Batch filter press device

Abstract

The utility model provides a kind of batch filter press device, it is used for batch processing filter sample bottle, batch filter press device includes frame, multiple filter sample bottles, sample bearing table, filter press drive mechanism and pressing plate.Filter sample bottle includes outer tube, inner tube, inner tube is inserted into outer tube, sample bearing table is arranged at the bottom end of frame, sample bearing table is used to carry and position multiple array filter sample bottles arranged into array, filter press drive mechanism is connected at the top end of frame, pressing plate is connected with the output end of filter press drive mechanism and is located above sample bearing table, filter press drive mechanism drives pressing plate to move downward and press, so that the lower surface of pressing plate is used to abut with the top of multiple inner tubes, to realize that multiple inner tubes are inserted into multiple outer tubes respectively.By setting sample bearing table, filter press drive mechanism and pressing plate, the synchronous batch filter pressing of multiple filter sample bottles is realized.By upgrading traditional single tube manual operation to automated batch processing, the efficiency of sample pretreatment is improved.

Description

Technical Field

[0001] This utility model relates to the field of sample pretreatment technology, and in particular to a batch pressure filtration device. Background Technology

[0002] In liquid chromatography (LC) detection in fields such as pharmaceutical analysis, environmental monitoring, and food safety, large quantities of liquid samples often require pretreatment before filtration. Although laboratories have widely adopted integrated flash filter vials to replace the old "syringe + filter" combination, inefficiency and operational consistency issues remain prominent when processing batches of samples.

[0003] Specifically, operators typically need to manually insert the inner tube of each flash filtration vial into the outer tube containing the sample, and apply pressure to complete the filtration. When dealing with dozens or even hundreds of samples, this repetitive manual operation is not only extremely inefficient, consuming a lot of manpower and time, but more seriously, the varying pressure and speed applied by different people, and even by different times, can lead to significant differences in filtration pressure and flow rate between different samples. Ultimately, this results in poor parallelism of the test data for the same batch of samples, introducing human error and affecting the accuracy and reliability of the results. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of low efficiency in liquid sample pretreatment in the prior art and to provide a batch pressure filtration device.

[0005] The present invention solves the above-mentioned technical problems through the following technical solution:

[0006] A batch pressure filtration device for batch processing of filtration sample bottles, the batch pressure filtration device comprising:

[0007] frame;

[0008] Multiple filtration injection bottles are provided, each including an outer tube, an inner tube, and a sealing element. The inner tube is inserted into the outer tube. The sealing element is located on the outer circumference of the inner tube and seals against the inner circumference of the outer tube. The inner tube has a vent hole on its wall, located above the sealing element and connected to external atmospheric pressure.

[0009] A sample support platform is disposed at the bottom end of the frame, and the sample support platform is used to support and position the outer tubes of multiple filter injection bottles arranged in an array;

[0010] A filter press drive mechanism, which is connected to the top of the frame;

[0011] A pressure plate is connected to the output end of the filter press drive mechanism and is located above the sample support stage. The filter press drive mechanism drives the pressure plate to move downward and press down, so that the lower surface of the pressure plate is used to abut against the top of the multiple inner tubes, so that the multiple inner tubes are respectively inserted into the multiple outer tubes.

[0012] In this technical solution, by setting up a sample support platform, a pressure filtration drive mechanism, and a pressure plate, simultaneous batch pressure filtration of multiple filtration sample bottles is achieved. By upgrading the traditional single-tube manual operation to automated batch processing, the efficiency of sample pretreatment is improved, the manual operation time and labor intensity are reduced, and the differences in filtration effect caused by inconsistent manual operation force and speed are avoided, ensuring the consistency of batch sample processing. Specifically, the outer tube is always connected to the atmospheric environment through an exhaust port, which effectively eliminates the pressure increase inside the outer tube caused by the inner tube being pressed down, thus ensuring the smooth progress of the filtration process and avoiding the risks of inaccurate sample volume, filter membrane damage due to pressure difference, and liquid leakage from the interface caused by pressure difference between the inside and outside. Furthermore, since the air pressure in the inner tube is always connected to atmospheric pressure during the inner tube pressing process, and the pressure remains constant at atmospheric pressure, the pressure plate only needs to maintain a constant pressure, without needing to counteract pressure changes in the inner tube, allowing for more precise operation during pressing.

