Anti-blocking needle cylinder type filter membrane filter

Abstract

The invention provides an anti-blocking needle cylinder type filter membrane filter which is characterized in that a plurality of concave liquid distribution grooves are uniformly formed in the bottom end of an upper disc, and liquid distribution holes communicated with a liquid inlet pipe are formed in the groove walls of the liquid distribution grooves in the radial direction of the upper disc; the anti-blocking assembly comprises a connecting frame set and a balance body, the connecting frame set is connected with the bottom end of the upper disc in a clamped mode, a liquid passing open groove corresponding to the outline of the liquid distribution groove is formed in the connecting frame set, and the filtering membrane is located between the connecting frame set and the upper disc; the balance body is movably arranged in the connecting frame set in a sleeved mode, and a striking arm extending to the position below the liquid passing open groove is arranged on the periphery of the balance body. Through the design of the anti-blocking assembly and the liquid separation tank, if the filter diaphragm is blocked in the use process of the filter, the displacement of the striking arm can be realized by utilizing pressure difference, then the blocking part of the filter diaphragm is knocked and vibrated by the striking arm to remove the blocking, the striking arm can be automatically reset after the blocking is removed, and the striking and the vibration are continued when the filter diaphragm is blocked again; therefore, the problem of blockage of the filtering membrane is solved.

Description

Technical Field

[0001] The invention relates to the technical field of syringe-type membrane filters, and in particular to an anti-clogging syringe-type membrane filter. Background Art

[0002] Syringe membrane filters are mainly used for filtering mobile phases and samples in chromatographic analysis, and have a good effect on protecting chromatographic columns, infusion pump systems, and injection valves from contamination. They are widely used in weight analysis, microanalysis, colloid separation, and sterility testing; The syringe-type membrane filter is mainly composed of an upper disk body with a liquid inlet pipe, a lower disk body with a liquid outlet pipe and a filter membrane. The existing syringe-type membrane filters generally have the disadvantage of being easily clogged. Once clogged, it is difficult to discharge the liquid, the operation is inconvenient, the residual rate is high, and the membrane filter needs to be replaced many times, which not only reduces the filtration efficiency but also causes waste of the filter. Summary of the invention

[0003] In view of this, the problem to be solved by the present invention is to provide a syringe-type membrane filter that is resistant to clogging.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: An anti-clogging syringe filter membrane filter, wherein a plurality of concave liquid separation grooves are evenly configured on the bottom end of an upper plate, and liquid separation holes connected to a liquid inlet pipe are opened on the groove wall of the liquid separation groove along the radial direction of the upper plate; The anti-blocking component includes a connecting frame group and a balancing body. The connecting frame group is clamped with the bottom end of the upper plate and is provided with a liquid-passing groove corresponding to the contour of the liquid separation groove. The filter membrane is located between the connecting frame group and the upper plate. The balancing body is movably sleeved in the connecting frame group, and a striking arm extending to the bottom of the liquid-passing groove is provided on the outer periphery of the balancing body.

[0005] The connecting frame group includes a hollow frame and a cover frame which are connected to each other, the liquid-passing slot is provided on the hollow frame, and a vertical slot corresponding to the striking arm is provided on the outer periphery of the cover frame; The balancing body is movably sleeved in the hollow frame and the cover frame, and the top surface and the bottom surface of the balancing body are both hemispherical or ellipsoidal structures.

[0006] The hollow frame and the cover frame are both cylindrical structures, and the inner cavity contour of the hollow frame corresponds to the filter membrane.

[0007] The striking arm comprises a transverse portion for connecting to a balancing body and a vertical portion for striking and vibrating the filter membrane.

[0008] A vertical guide groove is configured on the peripheral surface of the vertical portion.

[0009] The bottom end of the upper plate is also configured with an annular embedding groove corresponding to the outline of the hollow frame.

[0010] A hemispherical convex point is constructed on the inner bottom surface of the upper plate below the liquid inlet pipe.

[0011] The filter also includes a lower plate; the upper plate is buckled and installed in the lower plate, and the outer peripheral surface of the upper plate and the inner peripheral surface of the lower plate are heat-sealed and welded.

