A post-pump rinsing device for ion chromatograph

Abstract

The utility model relates to environmental sample analysis device field discloses a pump post flush device for ion chromatograph, including base, the top side rear end of base is fixedly connected with high pressure pump, the input fixedly connected with showering liquid container of high pressure pump, the output of high pressure pump is installed with three -way valve no.

Description

Technical Field

[0001] This utility model relates to the field of environmental sample analysis devices, and in particular to a post-pump rinsing device for ion chromatographs. Background Technology

[0002] Chromatography, also known as layer chromatography or chromatographic analysis, is a physicochemical analytical method that utilizes the differences in the interaction forces between different solutes and the stationary and mobile phases. As the two phases move relative to each other, the solutes undergo multiple equilibrations between them, ultimately achieving separation. Ion chromatography is a type of chromatographic instrument, a form of high-performance liquid chromatography (HPLC), hence also called high-performance ion chromatography or modern ion chromatography. It differs from traditional ion-exchange column chromatography primarily in that the resin has a high degree of cross-linking and a low exchange capacity, resulting in a very small injection volume. The eluent is typically delivered using a plunger pump, and online automatic continuous conductivity monitoring of the eluent is usually performed.

[0003] After use, ion chromatographs often require flushing of the post-pump area to prevent residual liquid crystals from clogging the flow path. However, existing flushing structures generally adopt a fixed integrated storage tank design, and flushing solution replenishment requires manual addition through an open injection port. When switching to different types of flushing solutions, residual liquid is easily left on the tank wall. Each time the flushing solution is changed, it needs to be emptied, cleaned, and refilled. Furthermore, existing flushing structures often lack the function of drying after flushing, which can cause inconvenience to the maintenance of ion chromatographs. In order to address this technical problem, this application proposes a post-pump flushing device for ion chromatographs. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a post-pump rinsing device for ion chromatographs. The process of changing the rinsing solution is simple and quick, avoids cross-contamination between different rinsing solutions, and allows the liquid flow path to be air-dried after rinsing. It is suitable for scenarios that require long-term shutdown.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a post-pump rinsing device for an ion chromatograph, comprising a base, a high-pressure pump fixedly connected to the rear end of the top side of the base, an eluent container fixedly connected to the input end of the high-pressure pump, a three-way valve I installed at the output end of the high-pressure pump, the three-way valve I having two input ends, one of which is fixedly connected to the output end of the high-pressure pump, and the other input end is fixedly connected to a common pipeline, the input end of the common pipeline having a three-way valve II installed, the three-way valve II having two input ends, one of which is fixedly connected to a rinsing fluid pipeline, and the other input end is fixedly connected to an air inlet pipeline, the input end of the rinsing fluid pipeline being fixedly connected to a rinsing pump, the input end of the rinsing pump being fixedly connected to a platform, the top of the platform being connected to the rinsing fluid container via a replacement assembly, and the input end of the air inlet pipeline being connected to a filter tube via a disassembly assembly, the filter tube having an internal filter air inlet assembly.

[0006] Furthermore, the replacement assembly includes a water tank fixedly connected inside the base and a container cap threadedly connected to the opening of the flushing liquid container. An opening cone is fixedly connected to the bottom center of the water tank, and a sealing sheet is fixedly connected to the inner center of the container cap.

[0007] Furthermore, the assembly includes an installation tube fixedly connected to the inlet end of the air inlet duct, an installation ring rotatably connected to the end of the installation tube away from the air inlet duct, four T-shaped grooves being provided on the inner walls of both the installation tube and the installation ring, and four T-shaped protrusions being fixedly connected to the outer wall of the filter tube, the T-shaped protrusions being slidably connected inside the T-shaped grooves.

[0008] Furthermore, four pin seats are fixedly connected to the outer wall of the end of the mounting pipe away from the air inlet pipe. Each of the four pin seats has a pin slidably connected inside. Each of the four pin seats has a second buckle on one side. The second buckle is fixedly connected to the outer wall of the mounting pipe. Four pin hole seats are fixedly connected to the outer wall of the mounting ring. Each of the four pin hole seats has an insertion hole inside. One end of the pin is inserted into the insertion hole, and the other end is snapped into the second buckle.

