Filter device

Abstract

The present application provides a filtering device, which includes: a sampling tank having a first chamber for accommodating a sample, the sampling tank being used for diluting the sample in the first chamber to form a sample suspension; a filtering tank including a fixing frame, a filtering net and a scraping blade assembly, the fixing frame having a filtering chamber that can communicate with the first chamber, the filtering net and the scraping blade assembly are both received in the filtering chamber, the filtering net is carried on the fixing frame and is used for filtering the sample suspension, the scraping blade assembly is disposed opposite to the filtering net, and the scraping blade assembly can reciprocally translate along the surface of the filtering net to scrape impurities in the sample suspension; and a storage tank connected to one end of the filtering tank away from the sampling tank, the storage tank having a second chamber communicating with the filtering chamber, and the second chamber is used for accommodating the extract obtained by filtering the sample suspension through the filtering tank. The filtering device provided by the present application can improve the filtering efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of filtration, and particularly relates to a filtration device. Background Art

[0002] Fecal microbiota transplantation (FMT) is a means of transplanting functional flora in the feces of healthy humans into the gastrointestinal tract of patients to help patients reconstruct normal-functioning intestinal flora for treating diseases inside and outside the intestine. The extraction of intestinal bacteria in feces needs to be achieved through a filtration device. The filtration device usually includes a sampling tank, a filtration tank, and a storage tank. Feces are first diluted into a fecal suspension in the sampling tank, and then filtered and purified through the filtration tank to obtain an extract, which is finally collected in the storage tank. In related technologies, a rotatable stirrer is provided in the filtration tank. The rotating shaft of the stirrer can drive the stirring paddle to rotate, and the stirring paddle is used to stir the fecal suspension to achieve filtration while stirring. However, the stirrer will reduce the filtration efficiency. Summary of the Invention

[0003] The present application provides a filtration device, which can improve the filtration efficiency.

[0004] The filtration device includes:

[0005] A sampling tank having a first chamber for accommodating a sample, and the sampling tank is used for diluting the sample in the first chamber and forming a sample suspension;

[0006] A filtration tank including a fixing frame, a filter net, and a scraping blade assembly. The fixing frame has a filtration chamber that can communicate with the first chamber. The filter net and the scraping blade assembly are both received in the filtration chamber. The filter net is carried on the fixing frame and is used for filtering the sample suspension. The scraping blade assembly is disposed opposite to the filter net, and the scraping blade assembly can reciprocally translate along the surface of the filter net to scrape impurities in the sample suspension; and

[0007] A storage tank connected to one end of the filtration tank away from the sampling tank. The storage tank has a second chamber communicating with the filtration chamber, and the second chamber is used for accommodating the extract obtained by filtering the sample suspension through the filtration tank.

[0008] Wherein, the sampling tank includes a cover body and a tank body. The tank body is connected to the filtration tank. The cover body covers one end of the tank body away from the filtration tank and is detachably connected to the tank body. The cover body and the tank body together form the first chamber.

[0009] Wherein, the sampling can also includes a stirring assembly, which includes a stirring shaft and a stirring blade. The stirring shaft is rotatably connected to the cover body and is at least partially located in the first chamber. The stirring blade is connected to the portion of the stirring shaft located in the first chamber and can rotate with the stirring shaft.

[0010] Among them, the tank body includes a circumferential portion and a bottom plate portion, the circumferential portion is connected to the cover body, the bottom plate portion is bent and connected to one end of the circumferential portion away from the cover body, the bottom plate portion has an outlet, and the outlet is used to connect the first chamber and the filter chamber. The sampling tank also includes a sealing assembly, and the sealing assembly can block the outlet to separate the first chamber and the filter chamber, or make the outlet conductive to connect the first chamber and the filter chamber.

[0011] Among them, the sealing assembly includes a sealing cover, a transmission rod and a pressure rod, the pressure rod is movably connected to the cover body, the transmission rod is rotatably connected to the tank body, the sealing cover includes a sealing part and a rod body part that are connected, and the sealing part is directly opposite to the outlet; the pressure rod can control the rotation of the transmission rod, and the transmission rod further controls the movement of the sealing part relative to the bottom plate part through the rod body part, so that the sealing part is attached to the bottom plate part or spaced from the bottom plate part.

[0012] There are multiple fixing frames, filter screens and scraper blade assemblies, and multiple fixing frames are stacked along the filtering direction. Different filter screens and different scraper blade assemblies are arranged in different filter cavities along the filtering direction, and the filtering direction is the direction from the sampling tank to the storage tank.

[0013] Wherein, the filter screen and the scraper assembly are arranged in the filter chambers spaced apart from each other along the filtering direction.

[0014] Wherein, the filter tank also includes a driving plate, which is arranged on the outside of the filter tank and connected to all the scraper assemblies. The driving plate can translate relative to the fixing frame to drive the scraper assemblies to scrape.

[0015] Wherein, the sampling tank and the filtering tank are detachably connected, and / or the storage tank and the filtering tank are detachably connected.

[0016] Wherein, the storage tank has a negative pressure interface, the negative pressure interface is connected to the second chamber, and the negative pressure interface is used to connect a negative pressure device.

