Vacuum filter

Abstract

The utility model discloses a vacuum filter, including: receiving bottle and filter component, receiving bottle, the upper end protruding is provided with the bottle mouth, filter component, including upper cup and connector, the inside hollow of connector and pass through up and down, the outside of connector is provided with a plurality of communicating tubes, and communicating pipe is connected with connection, and the upper end of connector is provided with the hopper, and the lower extreme of hopper is connected with the connector, and the hopper is provided with the filter membrane in, and upper cup detachably installs to the hopper, and upper cup and hopper cooperation clamps the filter membrane, and connector and bottle mouth butt joint. After filtering, the connector is separated with receiving bottle, then again through the upper cup is separated with connector, can filter membrane be taken out, convenient replacement, reduce use cost, after replacement, again install new filter membrane to the hopper, then install upper cup again, and upper cup will filter membrane press in the hopper, again connector and the bottle mouth butt joint of receiving bottle, can use, convenient and fast.

Description

Technical Field

[0001] This utility model relates to the field of filter technology, and in particular to a vacuum filter. Background Technology

[0002] Vacuum filters utilize a vacuum pump to provide a pressure difference for the filtration of large volumes of tissue culture media and other laboratory fluid solutions. Sample throughput can reach several liters, and the filtered samples can be directly stored in sterile collection bottles. They are ideal for the sterile filtration of cell culture media, buffers, and reagents. Currently common vacuum filters typically consist of an upper cup and a receiving bottle. The filter membrane is usually fixed in the upper cup by heat pressing or other methods. Cleaning the filter membrane is cumbersome, and it must be replaced along with the upper cup when replacing the membrane, resulting in higher operating costs. Utility Model Content

[0003] To address the aforementioned technical problems, this utility model provides a vacuum filter that allows for easy removal of the filter membrane for cleaning and replacement, thereby reducing operating costs.

[0004] According to a first aspect of the present invention, a vacuum filter includes: a receiving bottle and a filtering assembly; the receiving bottle has a bottle mouth protruding from its upper end; the filtering assembly includes an upper cup and a connector, the connector being hollow and vertically connected, with multiple connecting tubes on its outer side, the connecting tubes communicating with the connector, a funnel being provided at the upper end of the connector, the lower end of the funnel communicating with the connector, a filter membrane being provided inside the funnel, the upper cup being detachably mounted on the funnel, the upper cup and the funnel clamping the filter membrane, and the connector engaging with the bottle mouth.

[0005] In some embodiments of this utility model, a first sealing ring is provided between the upper cup and the funnel, the upper cup and the funnel cooperate to squeeze the first sealing ring, and the upper cup drives the first sealing ring to press the filter membrane.

[0006] In some embodiments of this utility model, an insertion groove is provided on the upper side of the first sealing ring, and the end of the upper cup is inserted into the insertion groove.

[0007] In some embodiments of this utility model, the lower side of the first sealing ring protrudes to form an abutment portion, a positioning ring protrudes from the inside of the funnel, the filter membrane is disposed inside the positioning ring, the abutment portion is sleeved with the positioning ring, and the abutment portion abuts against the filter membrane.

[0008] In some embodiments of this utility model, the funnel is provided with a plurality of support bars, the support bars are arranged radially, the plurality of support bars are arranged equidistantly in the circumferential direction, and the filter membrane is disposed on the support bars.

[0009] In some embodiments of this utility model, a mesh is provided inside the funnel, and the mesh is disposed between the filter membrane and the support strip.

[0010] In some embodiments of this utility model, a sleeve is provided around the lower end of the upper cup, the sleeve is sleeved with the funnel, and a locking post is provided on the outer side of the funnel, the sleeve is engaged with the locking post to install the upper cup onto the funnel.

[0011] In some embodiments of this utility model, the sleeve has a groove, and a buckle protrudes from one side wall of the groove. The buckle and the side wall of the groove cooperate to form a guide groove, and the guide groove guides the locking pin to engage with the buckle.

[0012] In some embodiments of this utility model, the lower end of the connector is provided with a connecting tube, the connecting tube is threaded to the bottle mouth, the inner wall of the connecting tube protrudes to form a limiting part, and when the connecting tube is connected to the bottle mouth, the end of the bottle mouth abuts against the limiting part.

[0013] In some embodiments of this utility model, the limiting part is provided with a second sealing ring, and when the bottle mouth is connected to the connecting pipe, the end of the bottle mouth presses against the second sealing ring.

