Filtering tank and sample separating and extracting instrument

Abstract

The utility model provides a filtering tank and a sample separation and extraction instrument. The filter tank comprises at least one filter screen and at least one scraper assembly, each filter screen is used for filtering a sample suspension, the at least one scraper assembly and the at least one filter screen are arranged in a one-to-one correspondence manner, each scraper assembly comprises a frame body and a scraper, the scraper is mounted on the frame body and faces the corresponding filter screen, and the scraper assembly is mounted on the frame body. One end, facing the filter screen, of each scraper blade is provided with an acting end, and the projection of each acting end on a plane perpendicular to the thickness direction of the scraper blade is a curve-shaped projection. The sample separation and extraction instrument comprises the filtering tank. According to the application, the shape of the acting end is changed, so that the scraping plate is better attached to the filter screen to be better contacted with the filter screen, and then the scraping plate better scrapes particulate matters in the sample suspension liquid, so that the particulate matters in the sample suspension liquid on the filter screen are crushed and scraped to the periphery, the volume of the particulate matters is reduced, and the particulate matters are uniformly distributed on the filter screen; therefore, filter screen blockage is reduced, and filter efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of filtration technology, and particularly to a filtration tank and a sample separation and extraction instrument. Background Art

[0002] Currently, the extraction of intestinal bacteria needs to be achieved through a filtration device. The sample suspension needs to be filtered in a filtration tank before the intestinal bacteria extract can be obtained. In the prior art, the scraper of the scraper assembly in the filtration tank is a flat scraper. When the filter screen is stressed due to particles on its surface and becomes uneven, the flat scraper cannot fit the filter screen, and thus cannot scrape the particles on the filter screen in the sample suspension well, easily causing the filter screen to be blocked, thereby reducing the efficiency of the filtration tank. Summary of the Utility Model

[0003] The embodiments of this application provide a filtration tank and a sample separation and extraction instrument, which can solve at least some of the above technical problems.

[0004] In a first aspect, this application provides a filtration tank, comprising:

[0005] At least one filter screen for filtering a sample suspension;

[0006] At least one scraper assembly, the at least one scraper assembly is arranged in one-to-one correspondence with the at least one filter screen. Each scraper assembly includes a frame body and a scraper. The scraper is installed on the frame body and faces the corresponding filter screen. One end of each scraper facing the filter screen is provided with an acting end. The projection of each acting end on a plane perpendicular to the thickness direction of the scraper is a curved projection. The scraper assembly reciprocates and translates along the surface of the filter screen to scrape the particles in the sample suspension.

[0007] In a second aspect, this application provides a sample separation and extraction instrument, comprising:

[0008] The above-mentioned filtration tank.

[0009] The present application provides a filter tank and a sample separation and extraction instrument. The filter tank includes at least one filter screen and at least one scraper assembly. Each filter screen is used to filter a sample suspension. The at least one scraper assembly is arranged in one-to-one correspondence with the at least one filter screen. Each scraper assembly includes a frame body and a scraper. The scraper is installed on the frame body and faces the corresponding filter screen. One end of each scraper facing the filter screen is provided with an acting end. The projection of each acting end on a plane perpendicular to the thickness direction of the scraper is a curved projection. The scraper assembly reciprocates and translates along the surface of the filter screen so that the scraper scrapes the particulate matter in the sample suspension. The sample separation and extraction instrument includes the above-mentioned filter tank. The present application changes the shape of the acting end to make the scraper fit the filter screen better and contact the filter screen better, so that the scraper can scrape the particulate matter in the sample suspension better, and can break and scrape the particulate matter in the sample suspension on the filter screen to the surrounding, so that the volume of the particulate matter is reduced and evenly distributed on the filter screen, thereby reducing the blockage of the filter screen and improving the filtration efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0011] Figure 1 It is a schematic block diagram of the sample separation and extraction instrument in the embodiment of the present application.

[0012] Figure 2 It is a schematic structural diagram of the filter tank in the embodiment of the present application.

[0013] Figure 3 is Figure 2 a sectional view at A.

[0014] Figure 4 is Figure 3 a sectional view with some structures removed.

[0015] Figure 5 is Figure 4 an enlarged view at B.

