Microorganism detection filtering device

Abstract

The utility model relates to a microbiological detection filtering device. According to the scheme, the microbiological detection filtering device comprises a filtering cup body, a filtering membrane and a filtering seat, a filter seat is mounted at the bottom of the filter cup body; a rib-shaped supporting structure for supporting the filter membrane is arranged on the filter seat, a liquid outlet hole is formed in the center of the rib-shaped supporting structure, and the height of the rib-shaped supporting structure is gradually reduced from the outer ring of the filter seat to the circle center; and the filter membrane is arranged between the filter cup body and the filter seat. The problem that the aperture of the filter membrane becomes large during filtration due to non-uniform support of the filter membrane can be solved, the filtering area of liquid passing through the filter membrane can be ensured, and liquid residues can be reduced.

Description

Technical Field

[0001] This application relates to the field of filtration equipment, specifically to a microbial detection filtration device. Background Technology

[0002] Microbiological testing plays a crucial role in numerous fields, including pharmaceuticals, medical devices, food, drinking water, and the environment. Its accuracy is of paramount importance in safeguarding public health and product quality. Filtration devices are indispensable in the microbiological testing process, and their performance directly impacts the testing results.

[0003] The market currently offers a wide variety of microbial testing filters, but many of them suffer from numerous drawbacks. Regarding sealing performance, most products experience leakage or seepage during filtration, easily leading to significant liquid accumulation. This not only results in sample loss and interferes with the accuracy of test results, but also increases operational complexity and the risk of secondary contamination during membrane removal, as liquid drips onto the filter membrane or workbench, seriously threatening testing reliability and laboratory environmental safety.

[0004] From the perspective of filter membrane support architecture, common support structures include radial, annular, and dotted structures. Radial supports are difficult to evenly support the filter membrane, resulting in uneven stress on various parts of the membrane. The pore size is easily stretched and enlarged during the filtration process, reducing the microbial retention effect and causing the experiment to fail. Although annular and dotted structures can effectively support the filter membrane, their layout reduces the filtration area, hinders the smooth passage of liquid, limits the flow rate, and easily leaves liquid residue at the base of the support structure, causing liquid accumulation and contamination risks, affecting detection efficiency and quality.

[0005] Given the significant deficiencies of existing microbial detection filtration devices in terms of sealing and filter membrane support, there is an urgent need to develop a new device that can effectively overcome these problems, thereby improving the accuracy, efficiency, and convenience of microbial detection and meeting the stringent requirements of microbial detection work in various fields. Utility Model Content

[0006] The purpose of this application is to provide a microbial detection and filtration device to address the aforementioned problems existing in the prior art.

[0007] To achieve the above-mentioned objectives, this application adopts the following technical solution: a microbial detection filtration device includes a filter cup, a filter membrane, and a filter base;

[0008] A filter base is installed at the bottom of the filter cup;

[0009] The filter base is provided with a ribbed support structure for supporting the filter membrane. The ribbed support structure has a liquid outlet hole at its center, and the height of the ribbed support structure gradually decreases from the outer circle of the filter base to the center.

[0010] The filter membrane is placed between the filter cup and the filter base.

[0011] Further, the filter seat is provided with a concave surface, and the rib-shaped support structure is arranged on the concave surface.

[0012] Further, the rib-shaped support structure comprises inclined guide ribs and V-shaped guide ribs, which are uniformly spaced along the circumferential direction of the filter seat.

[0013] Further, the V-shaped guide ribs are located in the area close to the liquid outlet hole, and the inclined guide ribs are located in the area close to the outer circle of the filter seat.

[0014] Further, the bottom of the filter cup is provided with a film pressing rib, and the filter seat is provided with a corresponding circle of film pressing planes to realize the pressing and fixing of the filter film.

[0015] Further, the bottom of the filter cup is also provided with an annular buckle, and the filter seat is provided with an annular groove matched with the annular buckle, and the connection is realized through the matching of the annular buckle and the annular groove of the filter seat.

