Needle cylinder type filter membrane filter

Abstract

The utility model provides a needle cylinder type filter membrane filter which comprises an upper cover, a lower cover, a push column, a mounting ring and a filter membrane, a threaded liquid injection pipe is communicated and mounted in the middle above the upper cover, a butt joint groove is formed in the side of the lower part of the upper cover, a cross strip is mounted in the middle below the upper cover, and a liquid discharge pipe is communicated and mounted in the middle below the lower cover; an inserting ring is installed on the side of the upper portion of the lower cover, a plurality of containing grooves are formed in the circumference of the upper portion of the inserting ring at equal intervals, magnetic sheets are installed at the bottoms of the containing grooves respectively, a protruding sheet is fixedly connected to the annular side face of the pushing column in a sleeved mode, a spring is installed on the left side of the protruding sheet, and an L-shaped strip is fixed to the annular side face of the pushing column. The upper disc body and the lower disc body can be conveniently and rapidly connected and rapidly detached, the filter membrane sheet can be well limited, and the overall use convenience is improved.

Description

Technical Field

[0001] This utility model is a syringe-type membrane filter, belonging to the technical field of laboratory purification equipment. Background Technology

[0002] Syringe-type membrane filters are mainly used for filtering mobile phases and samples in chromatographic analysis, effectively protecting the chromatographic column, infusion pump system, and injection valve from contamination. They are widely used in gravimetric analysis, microanalysis, colloidal separation, and aseptic testing.

[0003] Patent No. CN213823749U discloses a syringe-type membrane filter. This filter places the membrane sheet within a chamber and connects the upper and lower discs via a locking block and slot. The operation is convenient and quick, reducing the time spent connecting the upper and lower discs. Once the locking block and slot are engaged, the end face of the upper disc located inside the slot presses the membrane sheet within the chamber, improving its stability. However, while this device allows for quick connection of the upper and lower discs, separation requires force to pull them apart, lacking convenience. Therefore, a syringe-type membrane filter is urgently needed to address these issues. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a syringe-type membrane filter to solve the problems mentioned in the background. This utility model has a reasonable structure, good practicality, and facilitates quick connection and disassembly of the upper and lower discs. It also provides good positioning of the filter membrane, improving the overall ease of use.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a syringe-type membrane filter, comprising an upper cover, a lower cover, a push column, an mounting ring, and a filter membrane. A threaded injection tube is connected and installed in the upper center of the upper cover. A docking groove is provided on the lower side of the upper cover. A cross strip is installed in the lower center of the upper cover. A drain pipe is connected and installed in the lower center of the lower cover. A plug-in ring is installed on the upper side of the lower cover. Multiple placement grooves are equidistantly arranged on the upper circumference of the plug-in ring. A magnetic sheet is installed at the bottom of each of the multiple placement grooves. A protrusion is fixedly sleeved on the annular side of the push column. A spring is installed on the left side of the protrusion. An L-shaped strip is fixedly fixed on the annular side of the push column. Multiple first limiting rings are equidistantly installed on the lower circumference of the mounting ring. A magnetic column is installed at the lower end of each of the multiple first limiting rings. A second limiting ring is fixedly sleeved on the annular side of each of the multiple magnetic columns. Multiple limiting plates are fixed on the annular side of the filter membrane.

[0006] Furthermore, each of the aforementioned limiting plates has a through hole in the middle of its upper part.

[0007] Furthermore, the upper cover has a first square groove symmetrically arranged on its annular side, and a second square groove symmetrically arranged on its lower side, with the first square groove and the second square groove communicating with each other. The lower cover has an L-shaped groove symmetrically arranged on its upper side, and a third square groove symmetrically arranged on its annular side, with the L-shaped groove and the third square groove communicating with each other.

[0008] Furthermore, the upper cover has a plurality of first circular grooves equidistantly arranged on its upper circumference, and the bottom surface of the plurality of first circular grooves is respectively provided with second circular grooves, and the diameter of the plurality of first limiting rings is larger than the diameter of the plurality of second circular grooves.

[0009] Furthermore, each of the two third-party tanks has a receiving tank on the side near the drain pipe, and each of the two third-party tanks has a sliding groove on its upper and lower inner walls.

[0010] Furthermore, there are two push columns, the two springs are respectively connected to the inner walls of the two third grooves, the two push columns are respectively slidably connected inside the two receiving grooves, and the upper and lower ends of the two protrusions are respectively slidably connected in multiple sliding grooves.