[0017] In the present application, the wiper assembly can perform a reciprocating translational motion within the filtration chamber. The reciprocating translational motion can drive impurities to move sufficiently in the sample suspension, and can further break up large impurities. Moreover, compared with the related art, the reciprocating translational motion does not generate continuous vortices, and thus does not cause the situation where impurities accumulate at the same position for a long time. Therefore, the filtration form in the present application can make the impurities form a more uniform diffusion effect, thereby having a higher filtration efficiency, not causing waste of the sample, and also not generating jamming problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 Schematic diagram of a filtration device provided by an embodiment of the present application.

[0020] Figure 2 is Figure 1 A cross-sectional view of the filtration device shown along line A-A.

[0021] Figure 3 Schematic diagram of a partial structure of a filtration tank provided by an embodiment of the present application.

[0022] Figure 4 is Figure 3 A cross-sectional view of the structure shown along line B-B.

[0023] Figure 5 Schematic diagram of a sampling tank provided by an embodiment of the present application.

[0024] Figure 6 Schematic diagram of a sampling tank provided by another embodiment of the present application.

[0025] Figure 7 Schematic diagram of a sampling tank provided by yet another embodiment of the present application.

[0026] Figure 8 is Figure 6 A partial enlarged view of the sampling tank shown in the C area.

[0027] Figure 9 Schematic diagram of a filtration tank provided by an embodiment of the present application.

[0028] Figure 10 Schematic diagram of a partial structure of a filtration tank provided by another embodiment of the present application.

[0029] Figure 11Schematic diagram of a fixing bracket provided by an embodiment of the present application.

[0030] Figure 12 Schematic diagram of the cooperation of two fixing brackets provided by an embodiment of the present application.

[0031] Figure 13 For Figure 12 Partial enlarged view of the structure shown in area D.

[0032] Figure 14 Schematic diagram of a wiper blade assembly provided by an embodiment of the present application.

[0033] Figure 15 For Figure 4 Partial enlarged view of the structure shown in area E.

[0034] Figure 16 For Figure 4 Partial enlarged view of the structure shown in area F.

[0035] Figure 17 Schematic diagram of a filter tank provided by another embodiment of the present application.

[0036] Figure 18 Schematic diagram of a storage tank provided by an embodiment of the present application.

[0037] Figure 19 Schematic diagram of a filtering device provided by another embodiment of the present application. Detailed implementation manners

[0038] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0039] Referring to "embodiment" or "embodiment manner" herein means that the specific features, structures or characteristics described in conjunction with the embodiment or embodiment manner may be included in at least one embodiment of the present application. The appearance of this phrase in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

[0040] Please refer to Figure 1 And Figure 2, this application provides a filtering device 1, which can be used but not limited to extracting intestinal bacteria from feces. This application only takes the extraction of intestinal bacteria from feces as an example for illustration. The filtering device 1 includes a sampling tank 10, a filtering tank 20 and a storage tank 30, which will be introduced in detail below with reference to the drawings.

[0041] Please refer to Figure 1 and Figure 2 , the sampling tank 10 has a first chamber S1 for accommodating the sample, and the sampling tank 10 is used to dilute the sample in the first chamber S1 and form a sample suspension.

[0042] Please refer to Figures 2 to 4 , the filtering tank 20 includes a fixing frame 210, a filter net 220 and a scraping component 230. The fixing frame 210 has a filtering chamber K1 that can communicate with the first chamber S1. Both the filter net 220 and the scraping component 230 are housed in the filtering chamber K1. The filter net 220 is carried on the fixing frame 210 and is used to filter the sample suspension. The scraping component 230 is disposed opposite to the filter net 220. The scraping component 230 can reciprocally translate along the surface of the filter net 220 to scrape the impurities in the sample suspension. In Figure 3 and Figure 4 , the direction shown by the dotted arrow is the moving direction of the scraping component 230.

[0043] Please refer to Figure 1 and Figure 2 , the storage tank 30 is connected to one end of the filtering tank 20 away from the sampling tank 10. The storage tank 30 has a second chamber T1 that communicates with the filtering chamber K1. The second chamber T1 is used to accommodate the extract obtained by filtering the sample suspension through the filtering tank 20. The material of the storage tank 30 can be but not limited to polycarbonate (PC). The color of the storage tank 30 can be but not limited to colorless and transparent.

[0044] Specifically, the sampling tank 10 is used to hold samples, the filtering tank 20 is used to filter the sample suspension, and the storage tank 30 is used to collect the filtered extract. During the process of using the filtering device 1, the filtering tank 20 is arranged between the sampling tank 10 and the storage tank 30, with the sampling tank 10 above and the storage tank 30 below. The direction from the sampling tank 10 to the storage tank 30 is the filtering direction, and the sample suspension flows and is filtered along the filtering direction. Among them, the sample is feces, the sample suspension is the fecal suspension, and the extract obtained after filtering the fecal suspension is the intestinal bacteria extract. The sample suspension enters the filtering chamber K1 of the filtering tank 20 through the first chamber S1 of the sampling tank 10 and is then filtered by the filter net 220. During the filtering process, the scraping component 230 will make a reciprocating translational movement along the surface of the filter net 220, and the impurities with larger sizes in the sample suspension will be scraped by the scraping component 230, making the impurities as evenly distributed as possible, thereby improving the filtering efficiency. The sample suspension is filtered by the filter net 220 to obtain the extract, and the extract is finally collected in the second chamber T1 of the storage tank 30.