[0016] Figure 6 It is a schematic structural diagram of the fixed frame combined with the scraper assembly in the embodiment of the present application.

[0017] Figure 7 It is a schematic structural diagram of the scraper assembly in the embodiment of the present application.

[0018] Figure 8 This is a schematic structural diagram of the scraper assembly in one direction in an embodiment of the present application.

[0019] Figure 9 It is Figure 8 an enlarged view at C.

[0020] Figure 10 This is a schematic structural diagram of the scraper assembly in another direction in an embodiment of the present application.

[0021] Figure 11 It is Figure 10 an enlarged view at D.

[0022] Figure 12 It is the projection of the scraper in a plane perpendicular to the length direction in one embodiment.

[0023] Figure 13 It is the projection of the scraper in a plane perpendicular to the length direction in another embodiment.

[0024] Figure 14 It is the projection of the scraper in a plane perpendicular to the length direction in still another embodiment.

[0025] Figure 15 It is the projection of the scraper in a plane perpendicular to the length direction in yet another embodiment.

[0026] Figure 16 It is the projection of the scraper in a plane perpendicular to the length direction in another additional embodiment.

[0027] Figure 17 This is a schematic structural diagram of the scraper assembly in another direction in an embodiment of the present application.

[0028] Figure 18 It is Figure 7 an exploded view with the pull rod and the auxiliary rod removed.

[0029] Figure 19 It is Figure 2 a sectional view of the two fixing brackets at A in another direction.

[0030] Figure 20 It is Figure 19 a sectional view of one of the fixing brackets in.

[0031] Reference numerals in the drawings:

[0032] Sample separation and extraction instrument - 100;

[0033] Filter tank - 1;

[0034] Scraper assembly - 11; frame - 111; first end - 1111; second end - 1112; tie rod hole - 1113; scraper - 112; tie rod - 113; thickness direction - 114; length direction - 115; protruding part - 116; first side - 117; second side - 118; first surface - 119; height direction - 120; angle of V-shaped part - 121; auxiliary rod - 122; auxiliary rod hole - 123; sleeve - 124; acting end - 125; straight part - 126; fixing frame - 14; mounting part - 141; first annular part - 142; filtration chamber - 143; through hole - 144; first seal - 145; second annular part - 146; receiving groove - 147; protruding portion - 148; second seal - 149; connecting part - 150; connecting hole - 151; connecting piece - 152; driving plate - 153; fixing plate - 154; fixing seat - 155. Detailed implementation mode

[0035] 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.

[0036] In the description of the embodiments of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the accompanying drawings. The term "connection" in the present application mainly refers to a physical structural connection in the absence of other descriptions, and may also include meanings such as direct connection or indirect connection in the case of descriptions. The terms "first" and "second" in the description and claims of the present application and the accompanying drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the term "comprising" and any variation thereof are intended to cover non-exclusive inclusion.

[0037] Please refer to Figure 1 , Figure 1 , which is a schematic block diagram of the sample separation and extraction instrument 100 in the embodiments of the present application. The sample separation and extraction instrument 100 includes a filtration tank 1.

[0038] Thus, the sample separation and extraction instrument 100 converts the sample into a sample extraction solution, so that the operator can separate and extract the corresponding target substance from the sample extraction solution. The sample separation and extraction instrument 100 needs to filter the sample suspension through the filtration tank 1 during the separation and extraction process to obtain the sample extraction solution.

[0039] The sample separation and extraction instrument 100 includes a stirring tank, a filtration tank 1, and a storage tank arranged in sequence from top to bottom. Among them, the stirring tank is used to contain the sample and the solution. The stirring component in the stirring tank is used to stir the sample and the solution in the stirring tank to form a sample suspension. The sample suspension enters the filtration tank 1 from the stirring tank. The filtration tank 1 is used to filter the sample suspension when the sample suspension enters the filtration tank 1 to obtain a filtered sample extract. The storage tank is used to store the sample extract that has been filtered by the filtration tank 1 to complete the separation and extraction operation of the sample by the sample separation and extraction instrument 100. An operator can extract the corresponding target substance through the sample extract.