[0016] Further, the filter seat is provided with a film taking notch to make the outer circle part of the filter film suspended, so as to facilitate the taking of the film.

[0017] Further, the top of the filter cup is provided with a cup mouth rib position, and the bottom is provided with a cup bottom rib position.

[0018] Further, the top of the filter cup is provided with an annular skirt.

[0019] Further, the bottom of the filter seat is provided with an annular ring, which is located between the liquid outlet and the edge of the filter seat.

[0020] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0021] 1. Precise support ensures accurate experiment: the unique arrow-shaped rib position of the filter seat is uniformly distributed to create an ideal support environment for the filter film. During the whole filtration process, the force on each point of the filter film is uniform and constant, effectively preventing the abnormal increase of the filter film pore size and maintaining the stability of the microbial retention efficiency, laying a solid foundation for the precision of microbial detection and greatly improving the reliability and reproducibility of experimental data, effectively avoiding the risk of misjudgment caused by the fluctuation of filter film pore size, and helping to promote the efficient progress of scientific research and detection work.

[0022] 2. Efficient filtration saves experiment time: the arrow-shaped rib position is carefully planned and laid out to maximize the liquid filtration area while firmly supporting the filter film, significantly reducing the resistance of the liquid flowing through. Compared with the traditional structure, it can accelerate the liquid filtration speed, greatly shorten the single filtration period, greatly improve the overall detection efficiency in batch detection or in experimental scenarios with strict time requirements, optimize the work process, reduce the consumption of manpower and time cost, and enhance the experiment turnover rate and output efficiency.

[0023] 3. Excellent diversion and liquid residue elimination: The slanting diversion ribs of the filter seat arrow-shaped ribs and the funnel inclined surface of the bottom surface are precisely matched, and the liquid flow direction is accurately planned according to the principle of fluid mechanics. During the filtration operation, the liquid is quickly and directionally migrated under the strong driving, the liquid residue problem after the filtration is completely eliminated, the cross contamination of the sample and the corrosion hazard of the equipment derived from the accumulated liquid are avoided, the detection equipment is kept clean and dry, the service life of the device is prolonged, the independence and accuracy of each detection are ensured, and the safety and standardization of the experimental environment are improved.

[0024] 4. Stable sealing to prevent leakage and pollution: The filter cup bottom film pressing rib and the annular buckle are closely cooperated with the filter seat to build a tight and seamless sealing system, which fully blocks the liquid seepage and leakage channel, and effectively safeguards the integrity and purity of the detection sample. Even under the harsh working condition of high negative pressure filtration, the sealing of the device is as firm as a rock, which eliminates the sample loss and environmental pollution caused by liquid leakage, effectively maintains the reliability of the detection results, simplifies the experimental cleaning process, and improves the operation efficiency and quality of the laboratory. BRIEF DESCRIPTION OF DRAWINGS

[0025] Fig. 1 is the exploded view of the present application;

[0026] Fig. 2 is the internal structure diagram of the present application;

[0027] Fig. 3 is the filter cup structure diagram of the present application;

[0028] Fig. 4 is the filter seat diagram of the present application;

[0029] Fig. 5 is the filter seat top view of the present application.

[0030] In the figure, 1, cup cover; 2, filter cup; 3, filter membrane; 4, filter seat; 21, annular skirt; 22, cup mouth rib position; 23, cup bottom rib position; 24, annular buckle; 25, film pressing rib; 41, rib-shaped support structure; 411, slanting diversion rib; 412, “V” shaped diversion rib; 413, diversion channel; 42, annular film taking notch; 43, funnel inclined surface; 44, annular ring; 45, liquid outlet; 46, annular groove. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art belong to the scope of protection of the present application.

[0032] Those skilled in the art should understand that, in the disclosure of this application, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this application.