[0009] Furthermore, the air inlet filter assembly includes a filter layer fixedly connected to the input end of the filter tube and an electric fan installed inside the air inlet duct. Two wind baffles are fixedly connected inside the filter tube. A rotating shaft is rotatably connected to the adjacent side of the two wind baffles. Both ends of the rotating shaft are fixedly connected to a cylinder frame. A filter cylinder is rotatably connected to the adjacent side of the two cylinder frames.

[0010] Furthermore, a buckle is fixedly connected to the top side of the platform, and a slot is provided on the outer wall of the rinsing liquid container, with the buckle engaging inside the slot.

[0011] Furthermore, the output end of the three-way valve one is fixedly connected to a component housing, the output end of the component housing is fixedly connected to a three-way valve three, the three-way valve three has two output ends, one of which is fixedly connected to a waste discharge pipe, and the output end of the waste discharge pipe is fixedly connected to a waste liquid container.

[0012] Furthermore, a rubber sealing ring is fixedly connected to one end of the filter tube near the mounting tube to prevent air leakage after connection.

[0013] This utility model has the following beneficial effects: 1. In this utility model, the cap-opening cone and the container cap with a sealing plate enable quick replacement of the flushing fluid container. The operator only needs to place the container, and the cap-opening cone can automatically break through the sealing plate, avoiding the risk of cross-contamination between different flushing fluids that may occur when changing flushing fluids.

[0014] 2. In this utility model, after rinsing, the device can introduce a clean airflow and, combined with the flexible switching of the common pipeline and the three-way valve, air dry the rinsed pipeline. This air drying process can be seamlessly connected to liquid rinsing, and can thoroughly blow and dry the entire post-pump flow path, providing protection for the instrument to be stored for a long time. Attached Figure Description

[0015] Figure 1 This is a perspective view of a post-pump rinsing device for an ion chromatograph according to the present invention. Figure 2 This is a schematic diagram of the platform structure of a post-pump rinsing device for an ion chromatograph proposed in this utility model; Figure 3 This is a schematic diagram of the opening cone structure of a post-pump rinsing device for an ion chromatograph proposed in this utility model; Figure 4 This is a schematic diagram of the flushing liquid container structure of a post-pump flushing device for an ion chromatograph proposed in this utility model; Figure 5 This is a schematic diagram of the container cap structure of a post-pump rinsing device for an ion chromatograph proposed in this utility model; Figure 6 This is a schematic diagram of the filter air inlet assembly of a post-pump rinsing device for an ion chromatograph proposed in this utility model. Figure 7 This is a schematic diagram of the installation structure of the filter air inlet assembly of a post-pump rinsing device for an ion chromatograph proposed in this utility model. Figure 8 This is a schematic diagram of the pin structure of a post-pump rinsing device for an ion chromatograph proposed in this utility model; Figure 9This is a schematic diagram of the internal structure of the filter air inlet assembly of a post-pump rinsing device for an ion chromatograph proposed in this utility model.