[0045] The shape of the fixing frame 210 can be approximately rectangular, circular, oval, etc. The material of the fixing frame 210 can be, but is not limited to, polycarbonate (PC). The color of the fixing frame 210 can be, but is not limited to, colorless and transparent. The material of the filter net 220 can be, but is not limited to, metal, plastic, etc.

[0046] In the related art, to enhance the filtering effect, a stirrer is provided in the filtering tank 20. The stirrer is arranged at the middle position of the filtering chamber K1, and the rotating shaft of the stirrer can drive the stirring paddle to rotate, and the stirring paddle stirs the sample suspension by rotating. However, during the rotation of the stirrer, since a vortex will be formed near the rotating shaft, the impurities in the sample suspension will gather at the vortex, resulting in the inability of the impurities to spread sufficiently and effectively, making the impurities at this position easily block the filter net 220, unable to filter effectively, thus causing waste of samples and low filtering efficiency; if too much accumulates, it may also jam the stirrer and affect the rotation.

[0047] In the present application, the scraping component 230 can make a reciprocating translational movement in the filtering chamber K1. The reciprocating translational movement can drive the impurities to move fully in the sample suspension and can further break up the large impurities. Moreover, compared with the related art, the reciprocating translational movement will not generate a continuous vortex, so the situation of impurities gathering at the same position for a long time will not occur. Therefore, the filtering form in the present application can make the impurities form a more uniform diffusion effect, thereby having a higher filtering efficiency, not causing waste of samples, and not generating jamming problems.

[0048] Please refer to Figure 5, the sampling tank 10 includes a cover 110 and a tank body 120. The tank body 120 is connected to the filtration tank 20. The cover 110 covers one end of the tank body 120 away from the filtration tank 20 and is detachably connected to the tank body 120. The cover 110 and the tank body 120 together form the first chamber S1. It should be noted that the detachable connection form between the cover 110 and the tank body 120 can be, but is not limited to, sliding connection, rotational connection, snap connection, threaded connection, etc. Before collecting the sample, the cover 110 is removed from the tank body 120. After the sample is loaded into the tank body 120, the cover 110 is then closed on the tank body 120. The cover 110 and the tank body 120 can be made of transparent materials, such as polycarbonate (PC). Transparency facilitates the operator to observe the internal situation of the sampling tank 10 at any time. The general shape of the sampling tank 10 can be, but is not limited to, frustum-shaped, prism-shaped, cylindrical, etc. In this application, only the frustum shape is used for exemplary illustration.

[0049] Please refer to Figure 6 , the sampling tank 10 further includes a liquid inlet pipe 150, and the liquid inlet pipe 150 is inserted into the cover 110. The liquid inlet pipe 150 has a liquid inlet channel S2, and the liquid inlet channel S2 penetrates through the liquid inlet pipe 150 and communicates with the first chamber S1. The liquid inlet channel S2 is used to guide the diluent into the first chamber S1 to dilute the sample.

[0050] Please refer to Figure 6 , the sampling tank 10 further includes a stirring assembly 130, and the stirring assembly 130 includes a stirring shaft 131 and stirring blades 132. The stirring shaft 131 is rotatably connected to the cover 110 and at least partially located in the first chamber S1. The stirring blades 132 are connected to the part of the stirring shaft 131 located in the first chamber S1 and can rotate following the stirring shaft 131. The stirring blades 132 are used to stir the sample so that the sample is fully mixed with the diluent to form a sample suspension. The number of the stirring blades 132 can be one or more (such as 2, 3, etc.). When the number is multiple, the multiple stirring blades are arranged at intervals along the axis direction of the stirring shaft 131, so that stirring can be realized at different heights. After the diluent is injected into the first chamber S1 through the liquid inlet channel S2, the stirring shaft 131 can start to drive the stirring blades 132 to rotate and stir. Optionally, after the stirring shaft 131 drives the stirring blades 132 to rotate clockwise for a certain time, it then rotates counterclockwise for a certain time to stir fully.

[0051] Please refer to Figure 7The tank body 120 includes a peripheral portion 121 and a bottom plate portion 122. The peripheral portion 121 is connected to the cover body 110. The bottom plate portion 122 is bent and connected to one end of the peripheral portion 121 away from the cover body 110. The bottom plate portion 122 has an outlet S3. The outlet S3 is used to connect the first chamber S1 and the filter chamber K1, that is, the outlet S3 passes through the bottom plate portion 122.

[0052] The annular portion 121 is the side wall of the sampling tank 10, and the bottom plate portion 122 is the bottom wall of the sampling tank 10. Optionally, along the filtering direction, the radial dimension of the annular portion 121 gradually decreases, which is conducive to the sample suspension in the sampling tank 10 entering the filter tank 20 by gravity. Optionally, the bottom plate portion 122 is recessed toward the outlet S3, that is, the bottom plate portion 122 is inclined, and the closer the position on the bottom plate portion 122 is to the outlet S3, the smaller the distance to the storage tank 30 is, which can ensure that the sample suspension in the sampling tank 10 fully flows into the filter tank 20.