[0012] The advantages and positive effects of the present invention are: (1) Through the design of the anti-blocking component and the liquid separation tank, if the filter membrane is blocked during use, the pressure difference can be used to achieve the displacement of the striking arm, and then the blocked part of the filter membrane can be knocked and vibrated by the striking arm to clear the blockage. After the blockage is cleared, the striking arm can reset itself and continue to knock and vibrate when it is blocked again, thereby solving the problem of filter membrane blockage.

[0013] (2) When assembling the filter, the cover frame is connected to the hollow frame so that the balancing body is installed in the connecting frame group. The hollow frame is embedded in the annular groove to achieve the connection between the upper plate and the entire connecting frame group. Finally, the sealing of the connection between the upper plate and the lower plate is ensured by heat sealing welding. This makes the assembly of the entire filter convenient and the lower plate and the filter membrane have no design changes compared with the existing technical solution, so the production cost is further reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0015] In the attached picture: Figure 1 It is an overall structural diagram of an anti-clogging syringe-type membrane filter of the present invention; Figure 2 It is an exploded view of the upper plate, the filter membrane and the connecting frame assembly; Figure 3 It is a structural diagram of the connecting frame group; Figure 4 This is an exploded view of the connecting frame group; Figure 5 It is a cross-sectional view of an anti-clogging syringe-type membrane filter of the present invention; In the figure: upper plate 1, liquid separation tank 11, liquid separation hole 111, liquid inlet pipe 12, connecting frame group 21, hollow frame 211, cover frame 212, balance body 22, striking arm 23, transverse part 231, vertical part 232, liquid passing slot 24, vertical slot 25, filter membrane 3, lower plate 4. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0019] like Figures 1 to 5 As shown, the present invention provides an anti-clogging syringe filter, wherein a plurality of concave liquid separation grooves 11 are uniformly constructed on the bottom end of the upper plate 1, and liquid separation holes 111 connected to the liquid inlet pipe 12 are opened on the groove wall of the liquid separation groove 11 along the radial direction of the upper plate 1, and the liquid separation groove 11 forms an L-shaped flow channel with the liquid inlet pipe 12 through the liquid separation holes 111, and the sample liquid is evenly divided to each liquid separation groove 11 through the liquid separation holes 111, and then uniformly penetrates the filter membrane 3 through the liquid separation grooves 11, so that the flow rate and flow rate of the liquid passing part of the filter membrane 3 are relatively balanced; The anti-blocking assembly 2 includes a connecting frame group 21 and a balancing body 22. The connecting frame group 21 is clamped with the bottom end of the upper plate 1 and is configured with a liquid-passing slot 24 corresponding to the contour of the liquid-separating slot 11. The filter membrane 3 is located between the connecting frame group 21 and the upper plate 1, so that the filter membrane 3 is configured below the liquid-separating slot 11. The balancing body 22 is movably sleeved in the connecting frame group 21, and a striking arm 23 extending to below the liquid-passing slot 24 is configured on the outer periphery of the balancing body 22. If the filter membrane 3 between each group of liquid passing grooves 11 and the liquid slots 24 is not blocked, the liquid flow rate and flow velocity of each group of liquid passing grooves 24 are relatively balanced, so that each group of striking arms 23 remains below the liquid passing grooves 24. After being filtered by the filter membrane 3, the sample liquid enters the lower plate 4 from the liquid passing grooves 24 and is discharged through the liquid outlet pipe at the bottom of the lower plate 4. When the filter membrane 3 between a group of liquid passing grooves 24 and the liquid separation grooves 11 is blocked, the liquid flow rate and flow velocity of this group of liquid passing grooves 24 will be reduced, and then the liquid flow rate and flow velocity borne by the corresponding striking arm 23 of this group will be different from those of other groups. Under the action of the pressure difference, the striking arms 23 of other groups push the balancing body 22 to make the striking arms 23 of this group tilt upward and then penetrate the liquid passing grooves 24 to vibrate. The filter membrane 3 separates the impurity particles from the filter membrane 3 under the action of vibration. After the blockage of this part of the filter membrane 3 is cleared, the liquid flow rate and flow rate borne by the corresponding impact arm 23 are restored to the same as those of other groups, so that the impact arm 23 is reset, and the next filtration can be carried out. If the blockage is not cleared, the impact arm 23 corresponding to the unblocked group will remain in a downward state under the action of the pressure difference, so that the impact arm 23 corresponding to the unblocked group maintains the maximum distance with the liquid passing slot 24, thereby accelerating the passage of the sample liquid. That is, when part of the filter membrane 3 is blocked, if the blockage cannot be cleared, the displacement of the impact arm 23 will also be used to re-divided the pressure of each liquid dividing slot 11, so that the sample liquid flows evenly through the unblocked part of the filter membrane 3, thereby alleviating the difficulty in liquid discharge.

