Sample solution filter disc self-pressing structure

Abstract

The application relates to the technical field of solution filtration, in particular to a sample solution filter disc self-pressing structure which comprises an upper filter shell and a lower filter shell, a filter membrane is arranged between the upper filter shell and the lower filter shell, a first cavity is arranged at the bottom end of the upper filter shell, a second cavity is arranged at the top end of the lower filter shell, an upper groove is arranged in the first cavity, a lower groove is arranged in the second cavity, the upper groove and the lower groove are arranged in a symmetrical mode, the filter membrane is arranged between the upper groove and the lower groove, an upper clamping layer space is arranged in the upper filter shell, a lower clamping layer space is arranged in the lower filter shell, one end of the upper filter shell is fixedly connected with an upper liquid inlet, the other end of the upper filter shell is fixedly connected with an upper liquid outlet, one end of the lower filter shell is fixedly connected with a lower liquid outlet, the upper liquid outlet and the lower liquid outlet are arranged in a corresponding mode, the upper clamping layer space and the upper groove are communicated with the upper liquid inlet, the upper groove is communicated with the upper liquid outlet, the lower clamping layer space is communicated with the upper liquid inlet, and the lower groove is communicated with the lower liquid outlet. The sample solution filter disc self-pressing structure can realize the self-pressing of the filter membrane.

Description

Technical Field

[0001] This invention relates to the field of solution filtration technology, and in particular to a self-pressurizing structure for a sample solution filter tray.

[0002] Background technology includes

[0003] In the process of extracting gut microbiota, the sample solution is pressurized and then filtered through a disposable filter. However, when using a small-channel laminar flow microfiltration filter, the upper and lower outer shells of the filter must press the filter membrane together for it to function properly.

[0004] To further improve efficiency, it is necessary to continuously increase the filtration pressure or enlarge the filter membrane size, resulting in increasing pressure on the outer casing. When the outer casing deforms under stress, the small flow channels detach from the filter membrane, and the sample solution no longer flows along the channels. To prevent excessive deformation of the outer casing, which would prevent the upper and lower casings from reliably pressing the membrane together, the only solution is to thicken the filter casing or use an external mechanical clamping device. Summary of the Invention

[0005] The purpose of this invention is to provide a self-pressurizing structure for a sample solution filter tray to solve the above-mentioned problems and achieve the purpose of self-pressurizing the filter membrane without increasing the thickness of the filter shell.

[0006] To achieve the above objectives, the present invention provides the following solution:

[0007] A self-pressurizing structure for a sample solution filter disc includes an upper filter shell and a lower filter shell, with a filter membrane disposed between the upper and lower filter shells. A first cavity is formed at the bottom of the upper filter shell, and a second cavity is formed at the top of the lower filter shell. An upper groove is formed within the first cavity, and a lower groove is formed within the second cavity. The upper and lower grooves are symmetrically arranged vertically. The filter membrane is located between the upper and lower grooves. An upper interlayer space is formed inside the upper filter shell, and a lower interlayer space is formed inside the lower filter shell. An upper inlet is fixedly connected to one end of the upper filter shell, and an upper outlet is fixedly connected to the other end. A lower outlet is fixedly connected to one end of the lower filter shell. The upper and lower outlets are vertically corresponding. The upper interlayer space and the upper groove are both connected to the upper inlet. The upper groove is connected to the upper outlet. The lower interlayer space is connected to the upper inlet, and the lower groove is connected to the lower outlet.

[0008] Preferably, the upper filter housing includes an upper substrate, the first cavity is formed on the bottom surface of the upper substrate, the top surface of the upper substrate has a first groove, an upper cover is fixedly connected to the opening of the first groove, and the upper interlayer space is located between the bottom surface of the upper cover and the bottom wall of the first groove.

[0009] Preferably, the lower filter housing includes a lower substrate, the second cavity is formed on the top surface of the lower substrate, the bottom surface of the lower substrate has a second groove, a lower cover is fixedly connected to the opening of the second groove, and the lower interlayer space is located between the top surface of the lower cover and the top wall of the second groove.

[0010] Preferably, the upper liquid inlet is fixed to one end of the upper substrate and communicates with the upper groove. The upper groove has a first upper through hole at one end near the upper liquid inlet. The first upper through hole is corresponding to the outlet of the upper liquid inlet. The first upper through hole communicates with an upper channel. The upper channel is opened in the upper substrate and communicates with the upper interlayer space. An upper one-way valve is provided in the upper channel.