[0013] Preferably, the sample support stage is provided with a plurality of arrayed positioning grooves, and a plurality of outer tubes are respectively inserted into the plurality of positioning grooves. The inner circumference of the positioning groove is provided with at least one pressing part that protrudes radially inward along the positioning groove. The plurality of pressing parts are spaced apart along the axial direction of the filter injection bottle, and the radial inner side of the pressing part abuts against the tube wall of the outer tube.

[0014] In this technical solution, a positioning groove is provided on the sample support stage to provide precise and stable positioning for the outer tube of the filter injection bottle. This ensures that each filter injection bottle remains in a fixed position during the filtration process, preventing tilting or movement. This guarantees that the pressure plate or pressure head can accurately and vertically align with the inner tube, avoiding bottle damage or seal failure caused by misalignment. Multiple axially spaced, radially protruding clamping parts within the positioning groove create a discontinuous, multi-point contact positioning structure. The gap between the peripheral wall of the positioning groove and the outer wall of the outer tube allows air to circulate during insertion and removal of the outer tube, effectively preventing vacuum adsorption effects caused by forming a sealed air cavity. This makes the insertion and removal of the filter injection bottle very smooth and effortless. Simultaneously, this structure, while providing sufficient positioning accuracy, reduces the machining accuracy requirements for the outer diameter of the filter injection bottle, improving the adaptability and fault tolerance of the device.

[0015] Preferably, the number of clamping parts is two;

[0016] And / or, the clamping part is semi-circular in radial cross-section along the inner tube.

[0017] In this technical solution, by setting two clamping parts, stable two-point positioning can be achieved with the simplest structure, reducing processing costs while ensuring effectiveness. By limiting the cross-section of the clamping part to a semi-circular shape, the smooth semi-circular contact surface can minimize the contact stress with the outer wall of the outer tube, avoiding scratches on the bottle.

[0018] Preferably, the lower surface of the pressure plate is provided with a plurality of pressure heads that match the array, and the plurality of pressure heads can simultaneously apply axial pressure to the plurality of inner tubes placed below them.

[0019] In this technical solution, by setting multiple independent pressure heads that match the array of filter injection bottles, it is ensured that the pressure is applied evenly and synchronously to each inner tube when the pressure plate is pressed down. This avoids the problem of uneven pressure distribution caused by the unevenness of a single large-area pressure plate or slight differences in the height of the inner tube. It ensures that the filtration pressure of each filter injection bottle is consistent with the environment, thereby ensuring the consistency of the filtration effect of the entire batch of samples.

[0020] Preferably, the batch filter press further includes a push-button switch located on the front of the frame and electrically connected to the filter press drive mechanism.

[0021] In this technical solution, by setting a button switch on the front, the operator does not need to go around to the side or back of the equipment to operate it, which improves the safety and convenience of operation.

[0022] Preferably, the batch pressure filtration device further includes a liquid distribution component, which has a receiving cavity for holding the sample to be filtered, and the liquid distribution component is provided with a plurality of liquid outlets communicating with the receiving cavity, the positions of the liquid outlets corresponding one-to-one with the array positions of the filter sample inlet bottles.

[0023] In this technical solution, by setting up a liquid distribution component, the automatic and synchronous addition of the sample to be filtered to multiple filtration injection bottles is realized. This not only further improves the automation and efficiency of the entire pretreatment process, but also ensures that the sample volume received by each filtration injection bottle is highly consistent, eliminating the deviation of subsequent detection data caused by manual sample addition errors from the source, and ensuring the parallelism and accuracy of the experiment.

[0024] Preferably, the liquid distribution assembly further includes multiple distribution tubes, which are respectively connected to multiple liquid outlets, and the diameter of the distribution tubes gradually decreases along the direction of liquid outflow.

[0025] In this technical solution, by setting a separatory tube with a gradually decreasing diameter, the phenomenon of droplets sticking to the tube wall at the tube opening can be reduced, ensuring that the sample can be cleanly and accurately separated from the outlet tube and fall into the filter sample bottle, thereby further improving the volume accuracy and consistency of the separation.

[0026] Preferably, the filtration sample bottle further includes a filter membrane, a support member, and a mounting member. The support member and the mounting member are both inserted into the inner tube and located at the inlet end of the inner tube. The support member has a hollow structure that extends through the axis. The filter membrane is disposed between the support member and the mounting member, and the filter membrane abuts against and is supported on the side of the support member facing the inlet end.

