Ion chromatography pretreatment filtering device

Abstract

The utility model provides an ion chromatography pretreatment filter device which comprises an operation table, a filter screen and a filter screen, the clamp comprises a rotating disc and a rotating device, the rotating device is used for driving the rotating disc to rotate, a plurality of first mounting cavities and second mounting cavities which are continuously arranged are evenly formed in the side face of the rotating disc around the center of the rotating disc, the number of the first mounting cavities is equal to that of the second mounting cavities, and the first mounting cavities are used for mounting injection type filters containing samples to be detected; the second mounting cavity is used for mounting a centrifugal tube, the injection end of the injection type filter in the first mounting cavity is opposite to the opening end of the centrifugal tube in the corresponding second mounting cavity in the radial direction of the turntable, and the pressing end of the injection type filter extends out of the outer side of the circumferential surface of the turntable; the pressing device comprises a lifting device and a pressing piece, and the lifting device is used for driving the pressing piece to apply pressure to the pressing end of the injection type filter. Through the combination of the rotating device and the pressing device, automatic rotation and pressing are realized, the sample filtering efficiency is improved, and the labor intensity of workers is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of ion chromatography analysis, in particular to an ion chromatography pre-treatment filtering device. Background Art

[0002] Ion chromatography is an analytical technique that combines the high-efficiency separation technology of chromatography with the automatic detection technology of ions. It uses ion exchange resin as the stationary phase and electrolyte solution as the mobile phase, and usually uses a conductivity detector for detection. As the eluent flows, the ions in the sample and the exchange groups on the resin continuously undergo an exchange-elution process, and are eventually carried to the detector by the eluent to form a Gaussian distribution chromatographic peak.

[0003] In ion chromatography analysis, the sample to be tested needs to be pre-treated to filter out possible inorganic pollutants or impurity particles that affect the analysis process, so as to obtain accurate chromatographic peak results while protecting the instrument. Therefore, in ion chromatography analysis, needle filters are used to filter sample solutions, which is an important step in the pre-treatment process.

[0004] Currently, in laboratories, samples to be tested by ion chromatography require the use of disposable medical syringes, needle filters, centrifuge tubes, etc. for filtration. The process is generally as follows: first, firmly combine the needle filter with the disposable medical syringe, then transfer the prepared sample solution into the disposable medical syringe, and finally press the handle of the disposable medical syringe to filter the sample solution into a clean centrifuge tube. The above process can only filter a single sample at a time, with low filtration efficiency, time-consuming and labor-intensive, and the risk of human contamination. Utility Model Content

[0005] In view of this, the utility model proposes an ion chromatography pre-treatment filtering device to solve the problem that manual filtering of samples to be tested by ion chromatography is time-consuming, labor-intensive and has low filtering efficiency.

[0006] The technical solution of the utility model is achieved in this way:

[0007] The utility model provides an ion chromatography pre-treatment filtering device, comprising:

[0008] Operation table;

[0009] A fixture comprises a turntable and a rotating device, wherein the turntable is arranged sideways above an operating table, one end of the rotating device is fixedly connected to the operating table, and the other end is used to drive the turntable to rotate, a plurality of first installation cavities and second installation cavities arranged continuously are evenly arranged on the side of the turntable around the center of the turntable, the number of the first installation cavities and the second installation cavities is equal, the first installation cavity is used to install an injection filter containing a sample to be tested, and the second installation cavity is used to install a centrifuge tube, the injection end of the injection filter in the first installation cavity is opposite to the opening end of the centrifuge tube in the corresponding second installation cavity in the radial direction of the turntable, and the pressing end of the injection filter extends out of the outer side of the circumference of the turntable;

[0010] The pressing device comprises a lifting device and a pressing piece. The lifting device is fixedly arranged on an operating table and is used to drive the pressing piece to apply pressure to the pressing end of the injection filter.

[0011] On the basis of the above technical solution, preferably, quick-release buckles are provided in both the first installation cavity and the second installation cavity, and the quick-release buckles are used for detachably fixing the injection filter and the centrifuge tube.