[0011] The beneficial effects of this utility model are as follows: This utility model is a syringe-type membrane filter. Because this utility model adds a threaded injection tube, a docking groove, a cross bar, a drain tube, a spring, a raised plate, a magnetic column, a plug ring, and a mounting ring, our design improvements and actual use have shown that this device has a reasonable structure, good practicality, facilitates quick connection and disassembly of the upper and lower discs, and provides good limiting of the filter membrane, thus improving the overall ease of use. Attached Figure Description

[0012] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0013] Figure 1 This is a three-dimensional schematic diagram of the overall structure of a syringe-type membrane filter according to the present invention;

[0014] Figure 2 This is a three-dimensional schematic diagram of the upper cover structure of a syringe-type membrane filter according to the present invention;

[0015] Figure 3 This is a three-dimensional schematic diagram of the lower cover structure of a syringe-type membrane filter according to the present invention;

[0016] Figure 4 This is a three-dimensional schematic diagram of the filter membrane structure of a syringe-type membrane filter according to the present invention;

[0017] Figure 5 This is a three-dimensional schematic diagram of the mounting ring structure of a syringe-type membrane filter according to the present invention;

[0018] Figure 6 This is a three-dimensional schematic diagram of the push column structure of a syringe-type membrane filter according to the present invention;

[0019] Figure 7 This is a three-dimensional cross-sectional structural diagram of a syringe-type membrane filter according to the present invention;

[0020] Figure 8 This utility model relates to a syringe-type membrane filter. Figure 7 A magnified three-dimensional schematic diagram of the structure at point A.

[0021] In the diagram: 1-Upper cover, 2-Lower cover, 3-Push column, 4-Mounting ring, 5-Filter membrane, 10-Threaded injection tube, 11-Connecting groove, 12-Cross strip, 13-First square groove, 14-Second square groove, 15-First round groove, 16-Second round groove, 20-Drain pipe, 21-Plug-in ring, 22-Placement groove, 23-Magnetic sheet, 24-Third square groove, 25-L-shaped groove, 26-Receiving groove, 27-Sliding groove, 30-L-shaped strip, 31-Spring, 32-Protrusion piece, 40-First limiting ring, 41-Magnetic column, 42-Second limiting ring, 50-Limiting plate, 51-Through hole. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0023] Please see Figures 1-8 This utility model provides a technical solution: a syringe-type membrane filter, including an upper cover 1, a lower cover 2, a pusher column 3, a mounting ring 4, and a filter membrane 5. A threaded injection tube 10 is connected and installed in the middle of the upper part of the upper cover 1. A docking groove 11 is provided on the lower side of the upper cover 1. A cross bar 12 is installed in the middle of the lower part of the upper cover 1. A drain pipe 20 is connected and installed in the middle of the lower part of the lower cover 2. A plug-in ring 21 is installed on the upper side of the lower cover 2. Multiple placement grooves 22 are equidistantly arranged on the circumference of the plug-in ring 21. Magnetic sheets 23 are respectively installed at the bottom of the multiple placement grooves 22. The pusher column 3 is fixed on the annular side. The device is fitted with a protruding piece 32, and a spring 31 is installed on the left side of the protruding piece 32. An L-shaped strip 30 is fixed to the annular side of the push column 3. Multiple first limiting rings 40 are installed at equal intervals around the lower circumference of the mounting ring 4. Magnetic columns 41 are respectively installed at the lower ends of the multiple first limiting rings 40. Second limiting rings 42 are respectively fixed to the annular side of the multiple magnetic columns 41. Multiple limiting plates 50 are fixed to the annular side of the filter membrane 5. This design solves the problem that although the original device can quickly connect the upper and lower discs, it requires force to pull the upper and lower discs apart when separating them, which is not convenient.

[0024] As the first embodiment of this utility model: Multiple limiting plates 50 are provided with through holes 51 in their upper middle sections, facilitating the insertion of magnetic pillars 41. The upper cover 1 has symmetrically provided first square grooves 13 on its annular side, and second square grooves 14 symmetrically provided below it, with the first square grooves 13 and second square grooves 14 communicating. The lower cover 2 has symmetrically provided L-shaped grooves 25 on its upper side, and third square grooves 24 symmetrically provided on its annular side, with the L-shaped grooves 25 communicating with them, facilitating the placement of L-shaped strips 30. Multiple first circular grooves 15 are equidistantly provided around the upper circumference of the upper cover 1, and second circular grooves 16 are provided on the bottom surfaces of the multiple first circular grooves 15. The diameter of the multiple first limiting rings 40 is larger than the diameter of the multiple second circular grooves 16, facilitating the placement of the first limiting rings 40 through the first circular grooves 15 and second circular grooves 16. Two third-party grooves 24 are each provided with a receiving groove 26 on the side near the drain pipe 20. The upper and lower inner walls of the two third-party grooves 24 are respectively provided with sliding grooves 27. The receiving grooves 26 are provided to facilitate the accommodation of the push column 3. There are two push columns 3. Two springs 31 are respectively connected to the inner walls of the two third-party grooves 24. The two push columns 3 are slidably connected inside the two receiving grooves 26. The upper and lower ends of the two protrusions 32 are slidably connected in multiple sliding grooves 27. By slidably connecting the upper and lower ends of the two protrusions 32 in multiple sliding grooves 27, the movement of the push column 3 is more stable.