[0016] Legend: 1. Base; 2. High-pressure pump; 3. Component housing; 4. Rinse solution container; 5. Three-way valve one; 6. Common pipeline; 7. Three-way valve two; 8. Rinse solution pipeline; 9. Rinse pump; 10. Platform; 11. Rinse solution container; 12. Clip one; 13. Air inlet pipeline; 14. Three-way valve three; 15. Waste discharge pipeline; 16. Waste liquid container; 17. Water tank; 18. Opening cone; 19. Container cover; 20. Sealing plate; 21. Mounting pipe; 22. Mounting ring; 23. Filter pipe; 24. Pin seat; 25. Pin hole seat; 26. Filter layer; 27. T-shaped slide; 28. T-shaped protrusion; 29. ​​Pin; 30. Clip two; 31. Electric fan; 32. Wind baffle; 33. Filter cartridge; 34. Frame. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Reference Figure 1-3 This utility model provides an embodiment of a post-pump rinsing device for an ion chromatograph, comprising a base 1, a high-pressure pump 2 fixedly connected to the rear end of the top side of the base 1, an eluent container 4 fixedly connected to the input end of the high-pressure pump 2, a three-way valve 5 installed at the output end of the high-pressure pump 2, the three-way valve 5 having two input ends, one of which is fixedly connected to the output end of the high-pressure pump 2, and the other input end is fixedly connected to a common pipe 6, a component housing 3 fixedly connected to the output end of the three-way valve 5, a component for the post-pump and pre-injection port of the ion chromatograph installed inside the component housing 3, and a three-way valve 14 fixedly connected to the output end of the component housing 3, the output end of the three-way valve 14... There are two common pipes. One output end is fixedly connected to the waste discharge pipe 15, and the other output end is connected to the inlet of the ion chromatograph. The output end of the waste discharge pipe 15 is fixedly connected to the waste liquid container 16, which is used to discharge the waste liquid after rinsing to prevent the waste liquid from entering the inlet and contaminating the subsequent precision components. The input end of the common pipe 6 is equipped with a three-way valve 2 7. The three-way valve 2 7 has two input ends. One input end is fixedly connected to the rinsing liquid pipe 8, and the other input end is fixedly connected to the air inlet pipe 13, which allows for flexible switching between the post-pump rinsing or purging process. The input end of the air inlet pipe 13 is connected to the filter pipe 23 through a disassembly assembly. The filter pipe 23 has a filter air inlet assembly inside.

[0019] Reference Figure 2 and Figure 3 A flushing pump 9 is fixedly connected to the input end of the flushing fluid pipeline 8. A base 10 is fixedly connected to the input end of the flushing pump 9. The top of the base 10 is used to place and fix the flushing fluid container 11. A buckle 12 is fixedly connected to the top side of the base 10. A groove is opened on the outer wall of the flushing fluid container 11. The buckle 12 is engaged in the groove to ensure that the container is placed stably. A water tank 17 is provided inside the base 10. An opening cone 18 is fixedly connected to the middle of the bottom side of the water tank 17. A liquid flow hole is opened on the outer wall of the opening cone 18, and the flow hole is connected to the flushing fluid pipeline 8.

[0020] Reference Figure 4 and Figure 5 The opening of the flushing fluid container 11 is threadedly connected to the container cap 19. The sealing plate 20 is fixedly connected to the middle of the container cap 19. When the flushing fluid container 11 is correctly placed on the platform 10 and is locked by the buckle 12, the cap opening cone 18 will push upward to break through the sealing plate 20 in the center of the container cap 19, so that the inside of the container is connected to the water tank 17 of the platform 10. After the flushing pump 9 is started, the flushing fluid in the flushing fluid container 11 can be drawn through the water tank 17.

[0021] Reference Figure 6-8 An installation pipe 21 is fixedly connected to the input end of the air inlet duct 13. An installation ring 22 is rotatably connected to the end of the installation pipe 21 away from the air inlet duct 13. Four T-shaped grooves 27 are opened on the inner wall of both the installation pipe 21 and the installation ring 22. Four T-shaped protrusions 28 and a rubber sealing ring for sealing are fixedly connected to the outer wall of the filter pipe 23. During installation, the T-shaped protrusions 28 of the filter pipe 23 are aligned with the T-shaped grooves 27 of the installation ring 22 and inserted into the T-shaped grooves 27 inside the installation pipe 21. The installation ring 22 is rotated at a certain angle to lock the T-shaped protrusions 28. Four pin seats 24 are fixedly connected to the outer wall of the installation pipe 21. Pins 29 are slidably connected inside the pin seats 24. A second buckle 30 fixed to the outer wall of the installation pipe 21 is provided next to them. The outer wall of the mounting ring 22 is fixedly connected to four pin hole seats 25, and the inside has a insertion hole. When the mounting ring 22 is rotated into place, the pin 29 is pushed so that one end is inserted into the insertion hole of the pin hole seat 25, and the other end is locked in the buckle 30. This realizes the quick and reliable installation and disassembly of the filter tube 23, which is convenient for replacement or maintenance. The double locking and sealing ring ensure that the connection is firm and leak-free.