[0011] Preferably, the bottom surface of the upper substrate has a through hole that communicates with the upper liquid inlet, and the top surface of the lower substrate has a lower channel that corresponds to and communicates with the through hole. The lower channel communicates with the lower interlayer space, and a lower one-way valve is provided in the lower channel.

[0012] Preferably, the top wall of the first cavity is fixed with a plurality of upper groove shoulders, the upper groove shoulders abut against the top surface of the filter membrane, the plurality of upper groove shoulders form at least one upper groove, the starting end of the upper groove is connected to the upper liquid inlet, the end of the upper groove is connected to a second upper through hole, the second upper through hole is opened in the upper substrate, and the second upper through hole is connected to the upper liquid outlet.

[0013] Preferably, the bottom wall of the second cavity is fixed with a plurality of lower groove shoulders, the lower groove shoulders are arranged symmetrically above and below the upper groove shoulders, the lower groove shoulders abut against the bottom surface of the filter membrane, the plurality of lower groove shoulders form at least one lower groove, the end of the lower groove is connected to a lower through hole, the lower through hole is opened in the lower substrate, and the lower through hole is connected to the lower liquid outlet.

[0014] Preferably, the bottom surface of the upper substrate has an upper step, which surrounds the outer edge of the first cavity and is flush with the bottom end of the upper groove shoulder. The top surface of the lower substrate has a lower step, which surrounds the outer edge of the second cavity and is flush with the top surface of the lower groove shoulder. The upper step and the lower step are arranged vertically in correspondence, and the outer edge of the filter membrane is located between the upper step and the lower step.

[0015] This invention offers the following technical advantages: In use, the upper and lower filter shells are joined by welding or bonding. Because the upper and lower interlayer spaces form an isobaric space internally, the upper and lower interlayers compress the filter membrane, preventing sample solution cross-contamination. This self-pressurizing filter is unaffected by pressure changes or size variations; it achieves self-pressurization under different pressures and dimensions. The invention has a simple structure, requiring no additional thickness or mechanical clamping devices, resulting in a lightweight and thin design. Furthermore, this invention has a wide range of applications, achieving self-pressurization of the filter membrane without increasing the thickness of the filter shell. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the CC cross-section of the present invention;

[0019] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0020] Figure 4 for Figure 2 A magnified view of a section at point B in the middle;

[0021] Figure 5 This is a top view of the filter housing of the present invention;

[0022] Figure 6 This is a top view of the lower filter housing of the present invention;

[0023] Figure 7 This is a diagram of the filtering process of the present invention.

[0024] The components are as follows: 1. Upper filter housing; 2. Lower filter housing; 3. Filter membrane; 11. Upper substrate; 12. Upper cover; 13. Upper interlayer space; 21. Lower substrate; 22. Lower cover; 23. Lower interlayer space; 111. Upper inlet; 112. Upper outlet; 113. Upper groove shoulder; 114. Upper groove; 115. First upper through hole; 116. Second upper through hole; 117. Upper channel; 118. Through hole; 119. Upper step; 120. Upper step surface; 121. Upper one-way valve; 211. Lower outlet; 212. Lower groove shoulder; 213. Lower groove; 214. Lower through hole; 215. Lower channel; 216. Lower step; 217. Lower step surface; 218. Lower one-way valve. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] Reference Figure 1-7 This invention provides a self-pressurizing structure for a sample solution filter tray, comprising an upper filter shell 1 and a lower filter shell 2, with a filter membrane 3 disposed between the upper filter shell 1 and the lower filter shell 2. A first cavity is formed at the bottom of the upper filter shell 1, and a second cavity is formed at the top of the lower filter shell 2. An upper groove 114 is provided in the first cavity, and a lower groove 213 is provided in the second cavity. The upper groove 114 and the lower groove 213 are symmetrically arranged vertically. The filter membrane 3 is located between the upper groove 114 and the lower groove 213. An upper interlayer space 13 is formed inside the upper filter shell 1, and the lower filter... The shell 2 has a lower interlayer space 23 inside. One end of the upper filter shell 1 is fixedly connected to an upper liquid inlet 111, and the other end of the upper filter shell 1 is fixedly connected to an upper liquid outlet 112. One end of the lower filter shell 2 is fixedly connected to a lower liquid outlet 211. The upper liquid outlet 112 and the lower liquid outlet 211 are arranged vertically and vertically respectively. The upper interlayer space 13 and the upper groove 114 are both connected to the upper liquid inlet 111. The upper groove 114 is connected to the upper liquid outlet 112. The lower interlayer space 23 is connected to the upper liquid inlet 111. The lower groove 213 is connected to the lower liquid outlet 211.