[0012] Further, preferably, the turntable comprises a disk body, an outer annular cylinder and an inner annular cylinder, the outer annular cylinder and the inner annular cylinder are fixedly arranged concentrically on the side of the disk body, and the first installation cavity and the second installation cavity are evenly distributed in a cavity enclosed by the disk body, the outer annular cylinder and the inner annular cylinder;

[0013] A first mounting hole is provided on the outer annular cylinder corresponding to the first mounting cavity, and the first mounting hole is used to install a syringe. A second mounting hole is provided on the inner annular cylinder corresponding to the first mounting cavity, and the second mounting hole is used for the injection end of the injection filter to pass through. An injection hole corresponding to the open end of the centrifuge tube is provided on the inner annular cylinder corresponding to the second mounting cavity, and the first mounting hole, the second mounting hole and the injection hole are coaxially arranged.

[0014] On the basis of the above technical solution, preferably, the injection filter includes a syringe, a piston rod and a filter head, one end of the piston rod is slidably arranged in the syringe, and the other end extends out of the outside of the opening end of the syringe, the syringe is located in the first mounting cavity and is fixed by a quick-release buckle, the open end of the syringe moves through the first mounting hole and extends to the outside of the outer annular cylinder, the liquid outlet end of the syringe is detachably connected to the filter head, and an injection head passing through the second mounting hole is provided at the end of the filter head away from the syringe.

[0015] Preferably, the diameter of the filter head is less than or equal to the diameter of the syringe.

[0016] On the basis of the above technical solution, preferably, a third mounting hole is opened on the outer annular cylinder corresponding to the second mounting cavity, the centrifuge tube is located in the second mounting cavity and is fixed by a quick-release buckle, the open end of the centrifuge tube is connected to the injection hole, and the closed end of the centrifuge tube moves through the third mounting hole.

[0017] Further, preferably, the outer wall of the inner annular cylinder is provided with an annular limiting groove coaxial with the injection hole, and the open end of the centrifuge tube is inserted into the annular limiting groove.

[0018] Preferably, the lifting device includes a telescopic element and a connecting rod, the fixed end of the telescopic element is fixedly arranged on the operating table, the telescopic end of the telescopic element is vertically upward, one end of the connecting rod is horizontally fixedly connected to the telescopic end of the telescopic element, and the other end of the connecting rod is vertically fixedly connected to the pressing piece, and the length direction of the pressing piece is parallel to the telescopic direction of the telescopic element.

[0019] Preferably, the rotating device includes a rotating motor and a support seat, the rotating motor is fixedly arranged on the operating table, the output shaft of the rotating motor is fixedly connected to the center of the turntable, the support seat is located directly below the turntable and is fixedly connected to the operating table, and the top surface of the support seat is in contact with the outer peripheral surface of the turntable.

[0020] Compared with the prior art, the utility model has the following beneficial effects:

[0021] (1) Through multiple installation cavities arranged in series, multiple injection filters and centrifuge tubes can be installed at the same time. The rotation of the turntable allows these filters and centrifuge tubes to perform filtering operations in sequence, greatly improving the filtering efficiency. The combination of the rotating device and the pressing device realizes automatic rotation and pressing, reducing the frequency and intensity of manual operation, thereby reducing the intensity of manual labor.

[0022] (2) Through the quick-release buckle, operators can quickly install and remove the syringe filter and centrifuge tube, thereby reducing replacement time and improving overall operating efficiency. At the same time, the quick-release buckle can firmly fix the syringe filter and centrifuge tube to prevent shaking or falling off during the filtration process, ensuring that the sample liquid can be accurately injected into the centrifuge tube.

[0023] (3) By coaxially arranging the first mounting hole, the second mounting hole and the injection hole, it can be ensured that the injection filter and the centrifuge tube are coaxially arranged, so that the sample reagent filtered by the injection filter can be accurately injected into the centrifuge tube, thereby improving the reliability of the device.