[0053] Please refer to Figure 7 The sampling tank 10 further includes a sealing assembly 140, which can block the outlet S3 to isolate the first chamber S1 and the filter chamber K1, or connect the outlet S3 to connect the first chamber S1 and the filter chamber K1. Before the sample is fully stirred, the sealing assembly 140 is in a state of blocking the outlet S3 to prevent the sample that is not fully stirred from entering the filter tank 20. After the sample is fully stirred, the first opening is opened, and the sample suspension enters the filter tank 20 through the outlet S3.

[0054] The sealing assembly 140 is described in detail below with reference to the accompanying drawings.

[0055] Please refer to Figure 6 and Figure 7 , the sealing assembly 140 includes a sealing cover 143, a transmission rod 142 and a pressure rod 141. The pressure rod 141 is movably connected to the cover body 110. The transmission rod 142 is rotatably connected to the tank body 120. The sealing cover 143 includes a sealing portion 1432 and a rod body 1431 connected to each other. The sealing portion 1432 is directly opposite to the outlet S3. The pressure rod 141 can control the rotation of the transmission rod 142, and the transmission rod 142 further controls the movement of the sealing portion 1432 relative to the bottom plate portion 122 through the rod body 1431, so that the sealing portion 1432 is attached to the bottom plate portion 122 or spaced from the bottom plate portion 122.

[0056] Specifically, the pressure rod 141 is carried by the cover body 110 and penetrates the cover body 110, and the pressure rod 141 is at least partially exposed to the outside world, so that the movement of the sealing cover 143 can be controlled by the pressure rod 141 from the outside world. The transmission rod 142 is arranged in the first chamber S1, and the pressure rod 141 can move up and down relative to the cover body 110, and the positive projection of the pressure rod 141 on the transmission rod 142 at least partially falls within the range of the transmission rod 142, so that the pressure rod 141 abuts against the transmission rod 142 during the downward process, so that the transmission rod 142 rotates. The transmission rod 142 has a connecting end D3 and a movable end D4, wherein the connecting end D3 is rotatably connected to the can body 120, and the movable end D4 is directly opposite to the rod body 1431 of the sealing cover 143. When the transmission rod 142 rotates toward the filter tank 20, its movable end D4 can abut against the rod body 1431, so that the sealing portion 1432 of the sealing cover 143 moves relative to the bottom plate 122. Optionally, the transmission rod 142 has a limiting groove S4, which is located between the connecting end D3 and the movable end D4 and is arranged opposite to the pressure rod 141. When the pressure rod 141 abuts against the transmission rod 142, the pressure rod 141 is located in the limiting groove S4, so that the pressure rod 141 can be prevented from slipping off the transmission rod 142. The tank body 120 may also include a carrier portion 123, the periphery of which is connected to the bottom plate 122 and is arranged in the outlet S3, and the carrier portion 123 is used to carry the sealing cover 143. Optionally, the carrier portion 123 is cross-shaped. The sealing portion 1432 is disposed on a side of the carrier portion 123 away from the cover body 110, the rod portion 1431 penetrates the carrier portion 123, and the radial dimension of the sealing portion 1432 is greater than the aperture of the outlet S3. The sealing assembly 140 may further include an elastic member 144 having elasticity, the elastic member 144 is sleeved on the outer periphery of the rod portion 1431, and one end of the elastic member 144 close to the transmission rod 142 is fixedly connected to the rod portion 1431, and one end of the elastic member 144 away from the transmission rod 142 abuts against the carrier portion 123.

[0057] When the pressure rod 141 abuts against the transmission rod 142 and rotates toward the filter tank 20, the movable end D4 of the transmission rod 142 abuts against the rod body 1431 and moves toward the filter tank 20, and the elastic member 144 is shortened (the elastic member 144 is in a compressed state), and the sealing portion 1432 is spaced away from the bottom plate 122. At this time, the first chamber S1 is connected to the filter chamber K1 through the outlet S3, and the sample suspension can enter the filter tank 20 from the sampling tank 10 through the outlet S3. When the pressure rod 141 moves in the direction away from the filter tank 20, the elastic member 144 automatically extends under the elastic action and drives the sealing portion 1432 to move in the direction close to the cover body 110 through the rod body 1431 until the sealing portion 1432 abuts against the bottom plate 122. At this time, the first chamber S1 and the filter chamber K1 are separated, and the sample suspension cannot flow into the filter tank 20.

[0058] It should be noted that when the sealing portion 1432 abuts against the bottom plate portion 122, the elastic member 144 can be in a compressed state or in a natural state (the elastic member 144 is not compressed). Among them, the elastic member 144 can be, but is not limited to, an elastic spring.

[0059] Optionally, please refer to Figure 8 , the sampling tank 10 further includes a sealing ring 160. The sealing ring 160 is fixed to the side of the bottom plate portion 122 facing away from the cover body 110, and the sealing member surrounds the outlet S3. When the sealing portion 1432 abuts against the bottom plate portion 122, the sealing ring 160 is located between the sealing portion 1432 and the bottom plate portion 122 and abuts against the sealing portion 1432. Optionally, the sealing ring 160 has elasticity. When the sealing portion 1432 abuts against the bottom plate portion 122, the sealing ring 160 elastically abuts against the sealing portion 1432.

[0060] The following will introduce the filter tank 20 provided in the above embodiments in detail with reference to the drawings.