[0028] When the upper filter shell 1 and the lower filter shell 2 are joined by welding or bonding, the upper interlayer space 13 and the lower interlayer space 23 have no outlet, thus forming an isobaric space with a preset internal pressure of P2. When the sample solution enters the upper inlet 111 at pressure P, if P < P2, the sample solution enters the upper groove 114 and then flows out through the upper outlet 112 at atmospheric pressure P1. The filtered material enters the lower groove 213 through the filter membrane 3 and flows out through the lower outlet 211. The pressure P3 gradually decreases along the flow direction, with P1 < P3 < P < P2. If P > P2, the sample solution enters the upper interlayer space 13, the lower interlayer space 23, and the upper groove 114, respectively. The pressures at these three locations are basically the same as the pressure at the upper inlet 111, which is P. P1 < P3 < P = P2, which still satisfies P2*S2 > P3*S3. The upper interlayer space 13 and the lower interlayer space 23 press the filter membrane 3 together through the upper groove 114 and the lower groove 213 to prevent the sample solution from flowing out.

[0029] Further optimization of the scheme: the upper filter shell 1 includes an upper substrate 11, a first cavity is formed on the bottom surface of the upper substrate 11, a first groove is formed on the top surface of the upper substrate 11, an upper cover 12 is fixedly connected to the groove opening of the first groove, and the upper interlayer space 13 is located between the bottom surface of the upper cover 12 and the bottom wall of the first groove.

[0030] In a further optimized design, the lower filter housing 2 includes a lower substrate 21, a second cavity is formed on the top surface of the lower substrate 21, a second groove is formed on the bottom surface of the lower substrate 21, a lower cover 22 is fixedly connected to the opening of the second groove, and the lower interlayer space 23 is located between the top surface of the lower cover 22 and the top wall of the second groove.

[0031] The upper interlayer space 13 and the lower interlayer space 23 are symmetrically arranged. When the upper filter shell 1 and the lower filter shell 2 are combined by welding or bonding, the upper interlayer space 13 and the lower interlayer space 23 press the filter membrane 3 tightly through the upper groove 114 and the lower groove 213. Since the upper interlayer space 13 and the lower interlayer space 23 have no outlet, an isobaric space can be formed inside. The internal pressure is preset to P2 to prevent sample solution from flowing outwards.

[0032] In a further optimized design, the upper liquid inlet 111 is fixed to one end of the upper substrate 11 and communicates with the upper groove 114. The upper groove 114 is provided with a first upper through hole 115 at one end near the upper liquid inlet 111. The first upper through hole 115 is correspondingly provided with the outlet of the upper liquid inlet 111. The first upper through hole 115 is connected to an upper channel 117. The upper channel 117 is opened in the upper substrate 11 and communicates with the upper interlayer space 13. An upper one-way valve 121 is provided in the upper channel 117.

[0033] In a further optimized design, a through hole 118 is provided on the bottom surface of the upper substrate 11, which is connected to the upper liquid inlet 111. A lower channel 215 is provided on the top surface of the lower substrate 21, which is vertically and vertically corresponding to and connected to the through hole 118. The lower channel 215 is connected to the lower interlayer space 23, and a lower one-way valve 218 is provided in the lower channel 215.

[0034] When the sample solution enters the upper inlet 111 at pressure P, if P < P2, the upper one-way valve 121 and the lower one-way valve 218 are closed, and the sample solution enters the upper groove 114, then flows out through the upper outlet 112 at atmospheric pressure P1. The filtered material enters the second cavity through the filter membrane 3 and flows out through the lower outlet 211. The pressure P3 in the upper groove 114 gradually decreases along the flow direction, P1 < P3 < P < P2; if P > P2, the upper one-way valve 121 and the lower one-way valve 218 are open, and the sample solution enters the upper interlayer space 13, the lower interlayer space 23, and the upper groove 114 through the upper channel 117, the lower channel 215, and the first upper through-hole 115, respectively. The pressure at these three locations is basically the same as the pressure at the upper inlet 111, which is P. P1 < P3 < P = P2, which still satisfies P2*S2 > P3*S3. The upper interlayer space 13 and the lower interlayer space 23 press the filter membrane 3 together through the upper groove 114 and the lower groove 213 to prevent the sample solution from flowing out.