[0024] (4) An annular limiting groove coaxial with the injection hole is provided on the outer wall of the inner annular cylinder, and the open end of the centrifuge tube is inserted into the annular limiting groove. Therefore, when the centrifuge tube is installed in the second installation cavity, the open end of the centrifuge tube can be directly inserted into the annular limiting groove after passing through the third installation hole and the quick release buckle in sequence. At this time, the annular limiting groove can limit the axial direction of the centrifuge tube. At the same time, the annular limiting groove can also limit the open end of the centrifuge tube radially to prevent the centrifuge tube from swinging during the rotation of the turntable, so that the open end of the centrifuge tube and the injection hole are misaligned, ensuring that each injection filter and the centrifuge tube are coaxially aligned one by one to achieve the accuracy of sample injection. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a three-dimensional structural schematic diagram of the ion chromatography pre-treatment filtering device disclosed in the utility model;

[0027] Figure 2 It is a three-dimensional structural schematic diagram of the turntable disclosed in the utility model;

[0028] Figure 3 This is a schematic diagram of the state of the ion chromatography pre-treatment filtration device disclosed in the utility model when it starts working;

[0029] Figure 4 This is a schematic diagram of the working state of the ion chromatography pre-treatment filtering device disclosed in the utility model when it rotates 60° for the first time;

[0030] Figure 5 It is a schematic diagram of the working state of the ion chromatography pre-treatment filtering device disclosed in the utility model when it rotates 60° for the second time;

[0031] Reference numerals:

[0032] 1. Operating table; 2. Clamp; 21. Turntable; 22. Rotating device; 211. First mounting cavity; 212. Second mounting cavity; 3. Injection filter; 4. Centrifuge tube; 5. Pressing device; 51. Lifting device; 52. Pressing piece; S. Quick release buckle; 213. Disc; 214. Outer annular cylinder; 215. Inner annular cylinder; 2141. First mounting hole; 2151. Second mounting hole; 2152. Injection hole; 31. Syringe; 32. Piston rod; 33. Filter head; 34. Injection head; 2142. Third mounting hole; 2153. Annular limit groove; 511. Telescopic element; 512. Connecting rod; 221. Rotating motor; 222. Support seat. DETAILED DESCRIPTION

[0033] The following will be combined with the implementation of the utility model to clearly and completely describe the technical solutions in the implementation of the utility model. Obviously, the described implementation is only a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] like Figure 1 As shown, combined Figure 2 The utility model discloses an ion chromatography pre-treatment filtering device, comprising an operating table 1, a fixture 2 and a mounting device.

[0035] The operating table 1 serves as the foundation of the entire device and provides stable support.

[0036] The fixture 2 includes a turntable 21 and a rotating device 22. The turntable 21 is arranged sideways above the operating table 1. A plurality of first installation cavities 211 and second installation cavities 212 are evenly arranged on the side of the turntable 21 around the center of the turntable 21. The number of the first installation cavities 211 and the second installation cavities 212 is equal. The first installation cavity 211 is used to install an injection filter 3 containing a sample to be tested, and the second installation cavity 212 is used to install a centrifuge tube 4. The injection end of the injection filter 3 in the first installation cavity 211 is opposite to the opening end of the centrifuge tube 4 in the corresponding second installation cavity 212 in the radial direction of the turntable 21, ensuring that the sample reagent can be filtered from the injection filter 3 and then smoothly injected into the centrifuge tube 4. The pressing end of the injection filter 3 extends out of the outer surface of the turntable 21 to facilitate the pressing device 5 to apply pressure.

[0037] The pressing device 5 includes a lifting device 51 and a pressing piece 52. The lifting device 51 is fixedly arranged on the operating table 1, and is used to drive the pressing piece 52 to move up and down. Under the action of the lifting device 51, the pressing piece 52 applies pressure to the pressing end of the injection filter 3, pushing the sample reagent through the injection filter 3 into the centrifuge tube 4.

