:

[0059] A free silica filtration device includes a housing 100, which is divided into upper and lower layers. The upper layer houses a sample unit 1, and the lower layer houses a filtration unit 3. The sample unit 1 has several sample placement positions arranged horizontally in a rectangular array for placing sample containers 11, such as sample cups or sample bottles. The filtration unit 3 has several filtration positions arranged horizontally in a rectangular array, where filter funnels 31 can be placed. In this embodiment, the sample unit 1 has four rows of sample placement rows, each with six sample placement positions, for a total of 24 sample containers 11. Corresponding to the number of sample containers 11 in each row, the filtration unit 3 has two rows of filter funnels, each with six filter funnels 31, for a total of 12 filter funnels 31.

[0060] In the upper region of the outer shell 100, a sampling unit 2 is provided for extracting samples from the sample container 11. In the lower region of the outer shell 100, a liquid addition unit 4 is provided corresponding to the filtration unit 3. The liquid addition unit 4 includes a liquid addition component, which is connected to the sampling component via a pipeline, allowing the sample extracted by the sampling component to be added to the filter funnel 31 on the filtration position. The liquid addition component is also connected to a cleaning solution supply source via a pipeline, allowing cleaning solution to be injected into the sample container 11 and the filter funnel 31. There are two types of cleaning solution here: hydrochloric acid and pure water.

[0061] A touchscreen 101 is located on the front side of the housing 100, facing the user. Several cooling fans are located on the rear side of the housing 100. A waterproof switch 102, a leakage current protector 103, a fuse 104, a power interface 105, inlet / outlet liquid inlets 106, and a peristaltic pump 107 are respectively located on both sides of the housing 100. The touchscreen, interface, and switch components of the housing 100 can be implemented using existing technology. This is not the focus of this solution and does not require specific restrictions; it can be adjusted according to requirements.

[0062] During operation, the operator places the sample container 11 containing the sample to be filtered. The device is then activated, and the extraction unit 2 extracts the sample from container 11, which is then transported through a pipeline to the addition unit 4 and injected into the filter funnel 31 of the filtration unit 3. After filtration, the addition unit 4 injects hydrochloric acid into container 11 to clean it according to national standard testing procedures. The extraction unit 2 then extracts and delivers the hydrochloric acid to the filter funnel 31. After cleaning with hydrochloric acid, the addition unit 4 extracts pure water to rinse the filter funnel 31, completing the operation.

[0063] Based on the above implementation plan, see Figure 5 and Figure 6 The sample unit 1 is equipped with a sample heating component 12. The sample heating component 12 only needs to be able to heat the sample container 11, and various specific forms can be adopted.

[0064] This solution provides a specific implementation of the heating component 12, in order to Figure 6 With the center direction as a reference, each row of sample containers 11 is divided into two groups, left and right, with three sample containers 11 arranged side by side in each group. A heating assembly 12 is provided for each group of three sample containers 11. Each heating assembly 12 includes a heating element, a heat spreader, a heat insulation plate, and a sample heating temperature measuring element 13. The heating element is a stainless steel electric heating plate for electric heating. The heat spreader is located above the heating element, between the sample container 11 and the heating element, and uses an aluminum plate to evenly transfer heat from the heating element to the sample container 11. The heat insulation plate is located below the heating element, using a mica heat insulation plate to block heat transferred downwards from the heating element. The sample heating temperature measuring element 13 uses a thermocouple, with its temperature probe in contact with the heating element to provide temperature feedback. After the sample containers are placed, the device is turned on, and the heating element immediately begins heating, transferring heat to the sample container 11 through the heat spreader to prevent the solution inside the sample container from cooling during device operation.

[0065] Based on the above implementation scheme, the sampling unit 2 includes a row of six sampling tubes 21, with a sampling pump 24 corresponding to each sampling tube 21. The sampling pump 24 is a peristaltic pump. The sampling tubes 21 can move in both horizontal and vertical directions, thereby extracting samples from all sample containers 11.