[0014] Compared with the prior art, the vacuum filter of this utility model has the following advantages: First, the culture medium is poured into the upper cup, then the vacuum pump is connected to the connector. After the vacuum pump is started, a negative pressure is formed in the connector and the receiving bottle, causing the culture medium to automatically pass through the filter membrane and filter into the receiving bottle through the funnel. After filtration, the connector is separated from the receiving bottle, and then the filter membrane can be removed by separating the upper cup from the connector, which is convenient for replacement. It can be adapted to filter membranes of different specifications, materials and pore sizes, reducing the cost of use. The new filter membrane is placed in the funnel, and then the upper cup is installed. The upper cup presses the filter membrane tightly in the funnel. Then the connector is connected to the bottle mouth of the receiving bottle, and it can be put into use, reducing the difficulty of replacement and improving the replacement efficiency. In addition, by setting multiple connecting tubes, it is possible to connect to multiple vacuum pumps at the same time, which speeds up the filtration speed and improves efficiency. The connector and the receiving bottle are detachably connected, which makes it convenient to replace receiving bottles of different capacities. By replacing with a larger capacity receiving bottle, the collection volume can be increased. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a vacuum filter according to an embodiment of the present invention; Figure 2 for Figure 1 A magnified view of a portion of point A in the middle; Figure 3This is an exploded view of the vacuum filter according to an embodiment of the present invention; Figure 4 This is a cross-sectional view of a vacuum filter according to an embodiment of the present invention; Figure 5 for Figure 4 A magnified view of a portion of point B in the middle; Figure 6 This is a schematic diagram of the connector in the vacuum filter according to an embodiment of the present invention.

[0016] Explanation of reference numerals in the attached figures: Upper cup 100; armrest 110; sleeve 120; guide groove 121; lock 122; first sealing ring 130; insertion groove 131; abutment part 132; connector 200; connecting pipe 210; connecting pipe 220; funnel 230; locking post 231; positioning ring 232; support bar 233; guide tube 234; gasket 240; second sealing ring 250; receiving bottle 300; hand grip structure 310; bottle mouth 320; limiting part 321; filter membrane 400. Detailed Implementation

[0017] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0018] Reference Figure 1 and Figure 3 The vacuum filter of the first aspect of this utility model includes: a receiving bottle 300 with a bottle mouth 231 protruding from the upper end; a filter assembly including an upper cup 100 and a connector 200, the connector 200 being hollow and vertically connected, a connecting pipe 210 being provided on the outer side of the connector 200, the connector 200 being connected to a vacuum pump through the connecting pipe 210, multiple connecting pipes 210 being provided, a funnel 230 being provided at the upper end of the connector 200, the lower end of the funnel 230 being connected to the connector 200, a filter membrane 400 being provided inside the funnel 230, the upper cup 100 being detachably installed on the funnel 230, the upper cup 100 and the funnel 230 cooperating to clamp the filter membrane 400, and the connector 200 being connected to the bottle mouth 231.

[0019] First, pour the culture medium into the upper cup 100. Then, connect the vacuum pump to the connector 200. After the vacuum pump starts, a negative pressure is created between the connector 200 and the receiving bottle 300, causing the culture medium to automatically pass through the filter membrane 400 and filter into the receiving bottle 300 through the funnel 230. After filtration, separate the connector 200 from the receiving bottle 300. Then, separate the upper cup 100 from the connector 200 to remove the filter membrane 400. Replacement is quick and easy, reducing operating costs. After replacement, install the new filter membrane 400 into the funnel 230, and then install the upper cup 100. The upper cup 100 presses the filter membrane 400 tightly into the funnel 230. Then, connect the connector 200 to the bottle opening 231 of the receiving bottle 300 for reuse. It is convenient and quick, and can be adapted to filter membranes 400 of different specifications, materials, and pore sizes. In addition, multiple connecting pipes 210 are provided, enabling connector 200 to connect to multiple vacuum pumps simultaneously, increasing the negative pressure inside the connector and receiving bottle, accelerating the passage of filtrate through the filter membrane, speeding up the filtration process, and improving filtration efficiency.

[0020] It should be noted that the lower end of the funnel 230 is provided with a conduit 234, which extends into the connector 200. The outlet of the conduit 234 is located below the outlet of the connecting tube 210. This prevents the culture medium from being sucked into the vacuum pump by the connecting tube 210 when the vacuum pump is working, and ensures that the filtered culture medium falls stably into the receiving bottle 300.

[0021] Understandably, referring to Figure 1 The receiving bottle 300 has a concave hand grip structure 310 on its body, which makes it easy to hold the receiving bottle 300 after filtration and reduces the risk of dropping it.