[0038] One end of the rotating device 22 is fixedly connected to the operating table 1, and the other end is used to drive the turntable 21 to rotate. By rotating it sequentially by a certain angle, different installation cavities can be rotated to the working position in sequence. Specifically, when the pressing end of the injection filter 3 in the first installation cavity 211 is vertically upward and facing the pressing piece 52, the centrifuge tube 4 in the second installation cavity 212 opposite to the first installation cavity 211 is in a vertical state. At this time, the pressing piece 52 applies downward pressure to the pressing end of the injection filter 3, pushing the sample reagent through the injection filter 3 to enter the centrifuge tube 4. When the centrifuge tube 4 completes filtration and injection, the turntable 21 rotates a certain angle to keep the next centrifuge tube 4 in a vertical state, and the filtration and injection operation can continue. At the same time, the previous centrifuge tube 4 that has been injected with the reagent can be taken out from the turntable 21. By repeating the above steps, the filtration operation of all samples can be completed in sequence.

[0039] Through the multiple installation cavities arranged in series, multiple injection filters 3 and centrifuge tubes 4 can be installed at the same time. The rotating disk 21 rotates to make these filters and centrifuge tubes 4 perform filtering operations in sequence, which greatly improves the filtering efficiency. The combination of the rotating device 22 and the pressing device 5 realizes automatic rotation and pressing, reduces the frequency and intensity of manual operation, and thus reduces the labor intensity.

[0040] In this embodiment, the number of the injection filters 3 and the number of the centrifuge tubes 4 are both set to 3, and may also be set to more than 3.

[0041] In order to enable the syringe filter 3 and the centrifuge tube 4 to be flexibly and quickly disassembled and assembled in the above-mentioned installation cavity, in this embodiment, quick-release buckles S are provided in both the first installation cavity 211 and the second installation cavity 212, and the quick-release buckles S are used to detachably fix the syringe filter 3 and the centrifuge tube 4. It should be noted that the quick-release buckle S used in this embodiment is a conventional structural form in the prior art, which has the function of quick locking and releasing, and can be, for example, a spring buckle, a snap ring or other forms of fasteners, which are not limited in this utility model.

[0042] The operator can quickly install and remove the injection filter 3 and the centrifuge tube 4 through the quick release buckle S, thereby reducing the replacement time and improving the overall operation efficiency. At the same time, the quick release buckle S can firmly fix the injection filter 3 and the centrifuge tube 4 to prevent shaking or falling off during the filtration process, ensuring that the sample liquid can be accurately injected into the centrifuge tube 4.

[0043] As some preferred implementation modes, the turntable 21 disclosed in this embodiment includes a disk body 213, an outer annular cylinder 214 and an inner annular cylinder 215, and the outer annular cylinder 214 and the inner annular cylinder 215 are concentrically fixed on the side of the disk body 213, and the first installation cavity 211 and the second installation cavity 212 are evenly distributed in the cavity formed by the disk body 213, the outer annular cylinder 214 and the inner annular cylinder 215.

[0044] With the above-mentioned structural manner, the concentric design of the outer annular cylinder 214 and the inner annular cylinder 215 makes the entire turntable 21 compact in structure and rational in layout, which helps to realize the miniaturization of the device and the efficient use of space.

[0045] The outer annular cylinder 214 corresponding to the first installation cavity 211 is provided with a first installation hole 2141, and the first installation hole 2141 is used to install a syringe. The inner annular cylinder 215 corresponding to the first installation cavity 211 is provided with a second installation hole 2151, and the second installation hole 2151 is used for the injection end of the injection filter 3 to pass through. The axis of the first installation hole 2141 and the second installation hole 2151 is flush with the radial direction of the disk body 213. The inner annular cylinder 215 corresponding to the second installation cavity 212 is provided with an injection hole 2152 corresponding to the open end of the centrifuge tube 4. The first installation hole 2141, the second installation hole 2151 and the injection hole 2152 are coaxially arranged. With this arrangement, it can be ensured that the injection filter 3 and the centrifuge tube 4 are coaxially arranged, so that the sample reagent filtered by the injection filter 3 can be accurately injected into the centrifuge tube 4, thereby improving the reliability of the device.

