Filter device based on double-layer filtration

Abstract

The filtering device comprises a filtering assembly, a filtering cone, a collecting bottle, a vacuum suction filtration pump, a hose and a water blocking filter, the vacuum suction filtration pump is connected with the filtering assembly through the hose, the hose is provided with the water blocking filter, and the filtering assembly comprises a first filtering element, a second filtering element and a sealing shell. The upper portion of the second filter element is connected with the filter cone, the first filter element is located below the second filter element, the first filter element and the second filter element are connected into the sealing shell in a threaded fit mode, and a filtrate channel is formed in the first filter element and extends towards the collecting bottle. The second filter element performs primary filtration on the solution, the first filter element arranged below the second filter element is used for further filtering the solution flowing down from the second filter element, the filtration precision is improved, and the filtrate channel arranged in the first filter element is designed into a gradually narrowed shape. Therefore, the filtered liquid can be guided to smoothly flow to the collecting bottle.

Description

Technical Field

[0001] The utility model belongs to the technical field of filtering in biomedical testing, in particular to a filtering device based on double-layer filtering. Background Art

[0002] Filtration technology is a commonly used detection technology in biomedical testing. When conducting biomedical testing, the mixed solution usually needs to be filtered before use due to the presence of impurities. At this time, a filtering device is needed. The filtering device generally includes an upper cup and a receiving bottle located below it, with a filtering structure between the two. After the experimental fluid is poured into the upper cup, it is filtered by the filtering structure, and the fine solid particles and other impurities therein are isolated, and the filtered solution drips into the receiving bottle.

[0003] In Chinese patent document CN104353282A, a filling closed system aseptic filtration equipment is disclosed, comprising a batching tank, a pressure device, and a two-stage filtration device connected in sequence, wherein the batching tank and the two-stage filtration device are connected via a conduit, and the conduit portion between the batching tank and the two-stage filtration device extends into the interior of the pressure device, and the pressure device is a peristaltic pump; the filling closed system aseptic filtration equipment also includes a buffer device connected to the two-stage filtration device via a conduit; the two-stage filtration device includes a redundant filter and a main filter connected in series with the redundant filter.

[0004] In the above technical solution, although it can ensure that the solution is filtered under sterile conditions after pressurization, and the filtration speed of the filtrate can be adjusted in real time, the safety performance is high, the solution residue is small, and the pressure of the whole system is stable. However, in the specific use process, when filtering different solutions, in order to avoid cross contamination, multiple sets of devices are still required, and the filtering structure has not been improved, and there are still problems of low filtering efficiency and insufficient filtering accuracy.

[0005] Therefore, it is necessary to develop a new filtering device that can filter different solutions without changing the filtering equipment during solution filtering, thereby improving the filtering efficiency and filtering accuracy. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a filtering device based on double-layer filtration which can effectively improve the filtering efficiency and filtering accuracy when filtering a solution.

[0007] In order to solve the above technical problems, the technical solution adopted by the utility model is: a filtering device based on double-layer filtration, including a filtering assembly, a filter bucket, a collecting bottle, a vacuum filtration pump, a hose and a water-blocking filter, the vacuum filtration pump is connected to the filtering assembly through the hose, the hose is provided with the water-blocking filter, the filtering assembly includes a first filter element, a second filter element and a sealing shell, the second filter element is connected to the filter bucket at the top, the first filter element is located below the second filter element, a filtrate channel is provided in the first filter element, and the filtrate channel extends toward the collecting bottle.

[0008] The double-layer filtering structure of the filtering device based on double-layer filtering is composed of a first filtering element and a second filtering element. The second filtering element performs primary filtering on the solution. The first filtering element arranged below the second filtering element is used to further filter the solution flowing down from the second filtering element, thereby improving the filtering accuracy. The filtrate channel arranged inside the first filtering element is designed to be gradually narrowed in order to guide the filtered liquid to flow smoothly to the collecting bottle. The collecting bottle collects the solution after two-stage filtration. During the entire filtering process, the vacuum filtration pump is connected to the filtering assembly through a hose, providing continuous and steady pressure to the filtering assembly, so that the solution passes through the filtering assembly smoothly during filtration, thereby improving the filtering efficiency. The water-blocking filter arranged on the hose is used to prevent the filtrate from flowing back.