[0066] This solution provides a specific implementation of the sampling unit 2. The sampling unit 2 also includes a liquid extraction rack 22 positioned above the sample placement position of the sample unit 1, with liquid extraction tubes 21 arranged in a linear array on the liquid extraction rack 22. The liquid extraction rack 22 and the liquid extraction drive assembly 23 are linked. The liquid extraction drive assembly 23 drives the liquid extraction rack 22 to move horizontally and vertically.

[0067] See Figure 5 The liquid extraction drive assembly 23 includes a vertically arranged support rod 231, which is an electrically telescopic rod. The movable end of the support rod 231 is fixedly connected to the liquid extraction frame 22. The support rod 231 and the support rod lateral movement assembly 232 are linked, and the support rod 231 is driven to move laterally through the support rod lateral movement assembly 232. The support rod lateral movement assembly 232 includes two parts, one of which is a screw-slider assembly located at the lower part of the support rod 231. The screw in the screw-slider assembly is driven to rotate by a motor, and the screw and the slider are threadedly connected, with a guide rod provided on the side of the slider. The slider is fixedly connected to the bottom end of the support rod 231.

[0068] A slider-rail assembly 233 is also provided in the middle of the support rod 231. The sliding direction of the slider-rail assembly 233 is parallel to the sliding direction of the screw-slider assembly. The slider-rail assembly 233 can improve the overall stability of the support rod 231 and ensure the smooth movement of the liquid extraction frame 22.

[0069] Based on the above implementation scheme, a spring 25 is provided between the connection between the suction tube 21 and the suction frame 22. When the suction frame 22 contacts the bottom of the sample container 11 under the action of the support rod 231, the spring 25 is compressed, and the suction tube 21 moves slightly upward. With this structure, sample containers 11 of different depths can be adapted to a certain extent without having to specifically adjust the extension and retraction of the support rod 231.

[0070] Based on the above implementation scheme, the sample container 11 in this scheme can adopt existing sample cups, sample bottles, etc. This scheme also provides a structural form for the sample container 11, where the bottom of the internal space is inverted conical, which facilitates the collection of sample solution. The bottom end of the suction tube 21 is configured corresponding to the bottom structure of the sample container 11.

[0071] As another type of sample container 11, its inner bottom is an approximately inverted triangular structure formed by the convergence of two inclined surfaces. The lower end of the liquid extraction tube 21 is provided with two inclined surfaces, which can extend to the bottom of the sample container 11. Liquid extraction ports are opened on the two inclined surfaces, and liquid is extracted from the sample container 11 through the liquid extraction ports.

[0072] The sample container 11 and the extraction tube 21 structure of this solution can extract the sample more thoroughly and are less likely to leave sample residue in the sample container 11.

[0073] Based on the above implementation plan, see Figures 5 to 8The filtration unit 3 also includes a collection tank 32, which has an internal cavity and 12 filtration positions at the top. Filter funnels 31 are placed on the collection tank 32, allowing liquid flowing out of the funnels to enter the cavity. A liquid level sensor 321 and a drain pump 322 are installed on the collection tank 32. The liquid level sensor 321 provides feedback on the liquid level inside the collection tank 32, while the drain pump 322 discharges waste liquid from the collection tank 32.

[0074] In addition, the collection tank 32 can also be connected to the outer shell 100 by a pull-out movable connection, so that the filter funnel 31 can be placed more conveniently by pulling it to the front of the outer shell 100.

[0075] Based on the above implementation scheme, a negative pressure mechanism can be added to the device to enable the filter funnel 31 to achieve the effect of suction filtration. For example, a negative pressure pump can be installed to evacuate the filter funnel 31.

[0076] Based on the above implementation plan, see Figures 5 to 7 The liquid addition unit 4 includes 6 liquid addition tube groups. Each liquid addition tube group includes a liquid addition tube 41 and a flushing tube 42. The liquid addition tube 41 is connected to the liquid extraction assembly through a pipeline. The flushing tube 42 is connected to the pure water supply source of the cleaning liquid supply source. The liquid outlet of the liquid addition tube 41 and the flushing tube 42 of each liquid addition tube group are directed toward a corresponding filter funnel 31.