[0022] Reference Figure 9A filter layer 26 is fixedly connected to the input end of the filter tube 23 for preliminary filtration of large particles. An electric fan 31 is installed inside the air inlet duct 13 to generate airflow. Two wind baffles 32 are fixedly connected inside the filter tube 23. A rotating shaft is rotatably connected to the adjacent side of the two wind baffles 32. A cylinder frame 34 is fixedly connected to both ends of the rotating shaft. A filter cylinder 33 is rotatably connected to the adjacent side of the two cylinder frames 34. The filter cylinder 33 can adsorb fine impurities in the airflow. When the electric fan 31 is started, the airflow is initially filtered by the filter layer 26 and then impacts the wind baffles 32 and the filter cylinder 33. After filtration, it is used to purge the pipeline.

[0023] Working principle: During cleaning, the three-way valve 27 is switched to connect the flushing fluid pipeline 8 and the common pipeline 6, and the three-way valve 5 is switched to connect the common pipeline 6 and the component housing 3. The flushing fluid container 11 is placed on the platform 10, and the buckle 12 is locked into the groove on the outer wall of the container. When the container 11 descends, the cap-opening cone 18 punctures the sealing plate 20 of the container cap 19, and the liquid inside the container connects with the flushing fluid pipeline 8 through the liquid flow hole on the outer wall of the cap-opening cone 18. The flushing pump 9 is started, and the flushing fluid is drawn through the water tank 17. The solution is taken and flows sequentially through the flushing fluid pipeline 8, three-way valve 2 7, and common pipeline 6 into three-way valve 1 5. It then flows through the inside of the component housing 3, through the pump, and into the inlet pipeline. The flushing waste liquid is switched to the waste discharge pipeline 15 via three-way valve 3 14, and finally discharged into the waste liquid container 16 to avoid contaminating the inlet and subsequent components. During pipeline purging, three-way valve 2 7 is switched to connect the air inlet pipeline 13 and the common pipeline 6, while three-way valve 1 5 remains connected to the common pipeline 6 and the component housing 3. The electric fan 31 is then started. The airflow, after initial filtration through the filter layer 26 of the filter tube 23, impacts the baffle block 32 and passes through the adsorption filter cylinder 33. The rotating shaft between the baffle blocks 32 and the filter cylinder 33 are rotated by an external motor to ensure maximum adsorption range and adsorption of fine impurities. The purified airflow sequentially passes through the air inlet pipe 13, three-way valve 2 7, and common pipe 6 into three-way valve 1 5, and then flows through the internal pipes of the component housing 3 for purging. The purging residue is switched to the waste discharge pipe 15 by three-way valve 3 14 and discharged into the waste. When the filter tube 23 needs to be replaced in the liquid container 16, release the locking of the second buckle 30, pull out the pin 29 in the insertion hole of the pin hole seat 25, rotate the mounting ring 22 in the opposite direction to align the T-shaped protrusion 28 with the T-shaped groove 27, and the filter tube 23 can be removed. During installation, insert the T-shaped protrusion 28 of the filter tube 23 into the T-shaped groove 27 of the mounting ring 22, rotate the mounting ring 22 to the locking position, insert the pin 29 to fix it in the pin hole seat 25, and at the same time, snap the second buckle 30 to achieve double locking. The rubber sealing ring ensures a seal.