[0046] This embodiment shows a preferred implementation of the injection filter 3. Specifically, the injection filter 3 includes a syringe 31, a piston rod 32 and a filter head 33. One end of the piston rod 32 is slidably arranged in the syringe 31, and the other end extends out of the open end of the syringe 31. The piston rod 32 is used to push the sample through the filter head 33. The syringe 31 is located in the first mounting cavity 211 and is fixed by a quick-release buckle S. The syringe 31 is used to accommodate the sample. The open end of the syringe 31 is movable through the first mounting hole 2141 and extends to the outside of the outer annular cylinder 214. The liquid outlet end of the syringe 31 is detachably connected to the filter head 33. The filter head 33 is used to implement the filtering operation of the sample. The end of the filter head 33 away from the syringe 31 is provided with an injection head 34 passing through the second mounting hole 2151. The injection head 34 is used to pass through the second mounting hole 2151 to implement sample injection.

[0047] By adopting the above technical solution, after the entire injection filter 3 is fixed in the first mounting cavity 211, the injection head 34 passes through the second mounting hole 2151, and the syringe 31 is fixed by the quick-release buckle S. The open end of the syringe 31 passes through the first mounting hole 2141 and extends to the outside of the outer annular cylinder 214. The pressing end of the piston rod 32 is located on the outside of the turntable 21. Thus, by applying pressure to the pressing end of the piston rod 32 through the pressing piece 52, the sample reagent in the syringe 31 can be filtered through the filter head 33 and then injected into the centrifuge tube 4 by the injection head 34, thereby completing the sample filtering operation.

[0048] Preferably, the diameter of the filter head 33 is less than or equal to the diameter of the syringe 31. With this arrangement, after the injection filter 3 is loaded with the sample to be tested, the injection filter 3 can be passed from the outside of the turntable 21 through one end of the injection head 34 through the first mounting hole 2141, the quick release buckle S and the second mounting hole 2151. When the filter head 33 is pressed against the outer wall of the inner annular cylinder 215, the entire injection filter 3 is placed in place in the first mounting cavity 211, and then the syringe 31 is locked by the quick release buckle S. Since the open end of the syringe 31 is constrained by the first mounting hole 2141 and the injection head 34 is constrained by the second mounting hole 2151, the entire injection filter 3 is constrained and fixed in the radial direction of the turntable 21. At the same time, the entire injection filter 3 can be easily and quickly installed or disassembled in the first mounting cavity 211, and the operation efficiency is high.

[0049] In order to facilitate the installation of the centrifuge tube 4 in the second installation cavity 212, a third installation hole 2142 is provided on the outer annular cylinder 214 corresponding to the second installation cavity 212 in this embodiment. The centrifuge tube 4 is located in the second installation cavity 212 and fixed by a quick release buckle S. The open end of the centrifuge tube 4 is connected to the injection hole 2152, and the closed end of the centrifuge tube 4 movably passes through the third installation hole 2142. According to this arrangement, when the centrifuge tube 4 is installed, the open end of the centrifuge tube 4 is sequentially passed through the third installation hole 2142 and the quick release buckle S and docked with the injection port. When the centrifuge tube 4 is installed in place, the quick release buckle S can be used to achieve fixed installation of the centrifuge tube 4. Due to the constraints of the third installation hole 2142 and the quick release buckle S, the centrifuge tube 4 and the injection filter 3 can be ensured to be coaxially arranged.