[0027] In this technical solution, by abutting and supporting the filter membrane against the support member, the filter membrane, mounting member, and support member form a robust filtration unit, facilitating overall installation and replacement, and effectively preventing the filter membrane from rupturing or deforming under pressure. The perforated structure of the support member provides an unobstructed flow channel for the filtrate, minimizing filtrate residue and pressure loss.

[0028] Preferably, the support member is a mesh structure or a structure with multiple support ribs.

[0029] Preferably, the inner circumferential side of the inlet end has an inwardly recessed annular groove, and both the support member and the mounting member are embedded in the annular groove.

[0030] Preferably, a slot is provided on the inner circumference of the inner tube, and a buckle matching the slot is provided on the mounting component. The inner tube and the mounting component are engaged by the buckle and the slot.

[0031] In this technical solution, the fixing component is fixed to the inner tube by the interlocking structure of the buckle and the slot, which realizes the rapid, accurate positioning and reliable installation of the filter membrane, and avoids the chemical contamination that may be introduced by the use of adhesives, ensuring the purity of the sample, and ensuring that the filter membrane will not shift or fall off due to liquid pressure during use.

[0032] Preferably, the bottom of the outer tube is provided with an upwardly protruding positioning structure, which is inserted into the mounting component.

[0033] In this technical solution, the axial positioning of the filter membrane assembly is achieved by the positioning structure at the bottom of the outer tube in conjunction with the fixing component, ensuring that it is in the optimal working position and guaranteeing proper filtration.

[0034] Preferably, along the axial direction of the inner tube, the distance between the vent hole and the inlet end of the inner tube is less than the depth of the outer tube.

[0035] In this technical solution, by setting the distance between the exhaust port and the inlet end to be less than the axial depth of the outer tube, it is ensured that the exhaust port is always located in the upper part of the inner cavity of the outer tube during the entire stroke of the inner tube inserted into the outer tube. This position design ensures that the exhaust port is always surrounded and protected by the tube wall of the outer tube during filtration and storage, which can isolate pollutants in the external environment and prevent the exhaust port from being accidentally blocked or contaminated. Thus, while balancing the pressure, it ensures the cleanliness of the device and the accuracy of the results.

[0036] The significant advantages of this invention are as follows: By incorporating a sample support platform, a pressure filtration drive mechanism, and a pressure plate, simultaneous batch pressure filtration of multiple filtration vials is achieved. Upgrading traditional single-tube manual operation to automated batch processing improves sample pretreatment efficiency, reduces manual operation time and labor intensity, and avoids differences in filtration effects caused by inconsistent manual operation force and speed, ensuring consistency in batch sample processing. Furthermore, the outer tube's interior is always connected to the atmospheric environment through an exhaust port, effectively eliminating the pressure increase inside the outer tube caused by the inner tube's downward pressure. This ensures smooth filtration and avoids risks such as inaccurate sample volume, filter membrane damage due to pressure differences, and liquid leakage from the interface caused by internal and external pressure differences. Simultaneously, because the inner tube's air pressure remains constant during downward pressure, only a constant pressure needs to be maintained when the pressure plate is pressed down, eliminating the need to counteract pressure changes in the inner tube and allowing for more precise operation during pressing. Attached Figure Description

[0037] Figure 1 This is a front view schematic diagram of a batch filter press device according to an embodiment of the present invention.

[0038] Figure 2 This is a side view (a) of a batch filter press device according to an embodiment of the present invention.

[0039] Figure 3 This is a side view (II) of a batch filter press device according to an embodiment of the present invention.

[0040] Figure 4 This is a side view (three) of a batch filter press device according to an embodiment of the present invention.

[0041] Figure 5 This is a front view schematic diagram of a liquid dispensing component and a sample support stage according to an embodiment of the present invention.

[0042] Figure 6 This is a front view schematic diagram (a) of the sample support stage and filter injection bottle according to an embodiment of the present invention.

[0043] Figure 7This is a front view (II) of the sample support stage and filter injection bottle according to an embodiment of the present invention.

[0044] Figure 8 This is a top view of a sample support platform and a filter injection bottle according to an embodiment of the present invention.

[0045] Figure 9 This is a partial cross-sectional structural diagram of the sample support stage and the filter injection bottle according to an embodiment of the present invention.