[0035] In a further optimized design, a plurality of upper groove shoulders 113 are fixed to the top wall of the first cavity. The upper groove shoulders 113 abut against the top surface of the filter membrane 3. The plurality of upper groove shoulders 113 form at least one upper groove 114. The starting end of the upper groove 114 is connected to the upper liquid inlet 111, and the end of the upper groove 114 is connected to a second upper through hole 116. The second upper through hole 116 is opened in the upper substrate 11 and is connected to the upper liquid outlet 112.

[0036] In a further optimized design, the bottom wall of the second cavity is fixed with several lower groove shoulders 212. The lower groove shoulders 212 and the upper groove shoulders 113 are symmetrically arranged vertically. The lower groove shoulders 212 abut against the bottom surface of the filter membrane 3. The several lower groove shoulders 212 form at least one lower groove 213. The end of the lower groove 213 is connected to a lower through hole 214. The lower through hole 214 is opened in the lower substrate 21 and is connected to the lower liquid outlet 211.

[0037] The sample solution enters the upper groove 114, which is fixed to the first cavity, through the first upper through hole 115, and then flows out from the upper outlet 112 through the second upper through hole 116; the filtered material enters the lower groove 213 through the filter membrane 3, and then flows out from the lower outlet 211 through the lower through hole 214, thus completing the filtration.

[0038] In a further optimized design, an upper step 119 is provided on the bottom surface of the upper substrate 11, which surrounds the outer edge of the first cavity. The upper step 119 is flush with the bottom end of the upper groove shoulder 113. A lower step 216 is provided on the top surface of the lower substrate 21, which surrounds the outer edge of the second cavity. The top end of the lower groove shoulder 212 is flush with the top surface of the lower step 216. The upper step 119 and the lower step 216 are arranged vertically and vertically, and the outer edge of the filter membrane 3 is located between the upper step 119 and the lower step 216.

[0039] When the upper filter shell 1 and the lower filter shell 2 are joined by welding or bonding, the upper step surface 120 and the lower step surface 217 are tightly joined together, the outer edge of the filter membrane 3 is located between the upper step 119 and the lower step 216, and the upper groove shoulder 113 and the lower groove shoulder 212 initially press the filter membrane 3 together.

[0040] The working process of the present invention is as follows: When the upper filter shell 1 and the lower filter shell 2 are combined by welding or bonding, the upper step surface 120 and the lower step surface 217 are tightly combined. The outer edge of the filter membrane 3 is located between the upper step 119 and the lower step 216. The upper groove shoulder 113 and the lower groove shoulder 212 initially press the filter membrane 3. Since the upper interlayer space 13 and the lower interlayer space 23 have no outlet, an isobaric space can be formed inside. The internal pressure is preset to P2.

[0041] When the sample solution enters the upper inlet 111 at pressure P, if P < P2, the upper one-way valve 121 and the lower one-way valve 218 are closed. The sample solution enters the upper groove 114, which is fixed to the first cavity, through the first upper through-hole 115, and then flows out from the upper outlet 112 at normal pressure P1 through the second upper through-hole 116. The filtered material enters the lower groove 213 through the filter membrane 3, and then flows out from the lower outlet 211 through the lower through-hole 214, completing the filtration. The pressure P3 in the upper groove 114 gradually decreases along the flow direction, P1 < P3 < P < P2.

[0042] If P > P2, the upper one-way valve 121 and the lower one-way valve 218 are open, and the sample solution enters the upper interlayer space 13, the lower interlayer space 23, and the upper groove 114 through the upper channel 117, the lower channel 215, and the first upper through-hole 115, respectively. The pressure at these three locations is basically the same as the pressure at the upper inlet 111, which is P. P1 < P3 < P = P2, and P2*S2 > P3*S3 is still satisfied. The upper interlayer space 13 and the lower interlayer space 23 press the filter membrane 3 together through the upper groove shoulder 113 and the lower groove shoulder 212 to prevent the sample solution from flowing out.