[0033] like Figs. 1-3 As shown, this microbial detection filtration device consists of a cup lid 1, a filter cup body 2, a filter base 4, and a filter membrane 3. The cup lid 1 is fastened onto the cup mouth rib 22 at the top opening of the filter cup body 2. The filter membrane 3 is placed on the ribbed support structure 41 of the filter base 4 and then fastened into the filter cup body 2. After being packaged and sealed, it can be sterilized.

[0034] In this embodiment, the ribbed support structure 41 includes oblique flow guide ribs 411 and "V"-shaped flow guide ribs 412, both evenly spaced along the circumference of the filter base 4. Two adjacent oblique flow guide ribs 411 can form an "eight"-shaped structure. Two oblique flow guide ribs 411 form a group, with the length gradually decreasing from the outer circle to the inner circle of the filter base 4. Near the center, "V"-shaped flow guide ribs 412 are set. A flow guide channel 413 is set between adjacent groups, which can directly reach the liquid outlet 45. The oblique flow guide ribs 411 and "V"-shaped flow guide ribs 412 form an arrow-shaped rib position, which can evenly distribute and support the filter membrane 3. It can evenly support the filter membrane 3 during filtration, avoid the pore size of the filter membrane 3 from increasing during filtration, and ensure the accuracy of the experiment. Moreover, it can ensure the effective filtration area when the liquid passes through the filter membrane 3, increase the flow rate, and save experimental time. The filter base 4 has a concave surface, and a ribbed support structure 41 is located on this concave surface (the bottom funnel-shaped inclined surface 43). The height of the ribbed support structure 41 gradually decreases from the outer ring of the filter base 4 to the center. The design of the arrow-shaped ribs is inspired by the flow principle of rivers in nature. Similar to the V-shaped riverbed at the bottom, the bottom of the arrow-shaped ribs also presents a V-shape. The advantage of this design is that when liquid flows through, the pressure of the liquid flow is concentrated at the bottom of the channel, thereby increasing the liquid flow velocity and improving the drainage capacity.

[0035] Preferably, the arrow-shaped inclined guide ribs 411, in conjunction with the bottom funnel inclined surface 43, accelerate the liquid flow rate and effectively avoid liquid residue after filtration.

[0036] Preferably, the filter cup bottom is provided with a film pressing rib 25, and the filter seat 4 is provided with a corresponding circle of film pressing planes to achieve the pressing and fixing of the filter membrane 3. The filter cup 2 bottom is also provided with an annular buckle position 24, and the filter seat 4 is provided with an annular groove matched with the annular buckle position 24, and the connection is achieved through the matching of the annular buckle position 24 and the annular groove of the filter seat 4. In this way, the filter cup 2 bottom is designed with the film pressing rib 25 and the annular buckle position 24 matched with the filter seat 4 to avoid liquid leakage and prevent liquid from dripping onto the filter membrane 3 or the workbench when the membrane is taken, thereby avoiding secondary pollution.

[0037] Preferably, the filter seat 4 is provided with a membrane taking notch to make the outer circle of the filter membrane 3 suspended and freely taken in 360 degrees.

[0038] Preferably, the filter cup 2 top is provided with a cup mouth rib position 22, and the bottom is provided with a cup bottom rib position 23 to effectively strengthen the buckle strength and avoid liquid leakage when the filter cup 2 buckle loosens during negative pressure filtration. The cup mouth rib position 22 can conveniently install the cup cover 1.

[0039] Preferably, the filter seat 4 bottom is provided with an annular ring 44 located between the liquid outlet 45 and the edge of the filter seat 4, which can be matched with the pump head in a common thread matching or interference fit or buckle fit.

[0040] Preferably, the filter cup 2 top is provided with an annular skirt 21 to facilitate the disassembly and separation of the filter cup 2 and the filter seat 4.