[0040] Please refer to Figure 2 and Figure 3 , Figure 2 which is a schematic structural diagram of the filtration tank 1 in the embodiment of the present application. Figure 3 is Figure 2 a sectional view at A. The filtration tank 1 includes at least one filter net (not shown in the figure) and at least one scraper assembly 11. Each filter net is used to filter the sample suspension. The at least one scraper assembly 11 is arranged in one-to-one correspondence with the at least one filter net. Each scraper assembly 11 includes a frame body 111 and a scraper 112. The scraper 112 is installed on the frame body 111 and faces the corresponding filter net.

[0041] Please refer to Figures 6 - 9 , Figure 6 which is a schematic structural diagram of the fixing frame 14 combined with the scraper assembly 11 in the embodiment of the present application. Figure 7 which is a schematic structural diagram of the scraper assembly 11 in the embodiment of the present application. Figure 8 which is a schematic structural diagram of the scraper assembly 11 in one direction in the embodiment of the present application. Figure 9 is Figure 8 an enlarged view at C. One end of each scraper 112 facing the filter net is provided with an acting end 125. The projection of each acting end 125 on a plane perpendicular to the thickness direction 114 of the scraper 112 is a curved projection. The scraper assembly 11 reciprocates and translates along the surface of the filter net to enable the scraper 112 to scrape the particulate matter in the sample suspension.

[0042] Therefore, by changing the shape of the acting end 125 of the scraper 112 from a flat shape to a curved shape, when there are particulate matters on the filter net causing uneven surface stress, the acting end 125 of the scraper 112 in this application can better conform to and contact the filter net, thereby enabling the scraper 112 to better scrape the particulate matters in the sample suspension, being able to break up and scrape the particulate matters in the sample suspension on the filter net to the surroundings, reducing the volume of the particulate matters to be evenly distributed on the filter net, thus reducing the blockage of the filter net, improving the filtration efficiency, and also enhancing the filtration effect of the filter tank 1.

[0043] It can be understood that the material of the filter net can be, but is not limited to, metal, plastic, etc., the shape of the frame body 111 can be rectangular, circular, oval, etc., and the material of the scraper 112 can be, but is not limited to, silica gel, and no limitation is made here.

[0044] Among them, as Figure 2 shown, the thickness direction 114 of the scraper 112 is the movement direction of the reciprocating translation of the scraper assembly 11.

[0045] In some embodiments, please refer to Figure 4 、 Figure 5 and Figure 9 , Figure 4 which is Figure 3 a sectional view with some structures removed, Figure 5 and Figure 4 is an enlarged view at B. The scraper 112 is inserted into the groove of the frame body 111 facing the filter net to connect the frame body 111.

[0046] In some embodiments, as Figure 9 shown, the curved projection is a wavy projection.

[0047] Therefore, the projection of each end of the scraper 112 facing the filter net on a plane perpendicular to the thickness direction 114 of the scraper 112 is set as a wavy projection, that is to say, the shape of the end of the scraper 112 facing the filter net is set as wavy. The wavy scraper 112 can better conform to and contact the filter net, thereby enabling the scraper 112 to better scrape the particulate matters in the sample suspension, being able to break up and scrape the particulate matters in the sample suspension on the filter net to the surroundings, reducing the volume of the particulate matters to be evenly distributed on the filter net, thus reducing the blockage of the filter net, improving the filtration efficiency, and also enhancing the filtration effect of the filter tank 1.

[0048] In some embodiments, as Figure 9 shown, the wavy projection includes multiple arcs with the same radius.

[0049] Thus, the radii of the multiple arcs are the same, enabling the squeegee 112 to conform to the filter screen and have better contact with the filter screen, thereby enabling the squeegee 112 to better scrape the particulate matter in the sample suspension.

[0050] In some embodiments, the wavy projection includes multiple arcs, and at least two of the multiple arcs have different radii.

[0051] Thus, at least two of the multiple arcs have different radii, that is, at least two of the radii of the multiple arcs have different values. When there are particulate matters on the filter screen causing the surface to be uneven under force, the squeegee 112 conforms to the filter screen to better scrape the particulate matter in the sample suspension.

[0052] In some embodiments, the radius of each of the multiple arcs ranges from 270 mm to 452 mm.

[0053] Thus, when the radii of the multiple arcs are within 270 mm to 452 mm, the effect of the squeegee 112 conforming to the filter screen can be achieved.