[0025] As a second embodiment of this utility model: In use, first place the multiple limiting plates 50 on the side of the filter membrane 5 into the multiple placement slots 22, so that the filter membrane 5 is placed inside the lower cover 2. Then, the operator simultaneously presses the two push posts 3, so that the two push posts 3 move along the receiving slots 26 respectively, thereby causing the two protrusions 32 to squeeze the two springs 31. Then, the upper cover 1 and the lower cover 2 are connected, so that the insertion ring 21 is inserted into the connection slot 11. Then, the two push posts 3 are released. At this time, the two springs 31 are reset, which drives the two push posts 3 to reset, thereby driving the two L-shaped strips 30 to reset, so that the two L-shaped strips 30 are horizontal. The notch at the corner below the intersection of the upper and lower ends abuts against the walls of the two L-shaped grooves 25, thus enabling the upper cover 1 and the lower cover 2 to be connected. Then, multiple magnetic pillars 41 are inserted into multiple first circular grooves 15, so that the multiple magnetic pillars 41 pass through multiple through holes 51 and are magnetically attracted to multiple magnetic sheets 23. The first circular grooves 15 support the first limiting rings 40. Multiple limiting plates 50 abut against multiple second limiting rings 42, thus providing a good limiting effect on the filter membrane 5. When disassembling the upper cover 1 and the lower cover 2, press the two pushing pillars 3 to move the two L-shaped strips 30, and the upper cover 1 and the lower cover 2 can be separated directly, which is convenient and quick.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0027] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and 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.

Claims

1. A syringe-type membrane filter, comprising an upper cover (1), a lower cover (2), a pusher column (3), a mounting ring (4), and a filter membrane (5), characterized in that: A threaded injection pipe (10) is connected to the upper center of the upper cover (1), a docking groove (11) is provided on the lower side of the upper cover (1), a cross bar (12) is installed in the lower center of the upper cover (1), a drain pipe (20) is connected to the lower center of the lower cover (2), a plug ring (21) is installed on the upper side of the lower cover (2), and multiple placement grooves (22) are provided equidistantly on the upper circumference of the plug ring (21), and magnetic sheets (23) are respectively installed at the bottom of the multiple placement grooves (22); The push column (3) has a protruding piece (32) fixedly sleeved on its annular side. A spring (31) is installed on the left side of the protruding piece (32). An L-shaped strip (30) is fixedly sleeved on the annular side of the push column (3). Multiple first limiting rings (40) are equidistantly installed on the lower circumference of the mounting ring (4). Magnetic columns (41) are respectively installed at the lower ends of the multiple first limiting rings (40). Second limiting rings (42) are fixedly sleeved on the annular side of the multiple magnetic columns (41). Multiple limiting plates (50) are fixedly sleeved on the annular side of the filter membrane (5).

2. The syringe-type membrane filter according to claim 1, characterized in that: Each of the aforementioned limiting plates (50) has a through hole (51) in the middle of its upper part.

3. A syringe-type membrane filter according to claim 1, characterized in that: The upper cover (1) has a first square groove (13) symmetrically arranged on its annular side, and a second square groove (14) symmetrically arranged on its lower side. The first square groove (13) and the second square groove (14) are connected. The lower cover (2) has an L-shaped groove (25) symmetrically arranged on its upper side, and a third square groove (24) symmetrically arranged on its annular side. The L-shaped groove (25) and the third square groove (24) are connected.

4. A syringe-type membrane filter according to claim 1, characterized in that: The upper cover (1) has multiple first circular grooves (15) equidistantly spaced on its upper circumference. The bottom surfaces of the multiple first circular grooves (15) are respectively provided with second circular grooves (16). The diameter of the multiple first limiting rings (40) is larger than the diameter of the multiple second circular grooves (16).

5. A syringe-type membrane filter according to claim 3, characterized in that: The two third-party tanks (24) are respectively provided with receiving tanks (26) on the side near the drain pipe (20), and the upper and lower inner walls of the two third-party tanks (24) are respectively provided with sliding grooves (27).

6. A syringe-type membrane filter according to claim 1, characterized in that: Two push columns (3) are provided. Two springs (31) are respectively connected to the inner walls of two third third grooves (24). The two push columns (3) are respectively slidably connected inside the two receiving grooves (26). The upper and lower ends of the two protrusions (32) are respectively slidably connected in multiple sliding grooves (27).

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