Improved Eps filter

Abstract

The utility model discloses an improved eps filter, which belongs to the technical field of filters and is characterized in that a duckbill valve corresponding to a Luer lock interface is mounted in a plastic shell, a filter membrane bracket is fixedly mounted on one side of the duckbill valve, a filter membrane is fixedly mounted in the filter membrane bracket, a supporting layer is mounted on the outer side of the filter membrane bracket, and a plastic valve is fixedly mounted in the supporting layer; the waste of an eps extracting solution can be reduced, a filter membrane is replaced for multiple times, a large amount of liquid is left on the filter membrane, the vertical filter screen increases the filtering area, the liquid is better collected, the repeated filtering frequency is reduced, the pressurized splashing condition can be reduced during eps filtering, and the waste phenomenon caused by the splashing of a sample due to too high pressure is avoided. Meanwhile, the sanitation and safety of experimenters are also protected.

Description

Technical Field

[0001] This utility model relates to an improved EPS filter, belonging to the field of filter technology. Background Technology

[0002] Existing technology description: Due to the excessive impurities in activated sludge extracellular polymers (EPS), current laboratory extraction of EPS filtrate typically involves heating the sludge suspension in a water bath or treating the sludge suspension with ultrasound, followed by centrifugation. The supernatant is then filtered using a syringe filter under pressure, and finally the EPS filtrate is extracted. Even with centrifugation and extraction of the supernatant for EPS extraction, the extraction process remains very difficult.

[0003] Disadvantages: This method has the following disadvantages: First, the filter membrane needs to be replaced multiple times. Each time the filter membrane is filtered, some residual liquid remains on it. Second, if the same sample is filtered multiple times, the filtrate will remain at the filter port. Third, collecting small volume liquid samples is troublesome and leads to waste of filtrate.

[0004] Secondly, even if the supernatant is centrifuged and filtered during syringe pressure filtration, there are still many large-diameter impurities in the supernatant, which can clog the filter screen. In mild cases, multiple filter membrane replacements and filtrations may be required, while in severe cases, excessive pressure may cause the filtrate to splash when pressure is applied, resulting in the complete loss of the sample.

[0005] Therefore, an improved EPS filter is needed to address the above-mentioned shortcomings. Utility Model Content

[0006] The main purpose of this invention is to provide an improved EPS filter.

[0007] The objective of this utility model can be achieved by adopting the following technical solution:

[0008] An improved EPS filter includes a Luer lock interface for limiting position, with a Luer lock interface and an outlet respectively installed at both ends of the Luer lock interface;

[0009] A duckbill valve is installed inside the plastic housing, corresponding to the Luer lock interface. A filter membrane support is fixedly installed on one side of the duckbill valve. A filter membrane is fixedly installed inside the filter membrane support. A support layer is installed on the outside of the filter membrane support. A plastic valve is fixedly installed inside the support layer.

[0010] Preferably, the interior of the plastic shell and the Luer lock interface is circular with a diameter of 0.45μm.

[0011] Preferably, the support layer is a porous structure with a plastic mesh structure below the filter membrane.

[0012] Preferably, the duckbill valve is used for sample introduction and regulation to prevent water backflow.

[0013] Preferably, the duckbill valve is located at the inlet of the Luer lock interface.

[0014] Preferably, the support layer is a plastic mesh structure located below the plastic flap, used to support the filter screen.

[0015] Preferably, the Luer lock interface needle and the duckbill valve are tightly connected by a rotary lock.

[0016] The beneficial technical effects of this utility model are as follows:

[0017] This utility model provides an improved EPS filter.

[0018] 1-eps extract waste will be reduced. With multiple filter membrane replacements, a lot of liquid will remain on the filter membrane. The vertical filter screen increases the filtration area and collects liquid better, reducing the number of repeated filtrations.

[0019] 2-EPS filtration can reduce pressure splashing, preventing samples from splashing out due to excessive pressure and causing waste. It also protects the hygiene and safety of laboratory personnel. Attached Figure Description

[0020] Figure 1 This is an exploded perspective view of the overall structure of a preferred embodiment of an EPS modified filter according to the present invention.

[0021] Figure 2 This is a schematic diagram of the interior of the housing of a preferred embodiment of an improved EPS filter according to the present invention;

[0022] Figure 3 This is a partial three-dimensional structural diagram of a preferred embodiment of an EPS improved filter according to the present invention.

[0023] In the diagram: 1. Luer lock interface; 2. Plastic shell; 3. Duckbill valve; 4. Filter membrane support; 5. Filter membrane; 6. Plastic flap; 7. Support layer; 8. Outlet. Detailed Implementation

[0024] To enable those skilled in the art to understand the technical solution of this utility model more clearly, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of this utility model is not limited thereto.

[0025] like Figure 1 - Figure 3 As shown, this embodiment provides an improved EPS filter, which includes a Luer lock interface 1 for limiting the position, and Luer lock interface 1 and outlet 8 are respectively installed at both ends of Luer lock interface 1.