[0046] Figure 10 A schematic diagram of the structure of a filter sample inlet bottle according to an embodiment of this utility model (I).

[0047] Figure 11 A schematic diagram (II) of the structure of the filter sample inlet bottle according to an embodiment of this utility model.

[0048] Explanation of reference numerals in the attached figures:

[0049] 100 filtration sample vials

[0050] Outer tube 1

[0051] Positioning Structure 11

[0052] Inner tube 2

[0053] Upper seal 21

[0054] Lower seal 22

[0055] Exhaust port 201

[0056] Filter membrane 3

[0057] Installation part 41

[0058] Support component 42

[0059] 200 batch filter press units

[0060] Rack 5

[0061] Sample support stage 6

[0062] Clamping part 61

[0063] Pressure plate 7

[0064] Liquid dispensing assembly 8

[0065] Separator 81

[0066] Push button switch 9 Detailed Implementation

[0067] The present invention will be described more clearly and completely below with reference to the accompanying drawings, using a preferred embodiment.

[0068] like Figures 1-11 As shown, this embodiment provides a batch filter press device 200, which is used for batch processing of filter sample bottles 100, such as... Figures 1-4 As shown, the batch filter press device 200 includes a frame 5, multiple filter sample bottles 100, a sample support platform 6, a filter press drive mechanism, and a pressure plate 7. Figure 10 and Figure 11 As shown, the filter sample bottle 100 includes an outer tube 1, an inner tube 2, and a sealing element. The inner tube 2 is inserted into the outer tube 1. The sealing element 21 is located on the outer periphery of the inner tube 2 and seals against the inner periphery of the outer tube 1. The inner tube 2 has an exhaust port 201 on its wall, which is located above the sealing element and connected to the external atmospheric pressure. The sample support platform 6 is located at the bottom of the frame 5. The sample support platform 6 is used to support and position multiple outer tubes 1 of the filter sample bottles 100 arranged in an array. The pressure filter drive mechanism is connected to the top of the frame 5. The pressure plate 7 is connected to the output end of the pressure filter drive mechanism and is located above the sample support platform 6. The pressure filter drive mechanism drives the pressure plate 7 to move downward and press down, so that the lower surface of the pressure plate 7 abuts against the top of multiple inner tubes 2, so that multiple inner tubes 2 are inserted into multiple outer tubes 1 respectively. By setting the sample support platform 6, the pressure filter drive mechanism, and the pressure plate 7, the synchronous batch pressure filtration of multiple filter sample bottles 100 is realized. By upgrading the traditional single-tube manual operation to automated batch processing, the efficiency of sample pretreatment is improved, the time and labor intensity of manual operation are reduced, and the differences in filtration effect caused by inconsistent manual operation force and speed are avoided, ensuring the consistency of batch sample processing. Specifically, the outer tube 1 is always connected to the atmospheric environment through the vent 201, which effectively eliminates the pressure increase inside the outer tube 1 caused by the downward pressure of the inner tube 2. This ensures the smooth progress of the filtration process and avoids the risks of inaccurate sample injection volume, pressure damage to the filter membrane 3, and liquid leakage from the interface caused by the pressure difference between the inside and outside. Furthermore, since the air pressure in the inner tube 2 is always connected to atmospheric pressure during the downward pressure process, and the pressure remains constant at atmospheric pressure, the pressure plate 7 only needs to maintain a constant pressure when pressing down, without needing to counteract pressure changes in the inner tube 2, allowing for more precise operation during pressing down.

[0069] Specifically, such as Figures 6-9As shown, the sample support stage 6 is provided with multiple arrayed positioning grooves. Multiple outer tubes 1 are inserted into these grooves in an array. At least one pressing part 61 protruding radially inward along the inner circumference of each positioning groove is provided. These pressing parts 61 are spaced apart axially along the filter injection bottle 100, and their radially inner sides abut against the wall of the outer tube 1. By providing positioning grooves on the sample support stage 6, precise and stable positioning of the outer tube 1 of the filter injection bottle 100 is provided, ensuring that each filter injection bottle 100 remains in a fixed position during the filtration process and does not tilt or move. This ensures that the pressure plate 7 or pressure head can accurately and vertically align with the inner tube 2 to apply force, avoiding problems such as bottle damage or seal failure caused by misalignment. The multiple axially spaced, radially protruding pressing parts 61 within the positioning grooves create a discontinuous, multi-point contact positioning method. The gap between the peripheral wall of the positioning groove and the outer wall of the outer tube 1 allows air to circulate within the positioning groove when the outer tube 1 is inserted and removed, effectively avoiding the vacuum adsorption effect caused by the formation of a sealed air cavity. This makes the insertion and removal of the filter sample inlet bottle 100 very smooth and effortless. At the same time, this structure, while providing sufficient positioning accuracy, reduces the machining accuracy requirements for the outer diameter of the filter sample inlet bottle 100, improving the adaptability and fault tolerance of the device.

