Solvent filtration device

Abstract

The application provides a solvent filtering device, which comprises a collecting bottle for collecting filtered solution, a transition container connected with the collecting bottle, a peristaltic pump arranged between the collecting bottle and the transition container, and a filter system connected with the transition container, wherein the filter system comprises a plurality of filters connected with the transition container and a liquid inlet pipe corresponding to each filter. The plurality of needle filters in the filter system can simultaneously perform filtering, and the operation of replacing the filter membrane is omitted, so that the efficiency of solvent filtering is effectively improved. In addition, the needle filters can avoid liquid leakage during the filtering process, and improve the filtering effect.

Description

Technical Field

[0001] This application relates to the field of solvent filtration technology, and more particularly to a solvent filtration device suitable for liquid chromatography solutions. Background Technology

[0002] Laboratory solvent filtration is a common solid-liquid separation technique. However, current laboratory filtration systems have certain shortcomings. They typically utilize glass frit filters and membranes. Glass frit filters are prone to leakage, and membranes require frequent replacement when handling large volumes of solvent. Most filtration systems are single-unit, resulting in low filtration efficiency. Furthermore, traditional filtration devices often have small filter bottles, making them unsuitable for filtering large volumes of solvents.

[0003] In view of this, it is necessary to design a new type of solvent filtration device to solve one of the above problems. Utility Model Content

[0004] This application provides a solvent filtration device that can improve filtration efficiency and filtration quality.

[0005] To achieve the above objectives, the technical solution provided in this application is as follows: This application provides a solvent filtration device, which includes a collection bottle for collecting filtered solution, a transition container connected to the collection bottle via a connecting pipe, a peristaltic pump disposed between the collection bottle and the transition container, and a filter system connected to the transition container. The filter system includes a plurality of filters connected to the transition container and inlet pipes corresponding to each filter.

[0006] Furthermore, the solvent filtration device also includes a one-way valve disposed on the connecting pipe, the one-way valve being located near the transition container.

[0007] Furthermore, the peristaltic pump includes a rotor, a speed regulator communicatively connected to the rotor, and a switch for controlling the operation of the speed regulator.

[0008] Furthermore, the filter includes a body having a cavity, a connector and a mating connector respectively communicating with the body, the connector and the mating connector being respectively located at both ends of the body.

[0009] Furthermore, the outer diameter of the connector gradually decreases in the direction away from the body, and the inner diameter of the mating connector is not less than the maximum outer diameter of the connector.

[0010] Furthermore, the connector is inserted into the inlet pipe, and the transition container is provided with a mating hole that mates with the connector. The inner wall of the mating hole is provided with a protrusion, so that the connector and the transition container are interference-fitted.

[0011] Furthermore, the transition container also includes a connector protruding outward from the mating hole, the outer diameter of the connector being no greater than the inner diameter of the mating joint, and the connector engaging with the plug joint.

[0012] Furthermore, the filter system also includes a first connector for connecting the plug to the inlet pipe, and / or a second connector for connecting the connector to the transition container.

[0013] Furthermore, the plug-in connector is plugged into the transition container, the mating connector is plugged into the inlet pipe, and the filter system further includes a third connector for connecting the plug-in connector and the transition container, and / or a fourth connector for connecting the mating connector and the inlet pipe.

[0014] Furthermore, the solvent filtration device also includes a fixing structure for fixing a plurality of the inlet pipes to the solvent bottle, and a pressure balancing structure provided on the fixing structure for connecting the inside and outside of the solvent bottle, wherein the fixing structure is sealed to the solvent bottle.

[0015] Compared with related technologies, the advantages of this application are as follows: by using the solvent filtration device of this application, filtration is carried out simultaneously through several needle filters of the filter system and the operation of replacing filter membranes is omitted, which effectively improves the efficiency of solvent filtration; moreover, the use of needle filters can avoid leakage during the filtration process and improve the filtration effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a solvent filtration device according to an embodiment of the solvent filtration device of this application.

[0017] Figure 2 yes Figure 1 A schematic diagram of the structure of the filter system.