[0061] Please refer to Figure 9 and Figure 10 , the number of the fixing frames 210, the filter nets 220 and the scraping blade assemblies 230 is multiple. The multiple fixing frames 210 are stacked along the filtering direction. Different filter nets 220 and different scraping blade assemblies 230 are respectively arranged in different filtering cavities K1 along the filtering direction. Among them, the filtering direction is the direction from the sampling tank 10 to the storage tank 30.

[0062] Specifically, the number of the fixing frames 210, the filter nets 220 and the scraping blade assemblies 230 is multiple, and they are arranged in sequence along the filtering direction. Each fixing frame 210 has a filtering cavity K1. The filter net 220 and the scraping blade assembly 230 are arranged in the filtering cavity K1, and one filtering cavity K1 only accommodates one filter net 220 and one scraping blade assembly 230. Therefore, during the filtering process of the sample suspension, it will undergo multi-level filtering, which can improve the filtering accuracy.

[0063] It should be noted that the number of the filter nets 220 is equal to that of the scraping blade assemblies 230, and the number of the fixing frames 210 is greater than or equal to the number of the filter nets 220, that is, the number of the fixing frames 210 and the filter nets 220 can be the same or different. The number of the fixing frames 210 can be, but is not limited to, 2, 3, 6, 8, 9, etc. The number of the filter nets 220 can be, but is not limited to, 2, 4, 5, 7, 9, etc.

[0064] Optionally, along the filtering direction, the density of the filtering holes on the filter net 220 gradually increases. With such a setting, the filtering accuracy can be gradually improved, and the purity of the intestinal bacteria extract obtained after filtering is also higher and higher. Among them, the shape of the filtering holes can be, but is not limited to, circular, rectangular, oval, etc.

[0065] Please refer to Figure 2 and Figure 10 , the filter net 220 and the blade assembly 230 are arranged in the spaced-apart filter chambers K1 along the filtering direction. That is to say, the number of the fixing frames 210 is more than the number of the filter nets 220, and the filter net 220 and the blade assembly 230 are arranged only in the filter chamber K1 of the (N - 1)th fixing frame 210 and the filter chamber K1 of the (N + 1)th fixing frame 210, while the filter chamber K1 of the Nth fixing frame 210 is not provided with the filter net 220 and the blade assembly 230. Among them, the Nth filter chamber K1 is used to provide space for the (N + 1)th filter chamber K1, so that the blade assembly 230 in the (N + 1)th filter chamber K1 can move smoothly. Taking the reverse explanation that the filter net 220 and the blade assembly 230 are also arranged in the Nth filter chamber K1, in some cases, more impurities may accumulate in the Nth filter chamber K1. Due to the limited space of the Nth filter chamber K1, the impurities may hinder the movement of the blade assembly 230, the movement of the blade assembly 230 is not smooth, the impurities cannot be effectively diffused, and then the filter net 220 is blocked, ultimately resulting in a slowdown in the filtering speed from the (N - 1)th filter chamber K1 to the Nth filter chamber K1 and a slowdown in the filtering speed from the Nth filter chamber K1 to the (N + 1)th filter chamber K1. In this embodiment, the filter chamber K1 of the Nth fixing frame 210 is not provided with the filter net 220 and the blade assembly 230. Therefore, the Nth filter chamber K1 can provide space for the (N + 1)th filter chamber K1. Even if more impurities accumulate in the (N + 1)th filter chamber K1, these impurities can diffuse into the Nth filter chamber K1, so as not to hinder the movement of the blade assembly 230, and thus ensure continuous and efficient filtering efficiency.

[0066] Please refer to Figure 11 , the fixing frame 210 includes a bearing part 211 and a first annular part 212. The bearing part 211 is in a hollow shape and is used to bear the filter net 220. The first annular part 212 is connected around the periphery of the bearing part 211 and together with the bearing part 211 encloses the filter chamber K1. Among them, the filter net 220 is laid on the hollow-shaped bearing part 211. The so-called hollow shape means that there are holes on the bearing part 211, and these holes penetrate the bearing part 211 and the penetration direction is parallel to the filtering direction. With such a setting, both the structural strength of the bearing part 211 can be ensured and the filtering function can be realized. Among them, the first annular part 212 is a closed annular structure, which extends along the edge of the bearing part 211 and is connected to the bearing part 211.

[0067] It should be noted that the filter screen 220 can be fixed on the bearing part 211 in, but not limited to, forms such as connectors (screws, bolts, etc.) and glue.

[0068] Optionally, first fix the filter screen 220 on the bearing part 211 through a connector, and then apply glue to bond the filter screen 220 to the bearing part 211. It can be understood that the connector can only fix one point, and at positions far from the connector, the filter screen 220 and the bearing part 211 are separated. Therefore, on this basis, using glue can make the filter screen 220 adhere to the bearing part 211 at all positions, thus ensuring the flatness of the filter screen. In addition, debris may be generated during the process of inserting the connector into the bearing part 211, and this debris may not be completely removed and may contaminate the sample suspension. After using glue, these debris can be permanently bonded to the bearing part 211 and cannot fall off, thus avoiding the problem of contamination.