[0070] The array pattern and number of positioning grooves can be set according to actual needs, specifically according to the array pattern of the carrier components of the pressure filtration sample bottle commonly used in the prior art. Specifically, in this embodiment, as shown... Figure 8 As shown, the positioning grooves are arranged in a 5*10 rectangular array.

[0071] like Figure 5 As shown, when using the batch filter press device 200 to filter samples, first insert all the outer tubes 1 into the positioning grooves, then add liquid, and then put the inner tubes 2 into the outer tubes 1 without manually pressing them. After all the inner tubes 2 are placed, start the batch filter press device 200 to press down the pressure plate 7 to achieve filtration.

[0072] In this embodiment, as Figure 9 As shown, there are two clamping parts 61, and the radial cross-section of the clamping parts 61 is semi-circular along the inner tube 2. By setting two clamping parts 61, stable two-point positioning can be achieved with the simplest structure, reducing processing costs while ensuring effectiveness. By limiting the cross-section of the clamping parts 61 to semi-circular, the smooth semi-circular contact surface can minimize the contact stress with the outer wall of the outer tube 1, avoiding scratches on the bottle.

[0073] Furthermore, the clamping part 61 can also be configured as an elastic element. By configuring the clamping part 61 as an elastic element, it can effectively adapt to the small tolerances of the outer tube 1 size. The deformation of the clamping part 61 provides a uniform clamping force, preventing the outer tube 1 from rotating or floating during the filter pressing process, ensuring the reliability of positioning, and avoiding tube wall indentation or cracking that may be caused by rigid clamping.

[0074] In this embodiment, the lower surface of the pressure plate 7 is made flat and without any bumps or depressions, so that the pressure plate 7 is pressed down at a consistent height and with uniform pressure, thereby ensuring consistent filtration effect.

[0075] Of course, in other embodiments, the lower surface of the pressure plate 7 can be provided with multiple pressure heads that match the array, and the multiple pressure heads can synchronously apply axial pressure to the multiple inner tubes 2 placed below it. By setting multiple independent pressure heads that match the array of filter injection bottles 100, it is ensured that when the pressure plate 7 is pressed down, the pressure can be applied evenly and synchronously to each inner tube 2, avoiding the problem of uneven pressure distribution caused by the unevenness of a single large-area pressure plate 7 or slight differences in the height of the inner tubes 2. This further ensures that the filtration pressure and environment of each filter injection bottle 100 are consistent, thereby ensuring the consistency of the filtration effect of the entire batch of samples, which will not be elaborated further here.

[0076] In this embodiment, as Figures 1-4 As shown, the batch filter press device 200 also includes a push-button switch 9, which is located on the front of the frame 5 and electrically connected to the filter press drive mechanism. By placing the push-button switch 9 on the front, the operator does not need to go to the side or rear of the equipment to operate it, improving safety and convenience. Specifically, the push-button switch 9 is used to control the machine's on and off states, i.e., to control the downward and upward movement of the pressure plate 7. Simultaneously, a matching limiting component (not shown in the figure) is provided between the frame 5 and the pressure plate 7 to restrict the downward movement of the pressure plate 7. By setting the limiting component, excessive downward pressure on the pressure plate 7 is prevented from squeezing the filter sample bottle 100.

[0077] Meanwhile, in this embodiment, such as Figure 5 As shown, the batch pressure filtration device 200 also includes a liquid distribution component 8. The liquid distribution component 8 has a receiving cavity for holding the sample to be filtered and multiple outlets communicating with the receiving cavity. The positions of the outlets correspond one-to-one with the array positions of the filter injection bottles 100. By setting up the liquid distribution component 8, automatic and synchronous addition of the sample to be filtered to multiple filter injection bottles 100 is achieved. This not only further improves the automation and efficiency of the entire pretreatment process but also ensures that the sample volume received by each filter injection bottle 100 is highly consistent, eliminating the deviation in subsequent detection data caused by manual sample addition errors at the source, and ensuring the parallelism and accuracy of the experiment.