[0026] Inside the plastic housing 2, a duckbill valve 3 is installed corresponding to the Luer lock interface 1. A filter membrane support 4 is fixedly installed on one side of the duckbill valve 3. A filter membrane 5 is fixedly installed inside the filter membrane support 4. A support layer 7 is installed on the outside of the filter membrane support 4. A plastic valve 6 is fixedly installed inside the support layer 7.

[0027] The interior of the plastic shell 2 and the Luer lock interface 1 is circular with a diameter of 0.45μm.

[0028] The support layer 7 is a porous structure with a plastic mesh structure located below the filter membrane 5.

[0029] The duckbill valve 3 is used for sample introduction and adjustment to prevent water backflow.

[0030] The duckbill valve 3 is located at the entrance of the Luer lock interface 1.

[0031] The support layer 7 is a plastic mesh structure located below the plastic flap 6 and is used to support the filter screen.

[0032] The Luer lock interface 1 pin is tightly connected to the duckbill valve 3 via a rotary lock.

[0033] like Figure 1 - Figure 3 As shown, the working process of the improved EPS filter provided in this embodiment is as follows:

[0034] Step 1: After the liquid enters, it passes through the duckbill valve 3 into the filter chamber and is filtered through the 0.45μm fiber filter screen 5.

[0035] At this point, the fiber filter traps particulate matter, impurities, and microorganisms, ensuring the filtered liquid is clean.

[0036] Tools: A pressure controller is optional, used to adjust the pressure and flow rate of the liquid passing through the filter membrane 5.

[0037] Material: 0.45μm fiber filter screen. Change the filter screen pore size as needed.

[0038] Process parameters: The pressure of the liquid passing through filter screen 5 must be controlled within the range that the filter membrane can withstand. It is generally recommended to be 0.5 to 2 bar. Adjustments should be made according to the liquid properties, membrane material and filtration requirements to ensure stable flow rate and discharge of filtrate.

[0039] Step 2: The filtered liquid passes through the support layer and flows out of the filter outlet through the plastic valve 6 to prevent backflow, and enters the syringe or downstream system.

[0040] Tools: Downstream liquid collection equipment, syringe, receiving bottle or infusion bag.

[0041] Materials: Collection container, connecting pipes.

[0042] Process parameters: Ensure the discharged liquid is free of impurities, observe changes in liquid color or transparency, adjust filtration time and flow rate, and perform sealing and backflow detection.

[0043] Step 3: Check the filter's sealing and liquid backflow. After filtering the liquid, observe whether there is any backflow and ensure that there is no leakage from the interface or gaps.

[0044] Tools: Pressure tester; sealing test equipment is optional.

[0045] Materials: Rubber or plastic sealing rings.

[0046] Process parameters: The test pressure is controlled below the system's rated pressure. The compression state of the sealing ring is checked to confirm that there is no liquid leakage.

[0047] Example: Figure 1 - Figure 3 As shown, a plastic housing 2 is installed on the outer end of the Luer lock interface 1. Inside the plastic housing 2, a duckbill valve 3, a filter membrane support 4, a filter membrane 5, a plastic valve 6, and an outlet 8 are stacked and distributed. The outlet 8 is sealed on the outer end of the plastic housing 2.

[0048] The device includes a circular 0.45μm diameter fiber filter screen that can be replaced as needed; a small duckbill valve 3 made of rubber or plastic; a plastic shell; a plastic valve 6; a filter membrane support 4; a support layer 7 made of plastic mesh structure; and a Luer lock interface 1.

[0049] The Luer lock interface 1 needle is the filter inlet and is designed as a connector that can be connected to a needle or syringe.

[0050] A small rubber or plastic duckbill valve 3 is used for sample injection and to regulate the flow of water backflow. When liquid is injected, the duckbill valve 3 is open; when there is no fluid pressure, the duckbill valve 3 is closed to prevent liquid backflow.

[0051] The 0.45μm diameter circular fiber filter screen is the core component of the filter and is used to filter EPS suspensions, trapping unwanted particles or impurities.

[0052] The filter membrane support 4 is also made of plastic and is used to fix the filter membrane 5 and keep it in position, so that the filter membrane 5 can work stably in the filter housing and prevent displacement.

[0053] The plastic flap 6 is used to hold the filter screen in place and further prevent liquid backflow.

[0054] The support layer is a porous structure of plastic mesh located below the filter membrane. It is used to support the filter membrane 5 and prevent it from cracking or deforming under high pressure.

[0055] The filter housing is used to house the filter membrane 5 and provide overall structural support for the filter. A sealing ring is added to the filter housing to ensure the housing is sealed and prevent liquid from leaking from the seams.

[0056] ②The relationship between the configurations of these parts.

[0057] Luer Lock Interface 1 needle inlet, located at the filter inlet, is designed as a connector for a tight connection with a syringe or needle.

[0058] A small rubber or plastic duckbill valve 3 is located at the inlet of the filter and connected to the Luer lock interface 1.

[0059] A circular 0.45μm fiber filter screen is installed in the center of the filter and serves as the core component of the filtration process. It is fixed on the filter membrane support 4.