[0069] Please refer to Figure 11 and Figure 12 As shown in, the bearing part 211 further includes a second annular part 213, and the shape of the second annular part 213 is substantially the same as that of the first annular part 212, and it is also a closed annular structure. The second annular part 213 is connected around the side of the first annular part 212 facing away from the filter cavity K1, and protrudes from the first annular part 212 in the opposite direction of the filtering direction. That is to say, the inner side wall of the second annular part 213 is connected to the outer side wall of the first annular part 212, and the second annular part 213 is located at the end of the first annular part 212 far from the bearing part 211. Therefore, the inner ring diameter of the second annular part 213 is greater than or equal to the outer ring diameter of the first annular part 212. Further, the second annular part 213 of the Nth fixing frame 210 is sleeved on the outer periphery of the first annular part 212 of the (N - 1)th fixing frame 210, where N is a positive integer greater than or equal to 2. In other words, along the filtering direction, the second annular part 213 of the next fixing frame 210 is sleeved outside the first annular part 212 of the previous fixing frame 210.

[0070] Please refer to Figure 13, the filter tank 20 further includes a first seal 240. The first seal 240 is disposed between the first annular portion 212 of the Nth fixing frame 210 and the first annular portion 212 of the (N - 1)th fixing frame 210. That is to say, the first seal 240 is disposed between the first annular portions 212 on adjacent fixing frames 210, and the opposite sides of the first seal 240 are respectively in abutting relation with the adjacent first annular portions 212, so as to seal the gap between the adjacent first annular portions 212 to prevent the sample suspension from leaking during the filtering process. The first seal 240 is in a closed ring shape, so that a sealing effect can be achieved in the circumferential direction. That is to say, the first seal 240 in the closed ring shape can seal the peripheries (circumferences) of the adjacent fixing frames 210, thereby completely avoiding the leakage of the sample suspension.

[0071] Please refer to Figure 13 , the first annular portion 212 has a top surface M1 and a bottom surface M2 which are oppositely arranged. The direction in which the top surface M1 points to the bottom surface M2 is the same as the filtering direction. A receiving groove K2 which is recessed from the top surface M1 in the filtering direction is provided on the first annular portion 212. A protruding portion 2121 which protrudes from the bottom surface M2 in the filtering direction is further provided on the first annular portion 212. The protruding portion 2121 of the (N - 1)th fixing frame 210 is disposed in the receiving groove K2 of the Nth fixing frame 210. In other words, along the filtering direction, the protruding portion 2121 of the previous fixing frame 210 is disposed in the receiving groove K2 of the next fixing frame 210. The first seal 240 is located between the protruding portion 2121 and the bottom wall of the receiving groove K2. That is to say, the first seal 240 is disposed in the receiving groove K2 and is pressed by the protruding portion 2121. With such a setting, the first seal 240 can be prevented from falling off, thereby ensuring that the first seal 240 can continuously seal.

[0072] Optionally, both the receiving groove K2 and the protruding portion 2121 extend along the shape of the first annular portion 212. Therefore, the receiving groove K2 and the protruding portion 2121 are also annular, so that a sealing effect can be formed in the circumferential direction of the first annular portion 212.

[0073] Optionally, the first seal 240 has elasticity and elastically abuts against the protruding portion 2121, so that the gap can be better filled and the sealing effect can be better.

[0074] Please refer to Figure 9 and Figure 11, the fixing frame 210 further includes a connecting portion 214 protruding from the outer sidewall of the second annular portion 213. The filter tank 20 further includes a connecting member 270 passing through the connecting portions 214 on all the fixing frames 210. That is to say, through holes are provided on the connecting portion 214 of each fixing frame 210, and the through holes communicate with each other. The connecting member 270 passes through all the through holes at the same time, so that all the fixing frames 210 are connected as a whole and will not move relative to each other. Multiple connecting portions 214 can be provided on each fixing frame 210, and the multiple connecting portions 214 are arranged at intervals along the circumferential direction of the second annular portion 213. Correspondingly, the number of the connecting members 270 is also multiple, and each connecting member 270 passes through the corresponding connecting portion 214, so that all the fixing frames 210 can be connected more firmly.

[0075] Please refer to Figure 14 and Figure 15 , the scraping blade assembly 230 includes a frame body 231, a scraping blade 232, and a pull rod 233. The scraping blade 232 is carried on the frame body 231 and faces the filter net 220. The pull rod 233 is connected to the frame body 231 and penetrates through the fixing frame 210 to extend outside the fixing frame 210. The pull rod 233 is used to drive the frame body 231 to move.

[0076] Among them, the general shape of the frame body 231 can be rectangular, circular, oval, etc., and its material can be but not limited to polymethyl methacrylate (PMMA). The scraping blade 232 is strip-shaped, fixed on the frame body 231, and the scraping blade 232 is closer to the filter net 220 than the frame body 231. The material of the scraping blade 232 can be but not limited to silica gel. The length direction of the scraping blade 232 is perpendicular to or substantially perpendicular to the movement direction of the scraping blade assembly 230. The scraping blade 232 can drive the impurities to move sufficiently in the suspension, so that the impurities are evenly distributed. At least part of the pull rod 233 is arranged in the filter cavity K1, at least part of it passes through the fixing frame 210 and is arranged outside the fixing frame 210. It is connected to the frame body 231 and can drive the frame body 231 to reciprocate horizontally under the drive of an external force.