[0078] Specifically, the liquid distribution assembly 8 also includes multiple dispensing tubes 81, each connected to multiple liquid outlets. The diameter of the dispensing tubes 81 gradually decreases along the direction of liquid flow. By designing the dispensing tubes 81 with gradually decreasing diameters, the phenomenon of droplets adhering to the tube walls at the outlets can be reduced, ensuring that the sample can be cleanly and accurately separated from the outlets and fall into the filter sample bottle 100, thereby further improving the volume accuracy and consistency of the liquid dispensing.

[0079] Specifically, the number and array pattern of the dispensing tubes 81 can be completely consistent with the entire array of the filter injection bottles 100, or they can be matched with the overall array pattern of the filter injection bottles 100 in the form of small arrays. The number of filter injection bottles 100 in an array is an integer multiple of the dispensing tubes 81, so that when dispensing liquid, the entire array of filter injection bottles 100 can be filled by an integer number of batch liquid addition operations.

[0080] In this embodiment, as Figures 10-11 As shown, the filtration sample bottle is equipped with two sealing elements: an upper sealing element 21 near the outlet end of the inner tube and a lower sealing element 22 near the inlet end of the inner tube. In this embodiment, the vent hole being located above the sealing elements means that the vent hole is located above all the sealing elements, specifically above the upper sealing element 21. Furthermore, when there are more sealing elements, the vent hole is located above the sealing element closest to the outlet end. The filtration sample bottle 100 also includes a filter membrane 3, a support member 42, and a mounting member 41. Both the support member 42 and the mounting member 41 are inserted into the inner tube 2 and located at the inlet end of the inner tube 2. The support member 42 has an axially penetrating perforated structure. The filter membrane 3 is disposed between the support member 42 and the mounting member 41, and the filter membrane 3 is supported against the side of the support member 42 facing the inlet end. By supporting the filter membrane 3 against the support member 42, the filter membrane 3, the mounting member 41, and the support member 42 form a robust filtration unit, facilitating overall installation and replacement, and effectively preventing the filter membrane 3 from cracking or deforming under pressure. The hollow structure of the support member 42 provides an unobstructed flow channel for the filtrate, minimizing filtrate residue and pressure loss.

[0081] Specifically, the support member 42 can be a mesh structure or a structure with multiple support ribs.

[0082] In this embodiment, the inner circumferential side of the inlet end has an inwardly recessed annular groove, in which both the support member 42 and the mounting member 41 are embedded. Specifically, the mounting member 41 is a ring embedded in the annular groove, and a slot is provided on the inner circumferential side of the inner tube 2. The mounting member 41 is provided with a buckle that matches the slot, and the inner tube 2 and the mounting member 41 are engaged by the buckle and the slot. The fixing component is fixed to the inner tube 2 by the interlocking structure of the buckle and the slot, which realizes the rapid, accurate positioning and reliable installation of the filter membrane 3, avoids the chemical contamination that may be introduced by the use of adhesives, ensures the purity of the sample, and ensures that the filter membrane 3 will not shift or fall off due to liquid pressure during use.

[0083] Meanwhile, the bottom of the outer tube 1 is provided with an upwardly protruding positioning structure 11, which is inserted into the mounting component 41. Through the cooperation of the positioning structure 11 at the bottom of the outer tube 1 and the fixing component, the filter membrane 3 assembly is axially positioned to ensure that it is in the optimal working position and to ensure that filtration is in place.

[0084] Of course, in other embodiments, a buckle can be provided on the inner tube 2 and a slot can be provided on the mounting part 41 to achieve the buckle engagement between the inner tube 2 and the mounting part 41. In more embodiments, the mounting part 41 can also be fixed by other fixing methods in the prior art, such as bonding, etc., which will not be described in detail here.