[0009] Preferably, a first internal thread is provided on the inner side of the upper end of the first filter element, a filter layer is provided below the first internal thread, an inverted cone-shaped groove is connected below the filter layer, and the groove is connected to the filtrate channel.

[0010] Preferably, the filter layer includes a first filter screen, a second filter screen and a filter middle layer, the first filter screen and the second filter screen are both provided with filter holes, the filter holes on the first filter screen and the second filter screen are of the same size and aligned in position, the upper surface of the filter middle layer is in contact with the first filter screen, and the lower surface of the filter middle layer is in contact with the second filter screen.

[0011] The multi-layer structure design of the filter layer significantly improves the filtration accuracy. The design of the filter middle layer can further intercept smaller impurity particles and adsorb soluble impurities. Through this structural design, efficient interception and removal of various impurities are achieved.

[0012] Preferably, the upper end of the second filter element has an outwardly protruding clamping ring, the lower surface of the clamping ring is in contact with the upper end of the sealing shell, the filter layer is arranged below the clamping ring, the outer edge of the filter layer is provided with a second external thread, and the first external thread used in conjunction with the first internal thread is provided below the second external thread.

[0013] Preferably, the inner peripheral edge of the sealing shell has a second internal thread used in conjunction with the second external thread, the first filter element and the second filter element are connected in the sealing shell through threaded cooperation, and the sealing shell has an air suction hole, the position of the air suction hole is higher than the bottom of the filtrate channel, and the sealing shell is connected to the hose through the air suction hole.

[0014] Preferably, the filtering accuracy of the first filter element is greater than that of the second filter element.

[0015] The double-layer filtration design is intended to improve filtration accuracy, and the first filter element and the second filter element are detachably connected in the sealed housing through threaded cooperation. This connection method allows the filter element to be installed or removed simply by rotating the thread when filtering different solutions, without the need to prepare multiple sets of equipment, thereby improving filtration efficiency.

[0016] Preferably, the hose includes a first hose and a second hose.

[0017] Preferably, the water-blocking filter is a bottle-shaped structure, including a head and a bottle body, the head is provided with an air inlet pipe and an air outlet pipe, the air outlet pipe is connected to the vacuum filtration pump through the first hose, and the air inlet pipe is connected to the filter assembly through the second hose.

[0018] Preferably, the air inlet pipe and the air outlet pipe are both right-angle structures.

[0019] A water-blocking filter is connected between the vacuum filtration pump and the filter assembly through two hoses. Its function is to prevent the solution from flowing back or reversely during filtration. The head and bottle body design of the water-blocking filter increases the sealing performance. The right-angle design of the air inlet pipe and the air outlet pipe can effectively reduce the turbulence and resistance of the liquid during the flow process, improve the efficiency of fluid transmission, enhance the stability of the pipeline connection, and reduce the risk of pipeline falling off or leakage under high pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings:

[0021] Figure 1 It is a main structural diagram of a filtering device based on double-layer filtration;

[0022] Figure 2 yes Figure 1 A schematic cross-sectional view of the middle filter hopper, filter assembly and collection bottle;

[0023] Figure 3 yes Figure 1 A schematic diagram of the main structure of the filtering component in FIG.