[0018] Figure 3 yes Figure 1 A schematic diagram of another embodiment of the filter system structure.

[0019] Figure 4 yes Figure 1 A schematic diagram of another embodiment of the filter system structure.

[0020] Figure 5 yes Figure 1A schematic diagram of another embodiment of the filter system structure.

[0021] Figure 6 yes Figure 1 A schematic diagram of another embodiment of the filter system structure.

[0022] Figure 7 yes Figure 1 A schematic diagram of another embodiment of the filter system structure.

[0023] Among them, 10-collection bottle, 11-connecting pipe, 20-transition container, 21-docking hole, 22-connector, 23-auxiliary structure, 24-auxiliary chamber, 30-peristaltic pump, 31-rotor, 32-speed regulator, 33-switch, 40-filter system, 41-filter, 411-body, 412-plug, 413-button, 42-inlet pipe, 43-first connector, 44-second connector, 45-third connector, 46-fourth connector, 50-one-way valve, 60-fixed structure, 70-pressure balance structure, 80-pipeline sinker. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this application.

[0025] It should be noted that the terms "upper" and "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the purpose of simplifying the description of this application and do not indicate or imply that the device referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this application. Specifically, in this application, the direction facing the ground is referred to as "lower," and conversely, the direction away from the ground is referred to as "upper." Other descriptions of orientation are defined based on "upper" and "lower."

[0026] In the various figures of this application, for ease of illustration, certain dimensions of structures or parts may be exaggerated relative to other structural parts; therefore, they are only used to illustrate the basic structure of the subject matter of this application.

[0027] This application provides a solvent filtration device for filtering a solution to be filtered in a solvent bottle 2, and the filtered solution is used in a liquid chromatograph.

[0028] like Figures 1 to 7As shown, the solvent filtration device includes a collection bottle 10 for collecting the filtered solution, a transition container 20 connected to the collection bottle 10, a peristaltic pump 30 disposed between the collection bottle 10 and the transition container 20, and a filter system 40 connected to the transition container 20. The solution to be filtered in the solvent bottle 2 is filtered through the filter system 40 and then transported to the collection bottle 10 for later use.

[0029] like Figure 1 As shown, the transition container 20 is connected to the solvent bottle 10 via a connecting pipe 11, and the peristaltic pump 30 is mounted on the connecting pipe 11. The transition container 20 is a laterally extending sealed container, and the bottom of the transition container 20 is provided with a plurality of docking holes 21 for cooperating with the filter system 40, and the plurality of docking holes 21 are arranged at intervals.

[0030] In this application, the upper end of the collection bottle 10 is lower than the lower end of the transition container 20, which facilitates the transfer of the solution in the transition container 20 to the collection bottle 10.

[0031] The peristaltic pump 30 provides power to the filtration system 40 and regulates the power level. The filtrate enters the filtration system 40 from the solvent bottle 2, and then enters the collection bottle 10 through the connecting pipe 11, thus achieving solvent filtration. Specifically, the peristaltic pump 30 includes a rotor 31, a speed regulator 32 communicatively connected to the rotor 31, and a switch 33 that controls the operation of the speed regulator 32.

[0032] The filter system 40 includes a plurality of filters 41 connected to the transition container 20 and an inlet pipe 42 corresponding to each filter 41. The end of the inlet pipe 42 away from the filter 41 extends to the bottom of the solvent bottle 2. The plurality of filters 41 can filter simultaneously or select several filters to improve the filtration efficiency.

[0033] like Figures 2 to 7 As shown, the filter 41 includes a body 411 with a cavity, a connector 412 and a connector 413 respectively connected to the body 411. The connector 412 and the connector 413 are respectively located at both ends of the body 411. The filter 41 also includes a filter membrane disposed in the cavity. The filter membrane is disposed inside the closed body 411 to improve the airtightness during the solvent filtration process and avoid leakage or secondary contamination of the solution.

[0034] The connector 412 is a straight male connector with an outer diameter that gradually decreases in the direction away from the body 411, forming a needle filter. This facilitates connection with the transition container 20 or the inlet pipe 42. The connector 413 is a Luer external screw connector with an inner diameter that is not less than the maximum outer diameter of the connector 412, thus avoiding affecting the speed at which the solution enters the filter 41.