[0077] It should be noted that the scraping blade 232 and the filter net 220 can be in contact or arranged at intervals.

[0078] Optionally, the shape of the filter cavity K1 is rectangular, and the shape of the frame body 231 is rectangular. It can be understood that since the movement form of the scraping blade assembly 230 is reciprocating translation, the movement path of the rectangular frame body 231 can well cover the rectangular filter cavity K1, so as to drive the impurities to move sufficiently in the suspension, make the impurities evenly distributed, and then ensure a high filtration efficiency.

[0079] Please refer to Figure 16 , the fixing bracket 210 has a through hole K3, and the through hole K3 penetrates through one side of the fixing bracket 210. The pull rod 233 passes through the through hole K3. The filter tank 20 further includes a second seal 250, and the second seal 250 is disposed in the through hole K3 and sleeved on the outer periphery of the pull rod 233. Wherein, the through hole K3 penetrates through the first annular portion 212 and the second annular portion 213 sleeved on the outer periphery of the first annular portion 212. The through hole K3 is used for the pull rod 233 to pass through, so that at least a part of the pull rod 233 is disposed outside the fixing bracket 210. The second seal 250 is fixed in the through hole K3 and sleeved on the pull rod 233, so as to seal the gap between the pull rod 233 and the fixing bracket 210 and prevent the sample suspension from leaking out.

[0080] Optionally, the second seal 250 includes an inner seal section 251, an intermediate seal section 252, and an outer seal section 253 that are connected in sequence. Wherein, the outer diameters of the inner seal section 251 and the outer seal section 253 are greater than the diameter of the through hole K3, and the inner seal section 251 is tightly abutted against the inner side surface of the first annular portion 212, and the outer seal section 253 is tightly abutted against the outer side surface of the first annular portion 212, and the intermediate seal section 252 is disposed in the through hole K3.

[0081] Optionally, the second seal 250 is elastic, the inner seal section 251 elastically abuts against the inner side surface of the first annular portion 212, and the outer seal section 253 elastically abuts against the outer side surface of the first annular portion 212, so as to better fill the gap and make the sealing effect better.

[0082] Please refer to Figure 9 , the filter tank 20 further includes a driving plate 260, the driving plate 260 is disposed outside the filter tank 20 and is connected to all the blade assemblies 230. The driving plate 260 can translate relative to the fixing bracket 210 to drive the blade assemblies 230 to scrape. The pull rods 233 of all the blade assemblies 230 extend outside the fixing bracket 210 and are all connected to the driving plate 260. When the driving plate 260 reciprocates (that is, the driving plate 260 moves away from or close to the fixing bracket 210, as shown by the dotted arrow in Figure 9 ), all the blade assemblies 230 will reciprocate in the current filter, so as to improve the driving efficiency and there is no need to drive each blade assembly 230 separately.

[0083] Please refer to Figure 9 and Figure 14, the blade assembly 230 further includes at least one auxiliary rod 234 arranged parallel to the pull rod 233. The auxiliary rod 234 is connected to the frame 231, and the auxiliary rods 234 all pass through the fixed frame 210 and are connected to the driving plate 260. It can be understood that, with such an arrangement, the smoothness of the reciprocating movement of the blade assembly 230 can be ensured.

[0084] Please refer to Figure 17 , the filter tank 20 has a first end D1 and a second end D2 that are far away from each other. The direction from the first end D1 towards the second end D2 is the filtering direction. The filter tank 20 further includes a first connection frame 280, the first connection frame 280 is arranged at the first end D1 of the filter tank 20, and the second annular part 213 of the fixed frame 210 is sleeved on the outer periphery of the first connection frame 280. The filter tank 20 further includes a second connection frame 290, the second connection frame 290 is arranged at the second end D2 of the filter tank 20, and the second connection frame 290 is sleeved on the outer periphery of the first annular part 212 of the fixed frame 210. It should be noted that the shapes of the first connection frame 280 and the second connection frame 290 may be the same as or different from the shape of the fixed frame 210.

[0085] Optionally, the sampling tank 10 and the filter tank 20 are detachably connected. Optionally, the first connection frame 280 and the sampling tank 10 are detachably connected. The detachable connection may but is not limited to using a connecting member 270 (such as a bolt, a screw, etc.), a sliding connection, a rotational connection, a snap connection, a threaded connection, etc.

[0086] Optionally, the storage tank 30 and the filter tank 20 are detachably connected. Optionally, the second connection frame 290 and the storage tank 30 are detachably connected. The detachable connection may but is not limited to using a connecting member 270 (such as a bolt, a screw, etc.), a sliding connection, a rotational connection, a snap connection, a threaded connection, etc.

[0087] It can be understood that the detachable connection can make the filtering device 1 more convenient for processing and production, subsequent maintenance or replacement, and also convenient for sample collection and filtration.

[0088] Please refer to Figure 18 , the storage tank 30 has a negative pressure interface T2, the negative pressure interface T2 communicates with the second chamber T1, and the negative pressure interface T2 is used to connect a negative pressure device. This negative pressure device is used to create a negative pressure in the second chamber T1 during the filtering process, so that the filtering speed of the sample suspension along the filtering direction can be increased, and the filtering efficiency can be improved.