[0050] As some preferred embodiments, the outer wall of the inner annular cylinder 215 is provided with an annular limiting groove 2153 coaxial with the injection hole 2152, and the open end of the centrifuge tube 4 is inserted into the annular limiting groove 2153. With this arrangement, when the centrifuge tube 4 is installed in the second installation cavity 212, the open end of the centrifuge tube 4 can be directly inserted into the annular limiting groove 2153 after passing through the third installation hole 2142 and the quick release buckle S in sequence. At this time, the annular limiting groove 2153 can limit the axial direction of the centrifuge tube 4. At the same time, the annular limiting groove 2153 can also limit the open end of the centrifuge tube 4 radially, preventing the centrifuge tube 4 from swinging during the rotation of the turntable 21, so that the open end of the centrifuge tube 4 and the injection hole 2152 are misaligned, ensuring that each injection filter 3 and the centrifuge tube 4 are coaxially aligned one by one, and achieving the accuracy of sample injection.

[0051] The lifting device 51 disclosed in this embodiment includes a telescopic element 511 and a connecting rod 512. The fixed end of the telescopic element 511 is fixedly arranged on the operating table 1, and the telescopic end of the telescopic element 511 is vertically upward. One end of the connecting rod 512 is horizontally fixedly connected to the telescopic end of the telescopic element 511, and the other end of the connecting rod 512 is vertically fixedly connected to the pressing member 52, and the length direction of the pressing member 52 is parallel to the telescopic direction of the telescopic element 511. Through the vertical telescopic movement of the telescopic element 511, the pressing member 52 can be quickly lifted and lowered, and the pressing operation is efficient, and no manual operation is required, which saves labor intensity.

[0052] The telescopic element 511 of this embodiment may be a pneumatic cylinder, an oil cylinder or an electric push rod.

[0053] In this embodiment, the rotating device 22 includes a rotating motor 221 and a support seat 222. The rotating motor 221 is fixedly arranged on the operating table 1. The output shaft of the rotating motor 221 is fixedly connected to the center of the turntable 21. The support seat 222 is located directly below the turntable 21 and is fixedly connected to the operating table 1. The top surface of the support seat 222 is in contact with the outer peripheral surface of the turntable 21. Thus, the support seat 222 provides rotational support for the turntable 21 to ensure the stability of the turntable 21 during rotation.

[0054] The working principle of the utility model is:

[0055] A plurality of syringe filters 3 containing samples to be tested are sequentially installed in each first installation cavity 211, and a corresponding number of centrifuge tubes 4 are sequentially installed in each second installation cavity 212. Figure 3 and 5As shown, by rotating the turntable 21, the pressing end of the first injection filter 3 is vertically facing upward, and the pressing member 52 is driven downward by the lifting device 51 to apply pressing force to the pressing end of the first injection filter 3, so that the sample reagent is pushed through the injection filter 3 and injected into the centrifuge tube 4 directly below. When the centrifuge tube 4 completes the filtration and injection, the turntable 21 rotates a certain angle to keep the next centrifuge tube 4 in a vertical state, and the filtration and injection operation can continue. At the same time, the previous centrifuge tube 4 that has been injected with the reagent can be taken out from the turntable 21. By repeating the above steps, the filtration operation of all samples can be completed in sequence.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An ion chromatography pre-treatment filtration device, characterized in that: include: Operation table (1); A fixture (2) comprises a turntable (21) and a rotating device (22), wherein the turntable (21) is arranged sideways above an operating table (1), one end of the rotating device (22) is fixedly connected to the operating table (1), and the other end is used to drive the turntable (21) to rotate, a plurality of first installation cavities (211) and second installation cavities (212) are evenly arranged on the side of the turntable (21) around the center of the turntable (21), the number of the first installation cavities (211) and the number of the second installation cavities (212) are equal, the first installation cavity (211) is used to install an injection filter (3) containing a sample to be tested, and the second installation cavity (212) is used to install a centrifuge tube (4), the injection end of the injection filter (3) in the first installation cavity (211) is opposite to the opening end of the centrifuge tube (4) in the corresponding second installation cavity (212) in the radial direction of the turntable (21), and the pressing end of the injection filter (3) extends outside the peripheral surface of the turntable (21); The pressing device (5) comprises a lifting device (51) and a pressing piece (52); the lifting device (51) is fixedly arranged on the operating table (1) and is used to drive the pressing piece (52) to apply pressure to the pressing end of the injection filter (3).