[0077] A spray head 43 is also provided at the water outlet end of the rinsing pipe 42. The water outlet direction of the spray head 43 is towards the filter funnel 31. The water flow sprayed from the rinsing pipe 42 can be dispersed through the spray head 43, thereby improving the rinsing effect on the filter funnel 31.

[0078] Based on the above implementation plan, see Figure 5 The liquid addition unit 4 also includes a liquid addition rack 44 spanning above the filter funnel 31, with six liquid addition tubes arranged in a linear array on the liquid addition rack 44. A liquid addition drive assembly 45 is linked to the liquid addition rack 44, driving the liquid addition rack 44 to move laterally. The liquid addition drive assembly 45 can also be a screw-slider combination; one or two sets of screw-slider combinations are set at opposite ends of the liquid addition rack 44. The liquid addition drive assembly 45 moves the liquid addition rack 44, causing the liquid addition tubes 41 and rinsing tubes 42 on the liquid addition rack 44 to move above the two rows of filter funnels 31.

[0079] Based on the above implementation scheme, corresponding to the hydrochloric acid rinsing process, the liquid addition unit 4 is equipped with a hydrochloric acid addition component, whose inlet end is connected to the external hydrochloric acid supply pipeline, and whose outlet end extends to the sample container 11 of the sample unit 1.

[0080] The inlet end of the hydrochloric acid dispensing assembly is also the inlet end of the hydrochloric acid peristaltic pump 107. To achieve quantitative use of hydrochloric acid, the outlet end of the hydrochloric acid peristaltic pump 107 is connected to a metering tube for measuring the volume of hydrochloric acid. The metering tube is made of a thin tube coiled up and can hold the required volume of hydrochloric acid for the experiment. When hydrochloric acid needs to be added, the hydrochloric acid peristaltic pump 107 is activated to pump the hydrochloric acid from the hydrochloric acid bottle into the metering tube. Excess hydrochloric acid is discharged through one of the ports of the ten-row solenoid valve connected to the metering tube, thus ensuring that the metering tube is filled with hydrochloric acid. The metering tube is connected to a three-way solenoid valve and an air pump. After the metering tube is filled with hydrochloric acid, the three-way solenoid valve connects the air pump and the metering tube, blowing the hydrochloric acid in the metering tube into the sample container 11 to wash the sample container 11. After washing, the peristaltic pump 24 draws the hydrochloric acid into the filter funnel 31 to complete the hydrochloric acid rinsing process. The piping between the hydrochloric acid and the sample container 11 only needs to ensure that the two can be connected by the air pump; the specific method is not limited.

[0081] Based on the above implementation scheme, the liquid addition unit 4 also includes a rinsing and heating component 46, which quantifies and heats the pure water entering the rinsing pipe 42. A water pump is installed to supply pure water. The water pump is connected to a pure water metering cup 461. A pure water level sensor 462 is installed on the pure water metering cup 461. When the required water volume is reached, the pure water level sensor 462 is triggered and the water supply stops. Then, a three-way solenoid valve switches the water outlet route to another water pump to draw pure water into the pure water heating module 463. The pure water heating module 463 consists of a copper spiral tube, a heating rod, a temperature measuring thermocouple, and insulation material. When water passes through the copper spiral tube, the heating rod heats the water passing through the tube and then sprays it out from the spray head 43 above the filter funnel 31 to wash the sediment on the filter paper of the filter funnel 31. The outlet of this spray head 43 is an obliquely distributed circumferential opening on the conical surface. When the water is sprayed out from the rinsing pipe 42, it is divided into multiple streams by the spray head and sprayed out in a sprinkler pattern to ensure that the filter paper is rinsed until there is no acid reaction.