[0035] As a preferred embodiment of this application, such as Figure 2 As shown, the plug connector 412 is plugged into the inlet pipe 42. The transition container 20 is provided with a mating hole 21 that mates with the mating connector 413. The inner wall of the mating hole 21 has a concave thread structure. The mating connector 413 is screwed into the concave thread structure of the cavity to achieve locking and sealing, preventing it from falling off or leaking under negative or positive pressure. Moreover, the plug connector 412 and the mating connector 413 directly mate with the inlet pipe 42 and the transition container 20 respectively, saving parts and simplifying operation.

[0036] like Figure 3 and Figure 4 As shown, in order to improve the bonding strength between the connector 413 and the transition container 20, the transition container 20 further includes a connector 22 protruding outward from the docking hole 21. The outer diameter of the connector 22 is not greater than the inner diameter of the connector 413. The connector 413 and the transition container 20 are bonded together by the connector 22 and the connector 413 being inserted into each other.

[0037] In one specific embodiment, such as Figure 3 As shown, the end of the connector 22 extends beyond the transition container 20, and the mating head 413 is directly plugged into and fixed to the connector 22 for easy operation.

[0038] In another specific embodiment, if the end of the connector 22 does not extend beyond the transition container 20, that is, if the end of the connector 22 is still located inside the docking hole 21, the inner wall of the docking hole 21 and the outer wall of the connector 22 are spaced apart, the connector 22 and the mating head 413 are inserted and fitted together, and at the same time, the mating head 413 and the docking hole 21 are also inserted and fixed, thereby realizing a double insertion and fitting fixed mode between the filter 41 and the transition container 20, further improving the bonding strength between the filter 41 and the transition container 20.

[0039] It is understood that the end of the connector 22 does not extend beyond the transition container 20, which can be achieved by widening the mating hole 21, or by providing an auxiliary structure 23 below the transition container 20, such as... Figure 4 As shown, an auxiliary cavity 24 is provided at the corresponding position of the auxiliary structure 23. The auxiliary cavity 24 has a concave thread structure. After the connector 413 extends into the auxiliary cavity 24, it is inserted and engaged with the connector 22. At the same time, the connector 413 is screwed into the concave thread structure of the auxiliary cavity 24 to achieve the purpose of locking and sealing, further improving the bonding strength between the filter 41 and the transition container 20.

[0040] As another preferred embodiment of this application, such as Figure 5As shown, the filter system 40 further includes a first connector 43 for connecting the plug 412 to the inlet pipe 42, and / or a second connector 44 for connecting the connector 413 to the transition container 20, thereby achieving a sealed connection and fixation between the filter 41 and the transition container 20 and the inlet pipe 42 through the first connector 43 and / or the second connector 44.

[0041] The first connector 43 has a female head structure at one end to be inserted into the plug 412, and a pagoda-shaped male head at the other end to be inserted into the inlet pipe 42; the second connector 44 has a male external thread structure at one end to be threaded into the concave thread structure in the mating hole 21, and a Luer internal screw connector at the other end to be locked and fixed with the Luer external screw connector of the mating connector 413.

[0042] As another preferred embodiment of this application, such as Figure 6 and Figure 7 As shown, the connector 412 is plugged into the transition container 20, and the mating connector 413 is plugged into the inlet pipe 42. Due to the large cross-sectional area of ​​the mating connector 413, the solution to be filtered flows from the mating connector 413 to the connector 412, which can improve the flow of the solution and thus improve the filtration efficiency. The filter system 40 also includes a third connector 45 for connecting the connector 412 and the transition container 20, and / or a fourth connector 46 for connecting the mating connector 413 and the inlet pipe 42, which can realize the quick assembly and disassembly of the filter 41, the transition container 20, and the inlet pipe 42, as well as the sealing fit.