[0022] Understandably, referring to Figures 3 to 5A first sealing ring 130 is provided between the upper cup 100 and the funnel 230. The upper cup 100 and the funnel 230 cooperate to compress the first sealing ring 130, and the upper cup 100 drives the first sealing ring 130 to press the filter membrane 400. The first sealing ring 130 is a ring-shaped elastic element, which can be made of silicone or rubber material. It is used to form a sealing interface and transmit pressure when deformed under pressure, and to prevent the filter membrane 400 from rupturing while pressing it. When the upper cup 100 is installed into the funnel 230, the axial distance between the two gradually decreases, forcing the first sealing ring 130 to be compressed in the vertical direction. After being compressed, the first sealing ring 130 expands radially, and its lower surface contacts the edge of the filter membrane 400 and transmits pressure to the filter membrane 400, so that the filter membrane 400 is fixed between the first sealing ring 130 and the inner wall of the funnel 230. During this process, the first sealing ring 130 simultaneously seals the contact interface between the upper cup 100 and the funnel 230 to prevent liquid from leaking from the assembly gap. The removable first sealing ring 130 structure ensures the reliability of the filter membrane 400 while allowing the filter membrane 400 to be replaced independently of the upper cup 100, avoiding the waste of parts caused by filter membrane replacement. The filter membrane 400 achieves reliable sealing and positioning without the need for hot pressing, while reducing maintenance costs and extending the service life of the upper cup 100.

[0023] Understandably, referring to Figure 3 and Figure 5 The first sealing ring 130 has an insertion groove 131 on its upper side, and the lower end of the upper cup 100 is inserted into the insertion groove 131. When the upper cup 100 is installed into the funnel 230, the lower end of the upper cup 100 is inserted into the insertion groove 131 of the first sealing ring 130. The side wall of the insertion groove 131 radially limits the upper cup 100, preventing it from shifting during installation and facilitating installation and disassembly. The first sealing ring 130 undergoes elastic deformation under compression, causing a surface contact between the side wall of the insertion groove 131 and the lower end of the upper cup 100, thereby achieving a seal and preventing liquid leakage. Through the insertion of the insertion groove 131 into the end of the upper cup 100, the first sealing ring 130 is constrained both radially and axially, which not only improves the uniformity of the seal but also reduces the risk of the first sealing ring 130 falling off during disassembly. By engaging with the insertion slot 131, the first sealing ring 130 can be automatically guided to position itself during the installation of the upper cup 100 and the funnel 230, avoiding manual adjustment of its position. This also enhances the first sealing ring 130's resistance to displacement, ensuring that liquid does not leak from the contact surface between the first sealing ring 130 and the upper cup 100 during the filtration process, thereby improving the reliability and efficiency of the filtration operation.

[0024] Understandably, referring to Figure 4 and Figure 5The lower side of the first sealing ring 130 protrudes to form an abutment portion 132. A positioning ring 232 protrudes from inside the funnel 230, and the filter membrane 400 is disposed inside the positioning ring 232. The abutment portion 132 is sleeved with the positioning ring 232, and the abutment portion 132 abuts against the filter membrane 400. The abutment portion 132 refers to the annular protrusion extending outward from the lower side of the first sealing ring 130, and the positioning ring 232 refers to the annular boss extending upward inside the funnel 230. By sleeved with the positioning ring 232, the edge of the filter membrane 400 is pressed tightly to prevent liquid from leaking from the edge of the filter membrane 400. In addition, the positioning ring 232 can also provide a supporting boundary for the filter membrane 400, restricting the horizontal displacement of the filter membrane 400. When the first sealing ring 130 is installed into the funnel 230, its lower abutment portion 132 and the positioning ring 232 form a sleeved fit, and the filter membrane 400 is placed inside the positioning ring 232. After the first sealing ring 130 is subjected to the axial pressure of the upper cup 100, the abutment part 132 presses down on the edge of the filter membrane 400 to achieve positioning of the filter membrane 400 and prevent the filter membrane 400 from shifting. In addition, when replacing the filter membrane 400, the operator only needs to place the filter membrane 400 into the positioning ring 232 to complete the centering, without the need for repeated adjustments, which significantly improves assembly efficiency and reduces the difficulty of operation.