[0054] In some embodiments, the connections between the multiple arcs form multiple connecting ends, and all of the multiple connecting ends are arranged in a straight line.

[0055] In some embodiments, the connections between the multiple arcs form multiple connecting ends, and some of the multiple connecting ends are arranged in a straight line.

[0056] Please refer to Figure 10 and Figure 11 , Figure 10 which is a schematic structural view of the squeegee assembly 11 in another direction in the embodiments of the present application, Figure 11 and Figure 10 is an enlarged view at D. In some embodiments, the cross-section of the acting end 125 on a plane perpendicular to the length direction 115 of the squeegee 112 includes a protruding portion 116 formed by surrounding at least one straight line.

[0057] Thus, the acting end 125 is provided with the protruding portion 116. The protruding portion 116 enables the acting end 125 to better focus on the filter screen to scrape the particulate matter, and the effect of the squeegee 112 conforming to the filter screen can also be achieved by adjusting the shape of the protruding portion 116.

[0058] In some embodiments, the acting end 125 includes multiple protruding portions 116, and the multiple protruding portions 116 are spaced apart along the length direction 115 of the squeegee.

[0059] As described above, the acting end 125 can be represented as the end of the scraper 112 facing the filter screen, or when the protruding portion 116 is provided on the scraper, it can be represented as the end of the protruding portion 116 facing the filter screen.

[0060] In some embodiments, please refer to Figure 12 and Figure 13 , Figure 12 which is the projection of the scraper 112 in an embodiment on a plane perpendicular to the length direction 115, Figure 13 and which is the projection of the scraper 112 in another embodiment on a plane perpendicular to the length direction 115. The protruding portion 116 extends along the length direction 115 of the scraper 112 and its projection on a plane perpendicular to the thickness direction 114 of the scraper 112 is a wavy projection. The protruding portion 116 includes a first side 117 and a second side 118. The first side 117 is away from the filter screen and the second side 118 is close to the filter screen. Along the direction from the first side 117 to the second side 118, the thickness of the protruding portion 116 remains unchanged.

[0061] Thus, the end of the protruding portion 116 facing the filter screen fits the filter screen better, and the protruding portion 116 can contact the filter screen better, so that the scraper 112 can scrape the particulate matter in the sample suspension better, and then break and scrape the particulate matter in the sample suspension on the filter screen to the surrounding, reducing the volume of the particulate matter to be evenly distributed on the filter screen, thereby reducing the blockage of the filter screen and improving the filtration efficiency.

[0062] Among them, the protruding portion 116 includes a first surface 119 and a second surface. The direction from the first surface 119 to the second surface is the length direction 115 of the scraper 112. The cross-section includes a single-character portion 126, and two single-character portions 126 are provided on opposite sides of the protruding portion 116 and are respectively connected to the protruding portion 116.

[0063] In some embodiments, the first surface 119 and the second surface are polygonal surfaces.

[0064] In some embodiments, one of the first surface 119 and the second surface is a rectangular surface.

[0065] In some embodiments, both the first surface 119 and the second surface are rectangular surfaces.

[0066] In some embodiments, such as Figure 2 and Figure 13As shown, the first surface 119 and the second surface are rectangular surfaces. The height of the portion of the protruding portion 116 that forms a wavy projection is greater than the height of the first surface 119 and the second surface. The projections formed by this portion and the first surface 119 in a plane perpendicular to the length direction 115 of the squeegee 112 together form a rectangular projection. That is, the dashed line in the figure indicates the boundary between the first surface 119 and the portion of the protruding portion 116 that forms a wavy projection.

[0067] In some embodiments, such as Figure 5 , Figure 9 and Figure 11 shown, the protruding portion 116 is a V-shaped portion. The V-shaped portion extends along the length direction 115 of the squeegee 112, and its projection in a plane perpendicular to the thickness direction 114 of the squeegee 112 is a wavy projection. The projection of the V-shaped portion in a plane perpendicular to the length direction 115 of the squeegee 112 is a V-shaped projection. The V-shaped portion includes a first side 117 and a second side 118. The first side 117 is away from the filter net, and the second side 118 is close to the filter net. Along the direction from the first side 117 to the second side 118, the thickness of the V-shaped portion decreases.