[0043] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0044] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A self-pressurizing structure for a sample solution filter tray, characterized in that... The filter includes an upper filter shell (1) and a lower filter shell (2). A filter membrane (3) is disposed between the upper filter shell (1) and the lower filter shell (2). A first cavity is formed at the bottom of the upper filter shell (1), and a second cavity is formed at the top of the lower filter shell (2). An upper groove (114) is provided in the first cavity, and a lower groove (213) is provided in the second cavity. The upper groove (114) and the lower groove (213) are arranged symmetrically. The filter membrane (3) is located between the upper groove (114) and the lower groove (213). An upper interlayer space (13) is formed inside the upper filter shell (1), and a lower interlayer space (2) is formed inside the lower filter shell (2). 23), one end of the upper filter shell (1) is fixedly connected to an upper liquid inlet (111), the other end of the upper filter shell (1) is fixedly connected to an upper liquid outlet (112), one end of the lower filter shell (2) is fixedly connected to a lower liquid outlet (211), the upper liquid outlet (112) and the lower liquid outlet (211) are arranged vertically correspondingly, the upper interlayer space (13) and the upper groove (114) are both connected to the upper liquid inlet (111), the upper groove (114) is connected to the upper liquid outlet (112), the lower interlayer space (23) is connected to the upper liquid inlet (111), and the lower groove (213) is connected to the lower liquid outlet (211); The upper filter shell (1) includes an upper substrate (11), the first cavity is formed on the bottom surface of the upper substrate (11), the top surface of the upper substrate (11) is provided with a first groove, the opening of the first groove is fixedly connected to an upper cover (12), and the upper interlayer space (13) is located between the bottom surface of the upper cover (12) and the bottom wall of the first groove. The lower filter housing (2) includes a lower substrate (21), the second cavity is opened on the top surface of the lower substrate (21), the bottom surface of the lower substrate (21) is provided with a second groove, a lower cover (22) is fixedly connected to the groove opening of the second groove, and the lower interlayer space (23) is located between the top surface of the lower cover (22) and the top wall of the second groove. The upper liquid inlet (111) is fixed to one end of the upper substrate (11) and communicates with the upper groove (114). The upper groove (114) has a first upper through hole (115) at one end near the upper liquid inlet (111). The first upper through hole (115) is correspondingly provided with the outlet of the upper liquid inlet (111). The first upper through hole (115) is connected to an upper channel (117). The upper channel (117) is opened in the upper substrate (11) and communicates with the upper interlayer space (13). An upper one-way valve (121) is provided in the upper channel (117). The bottom surface of the upper substrate (11) is provided with a through hole (118), which is connected to the upper liquid inlet (111). The top surface of the lower substrate (21) is provided with a lower channel (215), which is vertically and vertically corresponding to and connected to the through hole (118). The lower channel (215) is connected to the lower interlayer space (23), and a lower one-way valve (218) is provided in the lower channel (215).

2. The sample solution filter tray self-pressurizing structure according to claim 1, characterized in that, The top wall of the first cavity is fixed with a plurality of upper groove shoulders (113), the upper groove shoulders (113) abut against the top surface of the filter membrane (3), the plurality of upper groove shoulders (113) form at least one upper groove (114), the starting end of the upper groove (114) is connected to the upper liquid inlet (111), the end of the upper groove (114) is connected to a second upper through hole (116), the second upper through hole (116) is opened in the upper substrate (11), and the second upper through hole (116) is connected to the upper liquid outlet (112).

3. The sample solution filter tray self-pressurizing structure according to claim 2, characterized in that, The bottom wall of the second cavity is fixed with a plurality of lower groove shoulders (212). The lower groove shoulders (212) and the upper groove shoulders (113) are arranged symmetrically above and below each other. The lower groove shoulders (212) abut against the bottom surface of the filter membrane (3). The plurality of lower groove shoulders (212) form at least one lower groove (213). The end of the lower groove (213) is connected to a lower through hole (214). The lower through hole (214) is opened in the lower substrate (21) and is connected to the lower liquid outlet (211).

4. The sample solution filter tray self-pressurizing structure according to claim 3, characterized in that, The bottom surface of the upper substrate (11) is provided with an upper step (119), which surrounds the outer edge of the first cavity. The upper step (119) is flush with the bottom end of the upper groove shoulder (113). The top surface of the lower substrate (21) is provided with a lower step (216), which surrounds the outer edge of the second cavity. The top end of the lower groove shoulder (212) is flush with the top surface of the lower step (216). The upper step (119) and the lower step (216) are arranged vertically and vertically respectively. The outer edge of the filter membrane (3) is located between the upper step (119) and the lower step (216).

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