[0025] Understandably, referring to Figure 3 , Figure 5 and Figure 6 The funnel 230 contains multiple support bars 233 arranged radially and equidistantly circumferentially. The filter membrane 400 is disposed on the support bars 233. The equidistant circumferential arrangement of the support bars 233 means that the support bars 233 are evenly distributed around the central axis of the funnel 230, which uniformly distributes the liquid pressure on the filter membrane 400, preventing it from being crushed. Furthermore, during filtration, it prevents the filter membrane 400 from being subjected to longitudinal pressure and sticking to the bottom surface of the funnel 230, thus avoiding a reduction in filtration efficiency.

[0026] Understandably, referring to Figures 3 to 5 A mesh 240 is installed inside the funnel 230, positioned between the filter membrane 400 and the support strip 233. The mesh 240 is a mesh structure with uniform pores, used to form a uniform support surface below the filter membrane 400, dispersing the pressure generated by liquid flow and preventing damage to the filter membrane 400 due to localized stress concentration. Simultaneously, the double-layer support structure formed by the mesh 240 and the support strip 233 effectively reduces the deformation of the filter membrane 400 under vacuum negative pressure. By adding an independent mesh 240 between the support strip 233 and the filter membrane 400, the uniformity of support for the filter membrane 400 is enhanced, and separate maintenance of the filter membrane 400 and the support structure is achieved.

[0027] Understandably, referring to Figure 3 and Figure 4 A sleeve 120 is provided around the lower end of the upper cup 100. The inner side of the sleeve 120 is fitted with a funnel 230, and a locking pin 231 protrudes from the outer side of the funnel 230. The sleeve 120 and the locking pin 231 engage to install the upper cup 100 onto the funnel 230. The inner diameter of the sleeve 120 is slightly larger than the outer diameter of the funnel 230 to achieve a fitted fit. The axial fitting of the sleeve 120 and the funnel 230 provides a positioning basis for subsequent locking. Specifically, after the sleeve 120 and the funnel 230 are fitted together, the upper cup 100 and the funnel 230 are quickly positioned. Then, by rotating the upper cup 100, it engages with the locking pin 231, thus assembling the upper cup 100 and the funnel 230. The operation is simple and allows for quick disassembly.

[0028] Understandably, referring to Figure 2 The sleeve 120 has a groove, and a latch 122 is formed by the protrusion of the side wall of one side of the groove. The latch 122 and the side wall of the groove cooperate to form a guide groove 121. The guide groove 121 is L-shaped in general. The latch 122 has a recess, which is located at the end of the guide groove 121. When the locking pin 231 moves along the guide groove 121 to the end, the locking pin 231 is inserted into the recess, thereby achieving a latching connection with the latch 122. When installing the upper cup 100 onto the funnel 230, the operator aligns the guide groove 121 with the locking post 231 on the outside of the funnel 230. A handle 110 is provided on the outside of the upper cup 100. The upper cup 100 is pressed down via the handle 110, causing the locking post 231 to enter the guide groove 121. Then, the upper cup 100 is rotated, and the locking post 231 moves along the guide groove 121 to its end and engages with the recess, thus locking the post 231 with the latch 122. A stable axial constraint is formed between the sleeve 120 and the funnel 230. The directional guidance of the guide groove 121 ensures that the locking post 231 accurately reaches the engagement position each time, achieving rapid positioning and installation of the upper cup 100 and the funnel 230. This avoids repeated adjustments to the installation angle and improves the efficiency of filter membrane 400 replacement.

[0029] Understandably, referring to Figure 3 and Figure 4 The connector 200 has a connecting tube 220 at its lower end, which is threaded to the bottle opening 231. A limiting part 321 protrudes from the inner wall of the connecting tube 220. When the connecting tube 220 is connected to the bottle opening 231, the end of the bottle opening 231 abuts against the limiting part 321. The connecting tube 220 is mechanically connected to the bottle opening 231 of the receiving bottle 300 via a threaded connection. When the bottle opening 231 is screwed into the connecting tube 220, it continues until it contacts the limiting part 321. This threaded connection between the connecting tube 220 and the bottle opening 231 facilitates quick and easy loading and unloading of the receiving bottle 300, improving efficiency and reducing the difficulty of use. Furthermore, the limiting part 321 restricts the longitudinal travel of the connecting tube 220, preventing damage caused by excessive screwing.