[0068] Thus, the thickness of the second side 118 of the V-shaped portion is less than that of the first side 117, so that the surface of the protruding portion 116 facing the filter net can be more concentrated on the surface of the filter net, enabling the squeegee 112 to better contact the filter net, and further enabling the squeegee 112 to better scrape the particulate matter in the sample suspension.

[0069] Please refer to Figure 14 and Figure 15 , Figure 14 which is the projection of the squeegee 112 in a plane perpendicular to the length direction 115 in yet another embodiment. Figure 15 which is the projection of the squeegee 112 in a plane perpendicular to the length direction 115 in yet another embodiment. In some embodiments, such as Figure 2 and Figure 15 shown, the V-shaped portion includes a first surface 119 and a second surface. The direction from the first surface 119 to the second surface is the length direction 115 of the squeegee 112. The first surface 119 and the second surface are trapezoidal surfaces. The height of the portion of the V-shaped portion that forms a wavy projection is greater than the height of the first surface 119 and the second surface. The projections formed by this portion and the first surface 119 in a plane perpendicular to the length direction 115 of the squeegee 112 together form a V-shaped projection. That is, the dashed line in the figure indicates the boundary between the first surface 119 and the portion of the protruding portion 116 that forms a wavy projection.

[0070] In some embodiments, such asFigure 2 and Figure 14 As shown in Figure 14 , the V-shaped part includes a first surface 119 and a second surface. The direction from the first surface 119 to the second surface is the length direction 115 of the squeegee 112, and the first surface 119 and the second surface are V-shaped surfaces.

[0071] Thus, the end of the protruding part 116 facing the filter screen is set to a pointed structure, which can be more concentrated on the surface of the filter screen, so that the squeegee 112 can better contact the filter screen, and further enable the squeegee 112 to better scrape the particulate matter in the sample suspension.

[0072] Please refer to Figure 16 , Figure 16 which is the projection of the squeegee 112 in another embodiment on a plane perpendicular to the length direction 115. In some embodiments, the cross-section further includes a straight part 126, and two straight parts 126 are arranged on opposite sides of the V-shaped part and are respectively connected to the V-shaped part.

[0073] Thus, setting the end of the squeegee 112 facing the filter screen to a V-shaped structure can make the squeegee 112 better contact the filter screen, and further enable the squeegee 112 to better scrape the particulate matter in the sample suspension.

[0074] In some embodiments, the acting end 125 includes a plurality of V-shaped parts, and the V-shaped parts are arranged at intervals along the length direction 115 of the squeegee.

[0075] Thus, setting the end of the squeegee 112 facing the filter screen to a V-shaped structure can make the squeegee 112 better contact the filter screen, and further enable the squeegee 112 to better scrape the particulate matter in the sample suspension.

[0076] In some embodiments, as Figure 11 shown, the angle 121 of the V-shaped part ranges from 60° to 106°.

[0077] In some embodiments, the thickness of the first side 117 of the V-shaped part in the thickness direction 114 of the squeegee 112 ranges from 0.4 mm to 0.7 mm, and the height of the V-shaped part in the height direction 120 of the squeegee 112 ranges from 0.2 mm to 0.4 mm.

[0078] Thus, the angle 121, thickness and height of the V-shaped part are limited to better achieve the effect of the squeegee 112 fitting the filter screen.

[0079] In some embodiments, the cross-section of the acting end 125 in a plane perpendicular to the length direction 115 of the scraper 112 includes a protruding portion 116 formed by surrounding at least one arc. Among them, the settings of the acting end 125 and the protruding portion 116 can refer to the above content.

[0080] In some embodiments, as Figure 2 and Figure 7 shown, the scraper assembly 11 further includes a pull rod 113. The frame 111 includes a first end 1111 and a second end 1112. The first end 1111 and the second end 1112 are provided with pull rod holes 1113. The pull rod 113 passes through the pull rod holes 1113 to connect the frame 111. The pull rod 113 is used to drive the frame 111 to reciprocate and translate along the surface of the filter screen, so as to drive the scraper 112 to reciprocate and translate along the surface of the filter screen.

[0081] Thus, under the action of an external force, the pull rod 113 makes the scraper 112 reciprocate and translate along the surface of the filter screen to scrape the particulate matter on the filter screen, thereby improving the filtration efficiency and the filtration effect of the filter screen.