[0060] The filter membrane support 4 is made of plastic and can directly contact the fiber filter screen, located inside the filter.

[0061] The support layer 7, a plastic mesh structure, is located below the plastic flap 6 and is used to support the filter screen.

[0062] The plastic valve 6 is installed below the filter membrane support 4.

[0063] The filter housing, made of plastic, houses all internal components, serving as an external part that provides support for the overall structure and features a funnel-shaped plastic liquid outlet.

[0064] The sealing ring provides a seal at the connection point of the filter housing.

[0065] ③ The connection forms between these components, such as the connection relationships.

[0066] The Luer lock interface needle is securely connected to the small duckbill valve 3 via a twist-lock mechanism. The Luer lock interface 1 ensures a secure connection of the syringe or needle, while the duckbill valve 3 controls the unidirectional flow of the liquid.

[0067] The duckbill valve 3 is connected to the filter membrane holder 4 via a plastic sleeve and is secured using a snap-fit ​​or embedded structure. The duckbill valve 3 allows liquid to enter the filter membrane holder 4 while preventing liquid backflow.

[0068] The fiber filter screen is fixed on the filter membrane support 4. The support securely fixes the filter screen with a snap-fit ​​design. The main function of the filter membrane support 4 is to support and fix the filter screen to ensure that the filter screen does not shift under fluid pressure.

[0069] The porous support layer 7 below the filter membrane holder 4 is fixed in an embedded manner, and the support layer 7 fits tightly with the filter membrane holder 4.

[0070] The support layer helps withstand liquid pressure, preventing the filter from being damaged by excessive pressure during the filtration process.

[0071] The filter membrane support 4 and the plastic valve 6 are connected to the filter membrane support 4 by a snap fastener and are located above the filter screen. The plastic valve 6 fixes the filter screen and prevents backflow, ensuring that the liquid flows in only one direction.

[0072] The filter membrane holder 4 and the support layer are embedded inside the filter housing and secured by a tight fit and sealing ring to ensure the stability of the entire internal assembly. The housing protects all internal structures and prevents liquid leakage through the sealing ring.

[0073] The sealing ring is installed at the joint of the outer shell and fixed by compression to ensure that the filter will not leak under high pressure and to maintain the system's airtightness.

[0074] The liquid is pressurized through a syringe and injected into the Luer lock interface 1 needle, which is tightly connected to the filter inlet.

[0075] The duckbill valve 3 ensures that the liquid can only flow in one direction, preventing the liquid from flowing backward or air bubbles from entering the system. Once the liquid enters, the duckbill valve 3 will open automatically.

[0076] The liquid flows through the filter membrane support 4 and the fiber filter screen, where the pore size of the fiber filter screen is 0.45μm, which can effectively trap particles, impurities or microorganisms in the liquid, ensuring the purity of the filtered EPS filtrate.

[0077] The filter membrane support 4 fixes the filter screen to ensure stability during the filtration process, while the support layer 7 supports the filter screen to prevent it from breaking or deforming due to pressure during the filtration process.

[0078] The filtered liquid continues to pass through the support layer 7 and the plastic valve 6. The plastic valve 6 further ensures that the liquid does not flow backward, thus playing a secondary role in preventing backflow.

[0079] The filtered liquid flows out of the filter outlet and into the downstream container.

[0080] The sealing ring ensures that the filter remains completely sealed throughout the entire operation, preventing any liquid from leaking from the seams or interfaces.

[0081] The above description is only a further embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the scope disclosed by the present utility model, based on the technical solution and concept of the present utility model, shall fall within the protection scope of the present utility model.

Claims

1. An improved EPS filter, comprising a Luer lock port (1) for limiting position, wherein the two ends of the Luer lock port (1) are respectively fitted with a Luer lock port (1) and an outlet (8). Its features are: A duckbill valve (3) is installed inside the plastic shell (2) corresponding to the Luer lock interface (1). A filter membrane support (4) is fixedly installed on one side of the duckbill valve (3). A filter membrane (5) is fixedly installed inside the filter membrane support (4). A support layer (7) is installed on the outside of the filter membrane support (4). A plastic valve (6) is fixedly installed inside the support layer (7).

2. The improved EPS filter according to claim 1, characterized in that: The interior of the plastic shell (2) and the Luer lock interface (1) is circular with a diameter of 0.45 μm.

3. The improved EPS filter according to claim 2, characterized in that: The support layer (7) is a porous structure with a plastic mesh structure below the filter membrane (5).

4. The improved EPS filter according to claim 3, characterized in that: The duckbill valve (3) is used for sample injection and regulation to prevent water backflow.

5. The EPS improved filter according to claim 4, characterized in that: The duckbill valve (3) is located at the inlet of the Luer lock interface (1).

6. The improved EPS filter according to claim 5, characterized in that: The support layer (7) is a plastic mesh structure and is located below the plastic valve (6) to support the filter screen.

7. An improved EPS filter according to claim 6, characterized in that: The Luer lock interface (1) needle and the duckbill valve (3) are tightly connected by a rotary lock.

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