[0085] In this embodiment, along the axial direction of the inner tube 2, the distance between the vent hole 201 and the inlet end of the inner tube 2 is less than the depth of the outer tube 1. By setting the distance between the vent hole 201 and the inlet end to be less than the axial depth of the outer tube 1, it is ensured that the vent hole 201 is always located at the upper part of the internal cavity of the outer tube 1 throughout the entire stroke of the inner tube 2 inserted into the outer tube 1. This positional design ensures that the vent hole 201 is always surrounded and protected by the tube wall of the outer tube 1 during filtration and storage, thus isolating it from contaminants in the external environment and preventing the vent hole 201 from being accidentally blocked or contaminated. This balances the pressure while ensuring the cleanliness of the device and the accuracy of the results.

[0086] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A batch pressure filtration device for batch processing of filtration sample bottles, characterized in that, The batch filter press device includes: frame; Multiple filtration injection bottles are provided, each including an outer tube, an inner tube, and a sealing element. The inner tube is inserted into the outer tube. The sealing element is located on the outer circumference of the inner tube and seals against the inner circumference of the outer tube. The inner tube has a vent hole on its wall, located above the sealing element and connected to external atmospheric pressure. A sample support platform is disposed at the bottom end of the frame, and the sample support platform is used to support and position the outer tubes of multiple filter injection bottles arranged in an array; A filter press drive mechanism, which is connected to the top of the frame; A pressure plate is connected to the output end of the filter press drive mechanism and is located above the sample support stage. The filter press drive mechanism drives the pressure plate to move downward and press down, so that the lower surface of the pressure plate is used to abut against the top of the multiple inner tubes, so that the multiple inner tubes are respectively inserted into the multiple outer tubes.

2. The batch filter press device as described in claim 1, characterized in that, The sample support stage is provided with a plurality of arrayed positioning grooves, and a plurality of outer tubes are respectively inserted into the plurality of positioning grooves. At least one pressing part is provided on the inner circumference of the positioning groove, which protrudes radially inward along the positioning groove. The plurality of pressing parts are spaced apart along the axial direction of the filter injection bottle, and the radial inner side of the pressing part abuts against the tube wall of the outer tube.

3. The batch filter press device as described in claim 2, characterized in that, The number of clamping parts is two; And / or, the clamping part is semi-circular in radial cross-section along the inner tube.

4. The batch filter press apparatus as described in claim 1, characterized in that, The lower surface of the pressure plate is provided with a plurality of pressure heads that match the array, and the plurality of pressure heads can simultaneously apply axial pressure to the plurality of inner tubes placed below them.

5. The batch filter press apparatus as described in claim 1, characterized in that, The batch filter press also includes a push-button switch, which is located on the front of the frame and is electrically connected to the filter press drive mechanism.

6. The batch filter press apparatus as described in claim 1, characterized in that, The batch pressure filtration device further includes a liquid distribution component, which has a receiving cavity for holding the sample to be filtered. The liquid distribution component is provided with multiple liquid outlets communicating with the receiving cavity, and the positions of the liquid outlets correspond one-to-one with the array positions of the filter sample inlet bottles.

7. The batch filter press apparatus as described in claim 6, characterized in that, The liquid distribution assembly also includes multiple distribution tubes, which are respectively connected to multiple liquid outlets. The diameter of the distribution tubes gradually decreases along the direction of liquid outflow.

8. The batch filter press apparatus according to any one of claims 1-7, characterized in that, The filtration sample bottle also includes a filter membrane, a support member, and a mounting member. The support member and the mounting member are both inserted into the inner tube and located at the inlet end of the inner tube. The support member has a hollow structure that extends through the axis. The filter membrane is disposed between the support member and the mounting member, and the filter membrane abuts against and is supported on the side of the support member facing the inlet end.

9. The batch filter press apparatus as described in claim 8, characterized in that, The support member is a mesh structure or a structure with multiple support ribs; And / or, the inner circumferential side of the inlet end has an inwardly recessed annular groove, and both the support member and the mounting member are embedded in the annular groove; And / or, a slot is provided on the inner circumferential side of the inner tube, and a buckle matching the slot is provided on the mounting component, and the inner tube and the mounting component are engaged by the buckle and the slot. And / or, the bottom of the outer tube is provided with an upwardly protruding positioning structure, which is inserted into the mounting component.

10. The batch filter press apparatus according to any one of claims 1-7, characterized in that, Along the axial direction of the inner tube, the distance between the vent hole and the inlet end of the inner tube is less than the depth of the outer tube.

Images