[0082] Please refer to Figure 17 and Figure 18 , Figure 17 which is a schematic structural diagram of the scraper assembly 11 in another direction in the embodiments of the present application. Figure 18 It is Figure 7 an exploded view after removing the pull rod 113 and the auxiliary rod 122. In some embodiments, a notch is provided at a position corresponding to the pull rod hole 1113 at one end of the scraper 112 close to the frame 111, so that the pull rod 113 passes through the pull rod holes 1113 at the first end 1111 and the second end 1112.

[0083] In some embodiments, as Figure 18 shown, a sleeve 124 is provided at a position between the pull rod hole 1113 at the first end 1111 and the pull rod hole 1113 at the second end 1112 of the frame 111 to connect the pull rod hole 1113 at the first end 1111 and the pull rod hole 1113 at the second end 1112, so that a part of the pull rod 113 is located inside the sleeve 124.

[0084] In some embodiments, the scraper assembly 11 further includes at least one auxiliary rod 122 arranged in parallel with the pull rod 113. The frame 111 is provided with an auxiliary rod hole 123. The auxiliary rod 122 passes through the auxiliary rod hole 123 to connect the frame 111. This setting can ensure the smoothness of the reciprocating motion of the scraper assembly 11.

[0085] Please refer to Figure 19 and Figure 20, Figure 19 is Figure 2 a sectional view of the two fixing brackets 14 at A in another direction, Figure 20 is Figure 19 a sectional view of one of the fixing brackets 14 in. In some embodiments, as Figure 6 , Figure 19 and Figure 20 shown, the filter tank 1 further includes at least one fixing bracket 14. Each fixing bracket 14 includes a mounting portion 141 and a first annular portion 142. The mounting portion 141 is used for mounting the filter net. The mounting portion 141 is in a hollow shape. The first annular portion 142 is connected around the periphery of the mounting portion 141. And the first annular portion 142 and the mounting portion 141 together enclose a filtering cavity 143. Each filtering cavity 143 is used for mounting a filter net. Each scraper assembly 11 is correspondingly mounted in one of the filtering cavities 143.

[0086] Thus, the filter net is mounted in the fixing bracket 14 to fix the filter net and make the filtering process of the filter tank 1 more stable.

[0087] It can be understood that the shape of the fixing bracket 14 can be rectangular, circular, elliptical, etc., which is not limited here.

[0088] In some embodiments, as Figure 19 and Figure 20 shown, a through hole 144 is provided on one side of the first annular portion 142. The pull rod 113 passes through the through hole 144. The filter tank 1 further includes a first sealing member 145. The first sealing member 145 is inserted into the through hole 144 and sleeved on the outer periphery of the pull rod 113.

[0089] As described above, specifically, the pull rod 113 passes through the through hole 144 so that at least a part of the pull rod 113 is located outside the filtering cavity 143. The first sealing member 145 is fixed in the through hole 144 and sleeved on the outer periphery of the pull rod 113. This setting can seal the gap between the pull rod 113 and the through hole 144 and prevent the sample suspension from leaking out.

[0090] Specifically, one end of the first sealing member 145 abuts against one side of the first annular portion 142 close to the filtering cavity 143, and the other end of the first sealing member 145 abuts against one side of the first annular portion 142 away from the filtering cavity 143, so that the first sealing member 145 better fills the gap between the pull rod 113 and the through hole 144 to achieve a better sealing effect.

[0091] In some embodiments, the first seal 145 is made of an elastic material such as rubber, so that the first seal 145 has elasticity.

[0092] In some embodiments, as Figure 2 and Figure 3 shown, the plurality of fixing frames 14 are sequentially stacked along the filtration direction. Each of the plurality of fixing frames 14 includes a second annular portion 146. The second annular portion 146 is circumferentially connected to one side of the first annular portion 142 away from the filtration chamber 143 and extends in the opposite direction of the filtration direction. The second annular portion 146 of each of the plurality of fixing frames 14 is sleeved on the outer periphery of the first annular portion 142 of the adjacent fixing frame 14.

[0093] Wherein, the filtration direction refers to the flow direction of the sample suspension during the filtration process, that is, the height direction 120 of the scraper 112 described in Figure 2 , and the sample suspension can be a fecal suspension. The fecal suspension is filtered to obtain an intestinal bacteria extract.