[0041] Use: open the packaging bag, take out the microorganism detection filter, hold the filter seat 4, rotate and press down to install on the pump head, pour the liquid to be filtered into the filter cup 2, operate the equipment to perform filtration, and stop the equipment after filtration. If the filter membrane 3 needs to be washed after the sample filtration is completed, pour the washing liquid into the filter cup 2, and operate the equipment again to perform filtration to complete the washing. After all the filtration is completed, hold the annular skirt 21 of the filter cup 2 with your hand, force it to the upper oblique direction, so that the filter cup 2 is separated from the filter seat 4, use a sterile forceps to clamp the edge of the filter membrane 3 from the membrane taking notch of the filter seat 4, and paste the filter membrane 3 with the bacteria surface upward on a suitable agar medium plate for culture or further test. Rotate the filter seat 4 to the upper direction to take it off, and the operation is completed.

[0042] The part not described in detail in the present application is the prior art, and therefore the present application does not describe it in detail.

[0043] It can be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of one element can be one, and in another embodiment, the number of the element can be multiple, and the term "one" cannot be understood as a limitation on the number.

[0044] Although the terms cup cover 1, filter cup body 2, filter membrane 3, filter seat 4, annular skirt 21, cup mouth rib position 22, cup bottom rib position 23, annular buckle position 24, membrane pressing rib 25, rib-shaped support structure 41, oblique flow guide rib 411, "V"-shaped flow guide rib 412, flow guide channel 413, annular membrane taking notch 42, funnel inclined surface 43, annular ring 44, liquid outlet 45, annular groove 46, etc. are used more frequently in this document, the possibility of using other terms is not excluded. The use of these terms is only for the convenience of describing and explaining the essence of the present application; any interpretation of them as any kind of additional limitation is contrary to the spirit of the present application.

[0045] The present application is not limited to the above-mentioned best mode of implementation, and anyone can derive other various forms of products under the inspiration of the present application, but regardless of any change in shape or structure, any technical solution with the same or similar to the present application falls within the scope of protection of the present application.

Claims

1. A microorganism detection filtration device, characterized by, The filter cup, the filter membrane and the filter seat are included; The filter seat is installed at the bottom of the filter cup; The filter seat is provided with a rib-shaped support structure for supporting the filter membrane, the rib-shaped support structure is provided with a liquid outlet hole at the center, and the rib-shaped support structure gradually decreases from the outer circle of the filter seat to the center height; The filter membrane is arranged between the filter cup and the filter seat.

2. The microbial detection filtration device of claim 1, wherein, The filter seat is provided with a concave surface, and the rib-shaped support structure is arranged on the concave surface.

3. The microbial detection filtration device of claim 1, wherein, The rib-shaped support structure includes inclined flow guide ribs and "V"-shaped flow guide ribs, which are uniformly spaced along the circumferential direction of the filter seat.

4. The microbial detection filtration device of claim 3, wherein, The "V"-shaped flow guide rib is located in the area close to the liquid outlet hole, and the inclined flow guide rib is located in the area close to the outer circle of the filter seat.

5. The microbial detection filtration device of claim 1, wherein, The filter cup bottom is provided with a film pressing rib, and the filter seat is provided with a corresponding circle of film pressing plane to realize the pressing and fixing of the filter membrane.

6. The microbial detection filtration device of claim 5, wherein, The bottom of the filter cup is also provided with an annular buckle, and the filter seat is provided with an annular groove matched with the annular buckle, and the connection is realized by the cooperation of the annular buckle and the annular groove of the filter seat.

7. The microbial detection filtration device of claim 1, wherein, The filter seat is provided with a film taking notch, so that the outer circle part of the filter membrane is suspended, and the film is convenient to take.

8. The microbial detection filtration device of any one of claims 1-7, wherein, The top of the filter cup is provided with a cup mouth rib, and the bottom is provided with a cup bottom rib.

9. The microbial detection filtration device of any one of claims 1-7, wherein, The top of the filter cup is provided with an annular skirt.

10. The microbial detection filtration device of any one of claims 1-7, wherein, The bottom of the filter seat is provided with an annular ring, which is located between the liquid outlet and the edge of the filter seat.

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