[0082] In the description of this application and its embodiments, it should be understood that the terms "top", "bottom", "height", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0083] In this application and its embodiments, unless otherwise expressly specified and limited, the terms "set," "install," "connect," "link," "fix," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0084] In this application and its embodiments, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0085] The foregoing disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described above. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0086] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0087] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A free silica filtration device, characterized in that, include: The sample unit shall have at least one sample placement position for placing a sample container; The sample unit is equipped with a sample heating component, which can heat the sample container at the sample placement position; The sampling unit is equipped with a liquid extraction component, which can extract the sample to be filtered from the sample container. The filter unit shall have at least one filter position, on which a filter funnel may be placed; The liquid addition unit is equipped with a liquid addition component corresponding to the filtration unit. The liquid addition component is connected to the liquid extraction component through a pipeline, which can add the sample extracted by the liquid extraction component into the filter funnel on the filtration position. The liquid addition component is also connected to the cleaning liquid supply source through a pipeline, which can inject cleaning liquid into the sample container and the filter funnel.

2. The free silica filtration device as described in claim 1, characterized in that, The sample unit includes several sample placement positions, which are arranged horizontally in a rectangular array. The sampling unit's liquid extraction component includes several liquid extraction tubes, which can extract samples from the sample container by moving in a horizontal or vertical direction. The filtering unit includes several filtering positions, which are arranged horizontally in a rectangular array. The liquid addition unit includes several liquid addition pipes and flushing pipes. The liquid addition pipes are connected to the liquid extraction assembly through pipelines; the flushing pipes are connected to the cleaning fluid supply source. The outlet ends of both the liquid addition pipe and the rinsing pipe are positioned towards the filter funnel.

3. The free silica filtration device as described in claim 1, characterized in that, The sample heating assembly includes: The heating element can be electrically heated; A heat spreader is disposed on the upper side of the heating element and is located between the sample container and the heating element, which can uniformly transfer the heat of the heating element to the sample container. A heat insulation plate is disposed on the lower side of the heating element; The sample heating temperature measuring element can provide feedback on the heat generated by the heating element.

4. The free silica filtration device as described in claim 2, characterized in that, The sampling unit further includes: A liquid extraction rack is positioned across the sample placement area of ​​the sample unit; the liquid extraction tubes are arranged on the liquid extraction rack, and at least one row of the liquid extraction tubes is arranged in a straight array. The liquid extraction drive assembly is linked to the liquid extraction frame and can drive the liquid extraction frame to move horizontally and rise vertically. One liquid pump is provided for each of the aforementioned liquid extraction tubes.

5. The free silica filtration device as described in claim 4, characterized in that, The liquid extraction drive assembly includes: The support pole is a vertically installed telescopic pole, and the movable end of the support pole is fixedly connected to the liquid extraction rack. The pole lateral movement assembly is linked to the lower part of the pole and can drive the pole to move laterally.

6. The free silica filtration device as described in claim 1, characterized in that, The filtering unit further includes: The liquid collection tank has an internal cavity and a filter position at the top, allowing the liquid flowing out of the filter funnel to enter the cavity of the liquid collection tank.

7. The free silica filtration device as described in claim 2, characterized in that, The liquid dispensing unit also includes: The hydrochloric acid dispensing assembly has its inlet end connected to an external hydrochloric acid supply pipeline, and its outlet end extended to the sample container of the sample unit.

8. The free silica filtration device as described in claim 7, characterized in that, One liquid addition tube and one flushing tube are combined to form a liquid addition tube group, and each filter funnel is provided with a corresponding liquid addition tube group; The liquid dispensing unit also includes: The spray nozzle is connected to the outlet end of the flushing pipe; the water outlet direction of the spray nozzle is towards the filter funnel.

9. The free silica filtration device as described in claim 8, characterized in that, The liquid dispensing unit also includes: A liquid filling rack is straddling the filter funnel, and the liquid filling tube assembly is arranged in at least one row in a linear array on the liquid filling rack; The liquid filling drive component is linked to the liquid filling rack and can drive the liquid filling rack to move laterally.

10. The free silica filtration device as described in claim 9, characterized in that, The liquid dispensing unit also includes: The flushing heating component is located between the flushing pipe and the cleaning fluid supply source, and can heat the cleaning fluid entering the flushing pipe.

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