[0024] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A post-pump rinsing device for an ion chromatograph, comprising a base (1), characterized in that: A high-pressure pump (2) is fixedly connected to the top rear end of the base (1). A rinsing liquid container (4) is fixedly connected to the input end of the high-pressure pump (2). A three-way valve (5) is installed at the output end of the high-pressure pump (2). The three-way valve (5) has two input ends. One input end is fixedly connected to the output end of the high-pressure pump (2), and the other input end is fixedly connected to a common pipe (6). A three-way valve (7) is installed at the input end of the common pipe (6). The three-way valve (7) has two input ends. One input end is fixedly connected to a flushing liquid pipe (8), and the other input end is fixedly connected to an air inlet pipe (13). A flushing pump (9) is fixedly connected to the input end of the flushing liquid pipe (8). A platform (10) is fixedly connected to the input end of the flushing pump (9). A flushing liquid container (11) is connected to the top of the platform (10) through a replacement component. A filter pipe (23) is connected to the input end of the air inlet pipe (13) through a disassembly and assembly component. A filter air inlet component is installed inside the filter pipe (23).

2. The post-pump rinsing device for an ion chromatograph according to claim 1, characterized in that: The replacement assembly includes a water tank (17) fixedly connected inside the base (10) and a container cap (19) threadedly connected to the opening of the flushing liquid container (11). A cap-opening cone (18) is fixedly connected to the bottom middle of the water tank (17), and a sealing plate (20) is fixedly connected to the inner middle of the container cap (19).

3. The post-pump rinsing device for an ion chromatograph according to claim 1, characterized in that: The assembly and disassembly assembly includes an installation pipe (21) fixedly connected to the input end of the air inlet duct (13). An installation ring (22) is rotatably connected to one end of the installation pipe (21) away from the air inlet duct (13). The inner walls of the installation pipe (21) and the installation ring (22) are provided with four T-shaped grooves (27). The outer wall of the filter pipe (23) is fixedly connected with four T-shaped protrusions (28). The T-shaped protrusions (28) are slidably connected inside the T-shaped grooves (27).

4. The post-pump rinsing device for an ion chromatograph according to claim 3, characterized in that: Four pin seats (24) are fixedly connected to the outer wall of the end of the installation pipe (21) away from the air inlet pipe (13). Each of the four pin seats (24) has a pin (29) slidably connected inside. Each of the four pin seats (24) has a second buckle (30) on one side. The second buckle (30) is fixedly connected to the outer wall of the installation pipe (21). Four pin hole seats (25) are fixedly connected to the outer wall of the installation ring (22). Each of the four pin hole seats (25) has an insertion hole inside. One end of the pin (29) is inserted into the insertion hole, and the other end is snapped into the inside of the second buckle (30).

5. The post-pump rinsing device for an ion chromatograph according to claim 1, characterized in that: The air intake filtration assembly includes a filter layer (26) fixedly connected to the input end of the filter tube (23) and an electric fan (31) installed inside the air intake duct (13). Two wind baffles (32) are fixedly connected inside the filter tube (23). A rotating shaft is rotatably connected to the adjacent side of the two wind baffles (32). Both ends of the rotating shaft are fixedly connected to a cylinder frame (34). A filter cylinder (33) is rotatably connected to the adjacent side of the two cylinder frames (34).

6. The post-pump rinsing device for an ion chromatograph according to claim 2, characterized in that: The top side of the base (10) is fixedly connected to a buckle (12), and the outer wall of the flushing liquid container (11) is provided with a slot, and the buckle (12) is engaged inside the slot.

7. The post-pump rinsing device for an ion chromatograph according to claim 1, characterized in that: The output end of the three-way valve one (5) is fixedly connected to the component housing (3), the output end of the component housing (3) is fixedly connected to the three-way valve three (14), the three-way valve three (14) has two output ends, one of which is fixedly connected to the waste discharge pipe (15), and the output end of the waste discharge pipe (15) is fixedly connected to the waste liquid container (16).

8. The post-pump rinsing device for an ion chromatograph according to claim 4, characterized in that: A rubber sealing ring is fixedly connected to one end of the filter tube (23) near the mounting tube (21) to prevent air leakage after connection.

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