[0094] In some embodiments, at a position where the first annular portion 142 of each of the plurality of fixing frames 14 is connected to the second annular portion 146 and close to the filtration chamber 143, a receiving groove 147 recessed in the filtration direction is provided. A protruding portion 148 protruding in the filtration direction is provided on the bottom surface of the first annular portion 142 away from the second annular portion 146. The protruding portion 148 of each fixing frame 14 is installed in the receiving groove 147 of the adjacent fixing frame 14 to stabilize the connection between the plurality of fixing frames 14.

[0095] In some embodiments, the filtration tank 1 further includes a second seal 149. The second seal 149 is installed in the receiving groove 147 of each fixing frame 14. When installing the plurality of fixing frames 14, the second seal 149 is pressed by the protruding portion 148. This setting can prevent the second seal 149 from falling off, so as to ensure that the second seal 149 can continuously seal.

[0096] Wherein, both the receiving groove 147 and the protruding portion 148 extend along the shape of the first annular portion 142. Therefore, the receiving groove 147 and the protruding portion 148 are also annular, so as to achieve sealing in the circumferential direction of the first annular portion 142.

[0097] In some embodiments, the second seal 149 is made of an elastic material such as rubber, so that the second seal 149 has elasticity.

[0098] As described above, when the plurality of fixing brackets 14 are installed as a whole, the through hole 144 penetrates through the first annular portion 142 and also passes through the second annular portion 146 outside the first annular portion 142.

[0099] In some embodiments, as Figure 6 and Figure 20 shown, the mounting portion 141 is provided with at least one fixing seat 155. The position of the fixing seat 155 corresponds to the end position of the auxiliary rod 122. The fixing seat 155 is used to place the auxiliary rod 122, and the fixing seat 155 can improve the stability of the auxiliary rod 122 during the movement of the scraping component 11.

[0100] In some embodiments, the plurality of filter meshes are sequentially installed in the corresponding filter cavities 143 along the filtering direction. Along the filtering direction, the density of the filtering holes on the filter meshes gradually increases. This design can gradually improve the filtering accuracy, make the purity of the sample extract obtained after filtering higher and higher, thereby improving the quality of the filtered filtrate and also enhancing the filtering effect of the filter tank 1.

[0101] It can be understood that the shape of the filtering holes can be but is not limited to being circular, rectangular, elliptical, etc., and is not limited herein.

[0102] In some embodiments, as Figure 2 , Figure 3 and Figure 19 shown, each of the plurality of fixing brackets 14 further includes a connecting portion 150. The connecting portion 150 is disposed on the outer sidewall of the second annular portion 146. The connecting portion 150 is provided with a connecting hole 151. The filter tank 1 further includes a connecting member 152. The connecting member 152 passes through the connecting hole 151 to connect the plurality of fixing brackets 14.

[0103] Specifically, the connecting holes 151 at the same position along the filtering direction are communicated with each other, and the connecting member 152 is simultaneously inserted through all the connecting holes 151, so that all the fixing brackets 14 are connected as a whole and will not move relative to each other.

[0104] In some embodiments, a plurality of connecting portions 150 can be provided on each fixing bracket 14. The plurality of connecting portions 150 are arranged at intervals along the circumferential direction of the second annular portion 146. Correspondingly, the filter tank 1 includes a plurality of connecting members 152. Each connecting member 152 passes through the corresponding connecting hole 151, making the connection between all the fixing brackets 14 more firm.

[0105] In some embodiments, the filter tank 1 further includes a driving plate 153, which is installed outside the fixing frame 14, and the driving plate 153 is connected to the pull rod 113 of the scraping assembly 11. The driving plate 153 is used to drive the scraping assembly 11 to move through the pull rod 113, that is, the pull rods 113 of the at least one scraping assembly 11 all extend to the outside of the filtering cavity 143 and are all connected to the driving plate 153. Therefore, when the driving plate 153 pulls or pushes the pull rod 113 along the movement direction of the scraping assembly 11, the scraping assembly 11 can be driven to reciprocate and translate on the surface of the filter net.