[0043] Among them, one end of the third connector 45 is a male external thread structure to lock and engage with the internal thread structure of the mating hole 21, and the other end is a female straight insertion structure to engage with the plug connector 412; one end of the fourth connector 46 is a Luer internal screw structure, which can lock and engage with the Luer external screw structure of the mating connector 413, and the other end is a straight insertion pagoda male head for easy direct engagement with the liquid inlet pipe 42.

[0044] To prevent the solution in the connecting pipe 11 from flowing back into the transition container 20, the solvent filtration device also includes a one-way valve 50 disposed on the connecting pipe 11, the one-way valve 50 being disposed close to the transition container 20.

[0045] The solvent filtration device further includes a fixing structure 60 for fixing a plurality of the inlet pipes 42 to the solvent bottle 2, and a pressure balancing structure 70 provided on the fixing structure 60 for connecting the inside and outside of the solvent bottle 2. The fixing structure 60 is sealed to the solvent bottle 2.

[0046] To ensure that all the inlet pipes 42 are at the bottom of the solvent bottle 2, the solvent filtration device also includes a pipe sinker 80 connected to the bottom of the inlet pipes 42, so as to ensure that the lower ends of all the inlet pipes 42 are at the bottom of the solvent bottle 2.

[0047] In summary, the solvent filtration device of this application effectively improves the efficiency of solvent filtration by using a plurality of needle filters 41 in the filter system 40 to perform filtration simultaneously and by eliminating the need to replace the filter membrane; moreover, the use of needle filters 41 can avoid leakage during the filtration process and improve the filtration effect.

[0048] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0049] The detailed descriptions listed above are merely specific illustrations of feasible embodiments of this application and are not intended to limit the scope of protection of this application. All equivalent embodiments or modifications made without departing from the spirit of the art of this application should be included within the scope of protection of this application.

Claims

1. A solvent filtration device, characterized in that, include: A collection bottle for collecting the filtered solution, a transition container connected to the collection bottle via a connecting pipe, a peristaltic pump located between the collection bottle and the transition container, and a filter system connected to the transition container, the filter system including a plurality of filters connected to the transition container and inlet pipes corresponding to each filter.

2. The solvent filtration device as described in claim 1, characterized in that, The solvent filtration device also includes a one-way valve disposed on the connecting pipe, the one-way valve being located near the transition container.

3. The solvent filtration device as described in claim 1, characterized in that, The peristaltic pump includes a rotor, a speed regulator that is communicatively connected to the rotor, and a switch that controls the operation of the speed regulator.

4. The solvent filtration apparatus according to any one of claims 1 to 3, characterized in that, The filter includes a body with a cavity, a connector and a mating connector respectively connected to the body, and the connector and mating connector are respectively located at both ends of the body.

5. The solvent filtration device as described in claim 4, characterized in that, The outer diameter of the connector gradually decreases in the direction away from the body, and the inner diameter of the mating connector is not less than the maximum outer diameter of the connector.

6. The solvent filtration device as described in claim 5, characterized in that, The connector is inserted into the inlet pipe, and the transition container is provided with a mating hole that mates with the connector. The inner wall of the mating hole is provided with a protrusion, so that the connector and the transition container are interference-fitted.

7. The solvent filtration apparatus as described in claim 6, characterized in that, The transition container also includes a connector protruding outward from the mating hole, the outer diameter of the connector being no greater than the inner diameter of the mating joint, and the connector being inserted into the plug joint.

8. The solvent filtration apparatus as described in claim 6, characterized in that, The filter system further includes a first connector for connecting the plug to the inlet pipe, and / or a second connector for connecting the connector to the transition container.

9. The solvent filtration device as described in claim 5, characterized in that, The plug is inserted into the transition container, and the mating connector is inserted into the inlet pipe. The filter system further includes a third connector for connecting the plug to the transition container, and / or a fourth connector for connecting the mating connector to the inlet pipe.

10. The solvent filtration apparatus as claimed in claim 1, characterized in that, The solvent filtration device further includes a fixing structure for fixing a plurality of the inlet pipes to the solvent bottle, and a pressure balancing structure provided on the fixing structure for connecting the inside and outside of the solvent bottle, wherein the fixing structure is sealed to the solvent bottle.

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