[0030] Understandably, referring to Figure 3 and Figure 4 The limiting part 321 is provided with a second sealing ring 250. When the bottle mouth 231 is connected to the connecting pipe 220, the end of the bottle mouth 231 presses against the second sealing ring 250. When the bottle mouth 231 is screwed into the connecting pipe 220 by threads, the end of the bottle mouth 231 contacts the limiting part 321 and presses against the second sealing ring 250. During this process, the second sealing ring 250 fills the gap between the end face of the bottle mouth 231 and the limiting part 321 due to elastic deformation, thereby forming a reliable seal between the connecting pipe 220 and the bottle mouth 231. By adding a second sealing ring 250 to the limiting part 321, the axial pressure of the threaded connection compresses and deforms the second sealing ring 250, causing it to expand radially and fill the gap between the outer wall of the bottle mouth 231 and the inner wall of the connecting pipe 220. The axial pressure also causes the second sealing ring 250 to undergo elastic deformation to block the leakage path of liquid or gas, which significantly improves the sealing reliability. At the same time, it avoids the sealing failure problem caused by frequent disassembly, ensures the airtightness between the receiving bottle 300 and the connector 200 during the filtration process, prevents external contaminants from entering or internal liquid from leaking, thereby ensuring the stability of the sterile filtration environment and reducing maintenance costs caused by sealing failure.

[0031] First, pour the culture medium into the upper cup 100. Then, connect the vacuum pump to the connector 200. After the vacuum pump starts, a negative pressure is created between the connector 200 and the receiving bottle 300, causing the culture medium to automatically pass through the filter membrane 400 and filter into the receiving bottle 300 through the funnel 230. After filtration, separate the connector 200 from the receiving bottle 300. Then, separate the upper cup 100 from the connector 200 to remove the filter membrane 400 for easy replacement and reduced operating costs. After replacement, put the new filter membrane 400 back into the funnel 230, and then reinstall the upper cup 100. The upper cup 100 presses the filter membrane 400 tightly into the funnel 230. Finally, connect the connector 200 to the bottle opening 231 of the receiving bottle 300 to put the new filter membrane 400 into use. This process is convenient and quick.

[0032] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and substitutions can be made without departing from the counting principle of this utility model, and these improvements and substitutions should also be considered within the protection scope of this utility model.

Claims

1. A vacuum filter, characterized in that, Including: The receiving bottle has a protruding opening at the top. The filter assembly includes an upper cup and a connector. The connector is hollow and extends vertically. Multiple connecting tubes are provided on the outside of the connector and are connected to the connector. A funnel is provided at the upper end of the connector and the lower end of the funnel is connected to the connector. A filter membrane is provided inside the funnel. The upper cup is detachably installed on the funnel and the upper cup and the funnel cooperate to clamp the filter membrane. The connector is connected to the bottle mouth.

2. The vacuum filter according to claim 1, characterized in that, A first sealing ring is provided between the upper cup and the funnel. The upper cup and the funnel cooperate to squeeze the first sealing ring, and the upper cup drives the first sealing ring to press the filter membrane.

3. The vacuum filter according to claim 2, characterized in that, The upper side of the first sealing ring is provided with an insertion groove, and the end of the upper cup is inserted into the insertion groove.

4. The vacuum filter according to claim 3, characterized in that, The lower side of the first sealing ring protrudes to form an abutment portion, a positioning ring protrudes from the inside of the funnel, the filter membrane is disposed inside the positioning ring, the abutment portion is sleeved with the positioning ring, and the abutment portion abuts against the filter membrane.

5. The vacuum filter according to claim 1, characterized in that, The funnel contains multiple support bars arranged radially and equidistantly circumferentially, and the filter membrane is disposed on the support bars.

6. The vacuum filter according to claim 5, characterized in that, A mesh is provided inside the funnel, and the mesh is positioned between the filter membrane and the support strip.

7. The vacuum filter according to claim 1, characterized in that, A sleeve is provided around the lower end of the upper cup, which is fitted onto the funnel. A locking post protrudes from the outer side of the funnel, and the sleeve engages with the locking post to install the upper cup onto the funnel.

8. The vacuum filter according to claim 7, characterized in that, The sleeve has a groove, and a buckle protrudes from one side wall of the groove. The buckle and the side wall of the groove cooperate to form a guide groove, which guides the locking pin to engage with the buckle.

9. The vacuum filter according to claim 1, characterized in that, The connector has a connecting tube at its lower end, which is threaded to the bottle opening. The inner wall of the connecting tube protrudes to form a limiting part. When the connecting tube is connected to the bottle opening, the end of the bottle opening abuts against the limiting part.

10. The vacuum filter according to claim 9, characterized in that, The limiting part is provided with a second sealing ring. When the bottle mouth is connected to the connecting pipe, the end of the bottle mouth presses against the second sealing ring.

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