[0089] Optionally, please refer to Figure 19, the height H1 of the filtering device 1 ranges from 350 mm to 450 mm. The maximum width H2 of the filtering device 1 ranges from 230 mm to 290 mm. The height H3 of the sampling tank 10 ranges from 100 mm to 200 mm. The width H4 of the sampling tank 10 ranges from 150 mm to 200 mm.

[0090] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application, and these improvements and refinements are also considered to be within the protection scope of the present application.

Claims

1. A filtering device, characterized in that, The filtering device comprises: A sampling canister having a first chamber for accommodating a sample, wherein the sampling canister is used to dilute the sample in the first chamber and form a sample suspension; A filter tank, comprising a fixing frame, a filter screen and a scraper assembly, wherein the fixing frame has a filter cavity which can communicate with the first chamber, the filter screen and the scraper assembly are both accommodated in the filter cavity, the filter screen is carried by the fixing frame and is used to filter the sample suspension, the scraper assembly is arranged opposite to the filter screen, and the scraper assembly can reciprocate along the surface of the filter screen to scrape impurities in the sample suspension; and A storage tank connected to one end of the filter tank away from the sampling tank, the storage tank having a second chamber connected to the filter chamber, the second chamber being used to contain the extract obtained by filtering the sample suspension through the filter tank; There are multiple fixing frames, filter screens and scraper assemblies, and multiple fixing frames are stacked along the filtering direction. Different filter screens and different scraper assemblies are arranged in different filtering chambers along the filtering direction, wherein the filtering direction is the direction from the sampling tank to the storage tank; The filter tank further comprises a driving plate, which is arranged on the outside of the filter tank and connected to all the scraper assemblies, and the driving plate can translate relative to the fixing frame to drive the scraper assemblies to scrape; Wherein, the scraper assembly includes a frame, a scraper and a pull rod, the scraper is carried by the frame and faces the filter screen, the fixed frame has a through hole, the pull rod is connected to the frame, the pull rod extends from the through hole to the outside of the fixed frame, and both are connected to the drive plate, the pull rod is used to drive the frame to move in its extension direction, the filter tank also includes a second sealing member, the second sealing member is arranged in the through hole and sleeved on the outer periphery of the pull rod, the second sealing member includes an inner sealing section, an intermediate sealing section, and an outer sealing section connected in sequence, the intermediate sealing section is passed through the through hole, the outer diameters of the inner sealing section and the outer sealing section are larger than the diameter of the through hole, and the inner sealing section is tightly abutted against the inner side surface of the fixed frame, and the outer sealing section is tightly abutted against the outer side surface of the fixed frame; The scraper assembly further comprises at least one auxiliary rod arranged in parallel with the pull rod, the auxiliary rod is connected to the frame body, and the auxiliary rods all pass through the fixing frame and are connected to the driving plate; The sampling canister includes a cover body and a canister body, the canister body includes a peripheral portion and a bottom plate portion, the peripheral portion is connected to the cover body, the bottom plate portion is bent and connected to one end of the peripheral portion away from the cover body, the bottom plate portion has an outlet, the outlet is used to connect the first chamber and the filter chamber, the sampling canister also includes a sealing component, the sealing component can block the outlet to isolate the first chamber and the filter chamber, or make the outlet conductive to connect the first chamber and the filter chamber; The sealing assembly includes a sealing cover, a transmission rod, and a pressing rod. The pressing rod is movably connected to the cover body, and the transmission rod is rotatably connected to the tank body. The sealing cover includes a connected sealing portion and a rod body portion, and the sealing portion faces the outlet. The pressing rod can control the rotation of the transmission rod, and the transmission rod then controls the movement of the sealing portion relative to the bottom plate portion through the rod body portion, so that the sealing portion adheres to the bottom plate portion or is spaced from the bottom plate portion. The tank body further includes a carrier portion. The periphery of the carrier portion is connected to the bottom plate portion and is disposed inside the outlet. The carrier portion is used to carry the sealing cover. The sealing portion is disposed on the side of the carrier portion away from the cover body, and the rod body portion penetrates through the carrier portion. The sealing assembly further includes an elastic member. The elastic member is sleeved on the outer periphery of the rod body portion, and one end of the elastic member close to the transmission rod is fixedly connected to the rod body portion, and the end of the elastic member away from the transmission rod abuts against the carrier portion.

2. The filtering device according to claim 1, characterized in that, The tank body is connected to the filter tank. The cover body covers one end of the tank body away from the filter tank and is detachably connected to the tank body. The cover body and the tank body together form the first chamber.

3. The filtering device according to claim 2, characterized in that, The sampling tank further includes a stirring assembly. The stirring assembly includes a stirring shaft and stirring blades. The stirring shaft is rotatably connected to the cover body and at least partially located in the first chamber. The stirring blades are connected to the portion of the stirring shaft located in the first chamber and can rotate following the stirring shaft.

4. The filtering device according to claim 1, characterized in that, The filter screen and the scraping blade assembly are disposed in the spaced filter chambers along the filtering direction.

5. The filtering device according to any one of claims 1-4, characterized in that, The sampling tank and the filter tank are detachably connected, and / or the storage tank and the filter tank are detachably connected.

6. The filtering device according to any one of claims 1-4, characterized in that, The storage tank has a negative pressure interface. The negative pressure interface communicates with the second chamber, and the negative pressure interface is used to connect a negative pressure device.

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