[0106] In some embodiments, the filter tank 1 further includes a fixing plate 154, which is installed between the driving plate 153 and the second annular part 146 of the fixing frame 14, and the pull rod 113 passes through the driving plate 153 and the fixing plate 154.

[0107] In some embodiments, the multiple scraping assemblies 11 are arranged in the spaced filtering cavities 143 corresponding to the multiple filter nets along the filtering direction. Among them, the number of the fixing frames 14 is more than the number of the filter nets.

[0108] The above description is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application; without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A filter tank, characterized in that, Comprising: At least one filter screen for filtering the sample suspension; At least one scraper assembly, the at least one scraper assembly being arranged in one-to-one correspondence with the at least one filter screen, each scraper assembly including a frame body and a scraper, the scraper being mounted on the frame body and facing the corresponding filter screen, each scraper having an acting end at one end facing the filter screen, and the projection of each acting end on a plane perpendicular to the thickness direction of the scraper being a curved projection, and the scraper assembly reciprocally translating along the surface of the filter screen so that the scraper scrapes the particulate matter in the sample suspension.

2. The filter tank according to claim 1, wherein The curved projection is a wavy projection.

3. The filter tank according to claim 2, wherein The wavy projection includes multiple arcs with the same radius.

4. The filter tank according to claim 2, wherein, The wavy projection includes multiple arcs, and at least two of the multiple arcs have different radii.

5. The filter tank according to claim 3 or 4, characterized in that, The radius of each arc in the multiple arcs ranges from 270 mm to 452 mm.

6. The filter tank according to claim 3 or 4, characterized in that, The cross-section of the acting end on a plane perpendicular to the length direction of the scraper includes a protruding portion formed by surrounding at least one straight line.

7. The filter tank according to claim 6, wherein The protruding portion extends along the length direction of the scraper and its projection on a plane perpendicular to the thickness direction of the scraper is a wavy projection. The protruding portion includes a first side and a second side, the first side being away from the filter screen and the second side being close to the filter screen, and along the direction from the first side to the second side, the thickness of the protruding portion remains unchanged.

8. The filter tank according to claim 6, characterized in that, The protruding portion is a V-shaped portion. The V-shaped portion extends along the length direction of the scraper and its projection on a plane perpendicular to the thickness direction of the scraper is a wavy projection. The projection of the V-shaped portion on a plane perpendicular to the length direction of the scraper is a V-shaped projection. The V-shaped portion includes a first side and a second side, the first side being away from the filter screen and the second side being close to the filter screen, and along the direction from the first side to the second side, the thickness of the V-shaped portion decreases.

9. The filter tank according to claim 8, characterized in that, The cross-section further includes a straight portion, and two straight portions are arranged on opposite sides of the V-shaped portion and are respectively connected to the V-shaped portion.

10. The filter tank according to claim 9, characterized in that, Along the length direction of the scraper, the V-shaped portions are arranged at intervals.

11. The filter tank according to any one of claims 8-10, characterized in that, The angle range of the V-shaped portion is 60° - 106°.

12. The filter tank according to claim 11, wherein, The thickness range of the first side of the V-shaped portion in the thickness direction of the scraper is 0.4 mm - 0.7 mm, and the height range of the V-shaped portion in the height direction of the scraper is 0.2 mm - 0.4 mm.

13. The filter tank according to claim 1, characterized in that, The scraper assembly further includes a pull rod. The frame body includes a first end and a second end, and pull rod holes are provided at the first end and the second end. The pull rod passes through the pull rod holes to connect the frame body, and the pull rod is used to drive the frame body to reciprocally translate along the surface of the filter screen so as to drive the scraper to reciprocally translate along the surface of the filter screen.

14. The filter tank according to claim 1, characterized in that, The filter tank further includes at least one fixing frame, and each of the at least one fixing frame includes a mounting portion and a first annular portion. The mounting portion is used for mounting the filter screen, and the mounting portion is in a hollow shape. The first annular portion is circumferentially connected to the periphery of the mounting portion, and the first annular portion and the mounting portion together enclose a filtering cavity. Each of the one or more filter screens is respectively mounted in the corresponding filtering cavity, and at least a part of each of the one or more scraper assemblies is located in the corresponding filtering cavity.

15. A sample separation and extraction instrument, characterized in that, Comprising: The filter tank according to any one of claims 1-14.

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