[0024] Figure 4 yes Figure 3 The cross-sectional structure of Figure 1 ;

[0025] Figure 5 yes Figure 3 The cross-sectional structure of Figure 2 ;

[0026] Figure 6 yes Figure 3 Schematic diagram of the main structure after removing the sealing shell;

[0027] Figure 7 yes Figure 6 A schematic cross-sectional structure diagram of;

[0028] Figure 8 yes Figure 6 Schematic diagram of the cross-sectional structure when used with filter paper;

[0029] Wherein: 1-filter bucket, 2-collecting bottle, 3-vacuum filtration pump, 4-water blocking filter, 5-first filter element, 6-second filter element, 7-sealing shell, 8-filtrate channel, 9-first internal thread, 10-filter layer, 11-groove, 12-first filter net, 13-second filter net, 14-filter middle layer, 15-filter hole, 16-clamp ring, 17-second external thread, 18-first external thread, 19-second internal thread, 20-exhaust hole, 21-first hose, 22-second hose, 23-head, 24-bottle body, 25-inlet pipe, 26-outlet pipe, 27-filter paper. DETAILED DESCRIPTION

[0030] As attached Figure 1-8 As shown, the filtering device based on double-layer filtration of this embodiment includes a filtering assembly, a filter bucket 1, a collecting bottle 2, a vacuum filtration pump 3, a hose and a water-blocking filter 4, the vacuum filtration pump 3 is connected to the filtering assembly through the hose, and the hose is provided with a water-blocking filter 4, and is characterized in that the filtering assembly includes a first filter element 5, a second filter element 6 and a sealing shell 7, the second filter element 6 is connected to the filter bucket 1 at the top, the first filter element 5 is located below the second filter element 6, and a filtrate channel 8 is provided in the first filter element 5, and the filtrate channel 8 extends toward the collecting bottle 2.

[0031] During specific use, the second filter element 6 performs primary filtration on the solution, and the first filter element 5 arranged below the second filter element 6 is used to further filter the solution flowing down from the second filter element 6. The filtrate channel 8 arranged inside the first filter element 5 is designed to be gradually narrowed, so as to facilitate guiding the filtered liquid to flow smoothly to the collecting bottle 2. The collecting bottle 2 collects the solution after two-stage filtration. During the entire filtration process, the vacuum filtration pump 3 is connected to the filter assembly through the hose to provide continuous and stable pressure for the filter assembly, so that the solution can pass through the filter assembly smoothly during filtration. The water-blocking filter 4 arranged on the hose is used to prevent the solution from flowing back during filtration.

[0032] Specific as Figure 2-5 As shown, a first internal thread 9 is provided on the inner side of the upper end of the first filter element 5, a filter layer 10 is provided below the first internal thread 9, an inverted cone-shaped groove 11 is connected below the filter layer 10, the groove 11 is connected to the filtrate channel 8, the filter layer 10 includes a first filter screen 12, a second filter screen 13 and a filter middle layer 14, the first filter screen 12 and the second filter screen 13 are both provided with filter holes 15, the filter holes 15 on the first filter screen 12 and the second filter screen 13 are of the same size and aligned in position, the upper surface of the filter middle layer 14 is in contact with the first filter screen 12, and the lower surface of the filter middle layer 14 is in contact with the second filter screen 13.

[0033] like Figure 6 , Figure 7 As shown, the upper end of the second filter element 6 has an outwardly protruding snap ring 16, the lower surface of the snap ring 16 is in contact with the upper end of the sealing shell 7, a filter layer 10 is arranged below the snap ring 16, the outer peripheral edge of the filter layer 10 is provided with a second external thread 17, and a first external thread 18 used in conjunction with the first internal thread 9 is provided below the second external thread 17.

[0034] like Figure 4 , Figure 5 As shown, the inner peripheral edge of the sealing shell 7 has a second internal thread 19 used in conjunction with the second external thread 17, the first filter element 5 and the second filter element 6 are connected in the sealing shell 7 through threaded cooperation, and the sealing shell 7 has an air suction hole 20, the position of the air suction hole 20 is higher than the bottom of the filtrate channel 8, and the sealing shell 7 is connected to the hose through the air suction hole 20.