[0020] Specifically, a hemispherical convex point is constructed on the inner bottom surface of the upper plate 1 below the pipe opening of the liquid inlet pipe 12, and a plurality of liquid separation holes 111 surround and enclose the outer side of the area constructed with the hemispherical convex point; The sample liquid enters from the liquid inlet pipe 12 and first impacts the hemispherical convex points. The hemispherical convex points are arranged in a row on the inner bottom surface of the upper plate 1 in the direction of the liquid separation hole 111, thereby playing the role of guiding the liquid to the liquid separation hole 111 and impacting the particles in the sample liquid, thereby breaking up the large volume of impurity particles in the sample liquid and reducing the possibility of the filter membrane 3 being blocked.

[0021] Specifically, the connecting frame group 21 includes a hollow frame 211 and a cover frame 212 that are connected to each other, the liquid-passing groove 24 is opened on the hollow frame 211, and a vertical groove 25 corresponding to the striking arm 23 is opened on the outer periphery of the cover frame 212. The balancing body 22 is movably mounted in the hollow frame 211 and the cover frame 212. The height of the vertical groove 25 is the moving stroke of the striking arm 23. The top and bottom surfaces of the balancing body 22 are both hemispherical or ellipsoidal structures, thereby reducing the resistance of the balancing body 22 when it swings, and also ensuring that when there is no blockage, when the filter is placed upright for use, the balancing body 22 will not tilt relatively.

[0022] Specifically, the hollow frame 211 and the cover frame 212 are both cylindrical structures. The inner cavity contour of the hollow frame 211 corresponds to the filter membrane 3. After the hollow frame 211 is clamped with the bottom end of the upper plate 1, the movement of the filter membrane 3 is restricted in the axial and radial directions, so that the filter membrane 3 is tightly attached between the liquid passing groove 24 and the liquid separation groove 11. In the present application, a clamping column is arranged at the bottom of the hollow frame 211, and a clamping hole is constructed on the cover frame 212.

[0023] Specifically, the striking arm 23 includes a transverse portion 231 for connecting the balancing body 22 and a vertical portion 232 for striking the filter membrane 3. A vertical guide groove is constructed on the peripheral surface of the vertical portion 232 to guide the flow of the sample liquid along the direction of the transverse portion 231.

[0024] Specifically, the bottom end of the upper plate 1 is also configured with an annular embedding groove corresponding to the outline of the hollow frame 211, the hollow frame 211 is connected with the annular embedding groove by clamping, a boss is configured on the inner peripheral wall of the lower plate 4, the upper plate 1 is buckled and installed in the lower plate 4, the upper plate 1 abuts against the boss to achieve the support of the lower plate 4 on the upper plate 1, and the outer peripheral surface of the upper plate 1 and the inner peripheral surface of the lower plate 4 are heat-sealed and welded; During assembly, the cover frame 212 is clamped with the hollow frame 211, so that the balancing body 22 is installed in the connecting frame group 21, and the hollow frame 211 is clamped into the annular groove to realize the connection between the upper plate 1 and the entire connecting frame group 21. Finally, the sealing of the connection between the upper plate 1 and the lower plate 4 is ensured by heat sealing welding, so that the entire filter is easy to assemble and there is no design change between the lower plate 4 and the filter membrane 3 compared with the existing technical solution, so the production cost is further reduced.