2. The ion chromatography pre-treatment filtration device according to claim 1, characterized in that: The first installation cavity (211) and the second installation cavity (212) are both provided with quick-release buckles (S), and the quick-release buckles (S) are used to detachably fix the injection filter (3) and the centrifuge tube (4).

3. The ion chromatography pre-treatment filtration device according to claim 2, characterized in that: The rotating disk (21) comprises a disk body (213), an outer annular cylinder (214) and an inner annular cylinder (215); the outer annular cylinder (214) and the inner annular cylinder (215) are coaxially fixedly arranged on the side of the disk body (213); the first installation cavity (211) and the second installation cavity (212) are evenly distributed in a cavity enclosed by the disk body (213), the outer annular cylinder (214) and the inner annular cylinder (215); The outer annular cylinder (214) corresponding to the first installation cavity (211) is provided with a first installation hole (2141), and the first installation hole (2141) is used to install a syringe. The inner annular cylinder (215) corresponding to the first installation cavity (211) is provided with a second installation hole (2151), and the second installation hole (2151) is used for the injection end of the injection filter (3) to pass through. The inner annular cylinder (215) corresponding to the second installation cavity (212) is provided with an injection hole (2152) corresponding to the open end of the centrifuge tube (4), and the first installation hole (2141), the second installation hole (2151) and the injection hole (2152) are coaxially arranged.

4. The ion chromatography pre-treatment filtration device according to claim 3, characterized in that: The injection filter (3) comprises a syringe (31), a piston rod (32) and a filter head (33); one end of the piston rod (32) is slidably disposed in the syringe (31), and the other end extends out of the open end of the syringe (31); the syringe (31) is located in the first mounting cavity (211) and is fixed by a quick-release buckle (S); the open end of the syringe (31) movably passes through the first mounting hole (2141) and extends to the outside of the outer annular cylinder (214); the liquid outlet end of the syringe (31) is detachably connected to the filter head (33); and an injection head (34) passing through the second mounting hole (2151) is provided at one end of the filter head (33) away from the syringe (31).

5. The ion chromatography pre-treatment filtration device according to claim 4, characterized in that: The diameter of the filter head (33) is smaller than or equal to the diameter of the syringe (31).

6. The ion chromatography pre-treatment filtration device according to claim 3, characterized in that: A third mounting hole (2142) is provided on the outer annular cylinder (214) corresponding to the second mounting cavity (212); the centrifuge tube (4) is located in the second mounting cavity (212) and is fixed by a quick-release buckle (S); the open end of the centrifuge tube (4) is connected to the injection hole (2152); and the closed end of the centrifuge tube (4) is movable through the third mounting hole (2142).

7. The ion chromatography pre-treatment filtration device according to claim 6, characterized in that: The outer wall of the inner annular cylinder (215) is provided with an annular limiting groove (2153) coaxial with the injection hole (2152), and the open end of the centrifuge tube (4) is inserted into the annular limiting groove (2153).

8. The ion chromatography pre-treatment filtration device according to claim 1, characterized in that: The lifting device (51) comprises a telescopic element (511) and a connecting rod (512); the fixed end of the telescopic element (511) is fixedly arranged on the operating table (1); the telescopic end of the telescopic element (511) is vertically upward; one end of the connecting rod (512) is horizontally fixedly connected to the telescopic end of the telescopic element (511); the other end of the connecting rod (512) is vertically fixedly connected to the pressing piece (52); and the length direction of the pressing piece (52) is parallel to the telescopic direction of the telescopic element (511).

9. The ion chromatography pre-treatment filtration device according to claim 8, characterized in that: The rotating device (22) comprises a rotating motor (221) and a support seat (222); the rotating motor (221) is fixedly arranged on the operating table (1); the output shaft of the rotating motor (221) is fixedly connected to the center of the turntable (21); the support seat (222) is located directly below the turntable (21) and is fixedly connected to the operating table (1); the top surface of the support seat (222) is in contact with the outer peripheral surface of the turntable (21).

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