[0035] The filtering accuracy of the first filter element 5 is greater than that of the second filter element 6; it should be noted that the filtering accuracy of the first filter element 5 and the filtering accuracy of the second filter element 6 are determined by the pore size of the specific filter membrane. In specific use, the second filter element 6 is first installed inside the sealing shell 7 by matching the second external thread 17 on the second filter element 6 with the second internal thread 19 on the sealing shell 7, and then the first filter element 5 is matched with the first internal thread 9 on the first filter element 5 through the first external thread 18 on the second filter element 6, and installed at the lower end of the second filter element 6. When filtering the solution, a layer of filter paper 27 needs to be laid on the second filter element 6 and the first filter element 5 respectively.

[0036] like Figure 1 As shown, the hose includes a first hose 21 and a second hose 22, the water-blocking filter 4 is a bottle-shaped structure, including a head 23 and a bottle body 24, the head 23 is provided with an air inlet pipe 25 and an air outlet pipe 26, the air outlet pipe 26 is connected to the vacuum filtration pump 3 through the first hose 21, the air inlet pipe 25 is connected to the filter assembly through the second hose 22, and the air inlet pipe 25 and the air outlet pipe 26 are both designed as a right-angle structure.

[0037] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only a specific embodiment of the utility model and is not intended to limit the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A filtering device based on double-layer filtration, comprising a filtering assembly, a filter bucket, a collecting bottle, a vacuum filtration pump, a hose and a water-blocking filter, wherein the vacuum filtration pump is connected to the filtering assembly through the hose, and the water-blocking filter is arranged on the hose, characterized in that: The filter assembly includes a first filter element, a second filter element and a sealed shell. The second filter element is connected to the filter bowl at the top, and the first filter element is located below the second filter element. A filtrate channel is provided in the first filter element, and the filtrate channel extends toward the collecting bottle.

2. The filtration device based on double-layer filtration according to claim 1, characterized in that: A first internal thread is provided on the inner side of the upper end of the first filter element, a filter layer is provided below the first internal thread, an inverted cone-shaped groove is connected below the filter layer, and the groove is connected to the filtrate channel.

3. The filtration device based on double-layer filtration according to claim 2, characterized in that: The filter layer includes a first filter screen, a second filter screen and a filter middle layer. The first filter screen and the second filter screen are both provided with filter holes. The filter holes on the first filter screen and the second filter screen are of the same size and aligned in position. The upper surface of the filter middle layer is in contact with the first filter screen, and the lower surface of the filter middle layer is in contact with the second filter screen.

4. The filtration device based on double-layer filtration according to claim 3, characterized in that: The upper end of the second filter element has an outwardly protruding clamping ring, the lower surface of the clamping ring is in contact with the upper end of the sealing shell, the filter layer is arranged below the clamping ring, the outer edge of the filter layer is provided with a second external thread, and the first external thread used in conjunction with the first internal thread is provided below the second external thread.

5. The filtration device based on double-layer filtration according to claim 4, characterized in that: The inner periphery of the sealing shell has a second internal thread used in conjunction with the second external thread. The first filter element and the second filter element are connected in the sealing shell through threaded cooperation. The sealing shell has an air suction hole, and the position of the air suction hole is higher than the bottom of the filtrate channel. The sealing shell is connected to the hose through the air suction hole.

6. The filtration device based on double-layer filtration according to claim 5, characterized in that: The filtering accuracy of the first filter element is greater than that of the second filter element.

7. The filtration device based on double-layer filtration according to claim 5, characterized in that: The hose includes a first hose and a second hose.

8. The filtration device based on double-layer filtration according to claim 7, characterized in that: The water-blocking filter is a bottle-shaped structure, including a head and a bottle body, the head is provided with an air outlet pipe and an air inlet pipe, the air outlet pipe is connected to the vacuum filtration pump through the first hose, and the air inlet pipe is connected to the filter assembly through the second hose.

9. The filtration device based on double-layer filtration according to claim 8, characterized in that: The air inlet pipe and the air outlet pipe are both right-angle structures.

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