[0025] The working principle and working process of the present invention are as follows: During filtration, the sample liquid is evenly distributed to each liquid distribution slot 11 through the liquid distribution hole 111. If the filter membrane 3 between each group of liquid distribution slots 11 and the liquid slot 24 is not blocked, the sample liquid evenly penetrates the filter membrane 3 through the liquid distribution slot 11, enters the lower plate 4 from the liquid slot 24, and is discharged through the liquid outlet pipe at the bottom of the lower plate 4. In this process, since the liquid outlet flow rate and flow rate of each group of liquid slots 24 are relatively balanced, each group of striking arms 23 is kept below the liquid slots 24. If a group of filter membranes 3 between the liquid-passing slots 24 and the liquid-dividing slots 11 is blocked, the liquid flow rate and flow rate of the liquid-passing slots 24 of the group will be reduced, and the liquid flow rate and flow rate of the corresponding striking arms 23 of the group will be different from those of other groups. Under the action of the pressure difference, the striking arms 23 of other groups push the balancing body 22 so that the striking arms 23 of the group are tilted upward and then penetrate the liquid-passing slots 24 to vibrate the filter membrane 3. Under the action of vibration, the impurity particles are separated from the filter membrane 3. After the blockage is cleared, the corresponding filter membrane 3 of the part of the filter membrane 3 The liquid flow rate and flow rate borne by the striking arm 23 are also restored to the same as those of other groups, thereby resetting the striking arm 23. If the blockage is not cleared, the striking arm 23 corresponding to the unblocked group will remain in a downward state under the action of the pressure difference, so that the striking arm 23 corresponding to the unblocked group maintains the maximum distance with the liquid passing slot 24, thereby accelerating the passage of the sample liquid. If the blockage cannot be cleared, the pressure of each liquid dividing slot 11 will be re-divided through the displacement of the striking arm 23, so that the sample liquid can flow evenly through the unblocked part of the filter membrane 3, thereby alleviating the difficulty in liquid discharge.

[0026] The embodiments of the present invention are described in detail above, but the contents described are only preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of this patent.

Claims

1. A plug-proof syringe filter, characterized in that: A plurality of inwardly concave liquid separation grooves (11) are evenly formed on the bottom end of the upper plate (1), and liquid separation holes (111) connected to the liquid inlet pipe (12) are opened on the groove wall of the liquid separation groove (11) along the radial direction of the upper plate (1); The anti-blocking component (2) comprises a connecting frame group (21) and a balancing body (22), wherein the connecting frame group (21) is clamped with the bottom end of the upper plate (1) and a liquid-passing slot (24) corresponding to the contour of the liquid separation slot (11) is formed on the connecting frame group (21), and the filter membrane (3) is located between the connecting frame group (21) and the upper plate (1); the balancing body (22) is movably sleeved in the connecting frame group (21), and a striking arm (23) extending to the bottom of the liquid-passing slot (24) is formed on the outer periphery of the balancing body (22).

2. The anti-clogging syringe membrane filter according to claim 1, characterized in that: The connecting frame assembly (21) comprises a hollow frame (211) and a cover frame (212) which are connected to each other, the liquid-passing slot (24) is provided on the hollow frame (211), and a vertical slot (25) corresponding to the striking arm (23) is provided on the outer periphery of the cover frame (212); The balancing body (22) is movably sleeved in the hollow frame (211) and the cover frame (212); the top surface and the bottom surface of the balancing body (22) are both hemispherical or ellipsoidal structures.

3. The anti-clogging syringe membrane filter according to claim 2, characterized in that: The hollow frame (211) and the cover frame (212) are both cylindrical structures, and the inner cavity contour of the hollow frame (211) corresponds to the filter membrane (3).

4. The anti-clogging syringe membrane filter according to claim 1, characterized in that: The striking arm (23) comprises a transverse portion (231) for connecting to the balancing body (22) and a vertical portion (232) for striking and vibrating the filter membrane (3).

5. The anti-clogging syringe membrane filter according to claim 4, characterized in that: A vertical guide groove is configured on the peripheral surface of the vertical portion (232).

6. The anti-clogging syringe membrane filter according to claim 3, characterized in that: The bottom end of the upper plate (1) is also configured with an annular embedding groove corresponding to the contour of the hollow frame (211).

7. The anti-clogging syringe membrane filter according to claim 1, characterized in that: A hemispherical convex point is constructed on the inner bottom surface of the upper plate (1) below the liquid inlet pipe (12).

8. The anti-clogging syringe membrane filter according to claim 1, characterized in that: The filter also includes a lower plate (4), the upper plate (1) being snap-fitted and installed in the lower plate (4), and the outer peripheral surface of the upper plate (1) and the inner peripheral surface of the lower plate (4) being heat-sealed and welded.

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