CN211215599U - Filtering device - Google Patents

Abstract

The application relates to the technical field of filtration, in particular to a filtering device, which comprises a filter cartridge and a filter membrane; the interior of the filter cartridge is provided with a hollow inner cavity and a guide cylinder which are communicated with each other, and the bottom wall of the filter cartridge is provided with a through hole; the first end of the guide cylinder is communicated with the first end of the through hole, and the second end of the guide cylinder is communicated with the inner cavity of the filter cylinder; the filter membrane is used for plugging the second end of the through hole, so that liquid enters the inner cavity of the filter cylinder through the filter membrane, the through hole and the guide cylinder in sequence. This application is when using, and the second end of through-hole is plugged up to the filter membrane, then injects the bottom of cartridge filter in the stoste of waiting to separate, and under the pressure effect of outside, the stoste of waiting to separate separates in filter membrane department, and the supernatant sees through the filter membrane and enters into the inner chamber of cartridge filter along through-hole and draft tube. This application has improved separation efficiency through pressure to have easy operation, the separation is quick and steerable filtering flux's advantage, solved prior art effectively and have had the technical problem that complex operation is complicated.

Description

Filtering device

Technical Field

The application relates to the technical field of filtration, in particular to a filtering device.

Background

In the laboratory, the supernatant is usually obtained by filtration with a common funnel, centrifugation, or the like. The common funnel is adopted to filter only under the action of gravity, the separation speed is slow, and the supernatant cannot be obtained quickly; by adopting a centrifugal separation mode, substance molecules in the separation liquid are easy to damage in the centrifugal process, and effective and complete supernatant is not easy to obtain. In addition, in the prior art, a plurality of steps such as injection, separation, extraction and the like are required during filtration, and the operation process is complicated.

SUMMERY OF THE UTILITY MODEL

In view of this, the present application aims to provide a filtering apparatus, which effectively solves the technical problem of complex operation in the prior art, and has the advantages of simple operation and rapid separation.

In order to achieve the purpose, the application provides the following technical scheme:

a filtration device comprising a filter cartridge and a filter membrane; the interior of the filter cylinder is provided with a hollow inner cavity and a guide cylinder which are communicated with each other, and the bottom wall of the filter cylinder is provided with a through hole; the first end of the guide cylinder is communicated with the first end of the through hole, and the second end of the guide cylinder is communicated with the inner cavity of the filter cylinder; the filter membrane is used for plugging the second end of the through hole, so that liquid enters the inner cavity of the filter cylinder through the filter membrane, the through hole and the guide cylinder in sequence.

Preferably, in the above-mentioned filtering apparatus, a groove with an opening facing the filter membrane is provided at the bottom of the filter cartridge, so that the through hole, the groove and the filter membrane are sequentially communicated; the groove is internally provided with a bulge which is abutted against the filter membrane.

Preferably, in the above-mentioned filter device, the protrusion has a cross shape or a plum blossom shape.

Preferably, in the above-mentioned filter device, the diameter of the through hole is 0.3mm to 1.5 mm.

Preferably, in the above-mentioned filter device, the through hole is stepped, and a small diameter end of the through hole is located at a side close to the filter membrane.

Preferably, in the above-mentioned filter device, a side wall of the guide cylinder is disposed in close contact with an inner side wall of the filter cartridge.

Preferably, in the above-mentioned filtering device, the filter membrane includes a small pore membrane and a large pore membrane, and the small pore membrane is disposed near the through hole.

Preferably, in the above-mentioned filtering apparatus, an installation cylinder for clamping the filter membrane on the filter cartridge is sleeved at the bottom of the filter cartridge, the installation cylinder is detachably connected to the filter cartridge, and a liquid inlet hole is formed at the bottom of the installation cylinder.

Preferably, in the above-mentioned filter device, the filter cartridge is sleeved with a sealing ring, so that the filter cartridge is connected with the mounting cylinder in a sealing manner.

Preferably, in the above-mentioned filter device, a sealing cover is sleeved on the top of the filter cartridge, and the sealing cover is detachably connected with the filter cartridge.

Compared with the prior art, the beneficial effects of this application are:

the application provides a filter device, which comprises a filter cartridge and a filter membrane; the interior of the filter cylinder is provided with a hollow inner cavity and a guide cylinder which are communicated with each other, and the bottom wall of the filter cylinder is provided with a through hole; the first end of the guide cylinder is communicated with the first end of the through hole, and the second end of the guide cylinder is communicated with the inner cavity of the filter cylinder; the filter membrane is used for plugging the second end of the through hole, so that liquid enters the inner cavity of the filter cylinder through the filter membrane, the through hole and the guide cylinder in sequence. This application is when using, can install the second end that the through-hole was plugged up to the filter membrane shutoff, then inject the bottom of cartridge filter in the stoste of treating the separation, under the pressure effect of outside, the stoste of treating the separation separates in filter membrane department, the supernatant sees through the filter membrane and enters into the inner chamber of cartridge filter along through-hole and draft tube, when the supernatant of treating in the cartridge filter inner chamber reaches required volume, can separate whole cartridge filter and stoste, the liquid route in the through-hole can break off at once, make the separation between supernatant after the filtration completion and the stoste, thereby the volume of control supernatant. This application can improve the separation efficiency of stoste in filter membrane department through pressure to have easy operation, separation advantage fast and steerable filtration flux.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a filtering apparatus according to an embodiment of the present disclosure;

FIG. 2 is a schematic structural diagram of another filtering apparatus provided in the embodiments of the present application;

FIG. 3 is an exploded view of a mounting cartridge for mounting a filter membrane to a filter cartridge according to an embodiment of the present disclosure;

FIG. 4 is a perspective view of a mounting cartridge for mounting a filter membrane to a filter cartridge according to an embodiment of the present disclosure;

FIG. 5 is a cross-sectional view of a filter cartridge according to an embodiment of the present application;

fig. 6 is a bottom view of a filter cartridge according to an embodiment of the present disclosure;

fig. 7 is a top view of a filter cartridge according to an embodiment of the present disclosure.

In the figure:

1 is a filter cartridge, 11 is a groove, 12 is a bulge, 2 is a filter membrane, 3 is a guide cylinder, 31 is a through hole, 4 is an installation cylinder, 41 is a liquid inlet hole, 5 is a sealing ring, 6 is a sealing cover, and 7 is a thread.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the embodiments of the present application and simplifying the description, but do not indicate or imply that the referred devices or elements must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the embodiments of the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present application, it should be noted that the terms "mounted," "connected," and "connected" are used broadly and are defined as, for example, a fixed connection, an exchangeable connection, an integrated connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, and a communication between two elements, unless otherwise explicitly stated or limited. Specific meanings of the above terms in the embodiments of the present application can be understood in specific cases by those of ordinary skill in the art.

The utility model aims at providing a filter equipment, can be applicable to the staff and separate the supernatant that is less than 1.5 mu m diameter in the blood solution fast accurately, solve prior art effectively and have complex operation complicated technical problem, have easy operation and the quick advantage of separation. However, the present application can also be applied to the separation of lymphocytes and biomarkers from various body fluids (hydrothorax, ascites, pericardial effusion, etc.), and the details are not repeated in the present application.

Referring to fig. 1 to 7, the present embodiment provides a filtering apparatus, which includes a filter cartridge 1 and a filter membrane 2; the interior of the filter cartridge 1 is provided with a hollow inner cavity and a guide cylinder 3 which are communicated with each other, and the bottom wall of the filter cartridge 1 is provided with a through hole 31; the first end of the guide cylinder 3 is communicated with the first end of the through hole 31, and the second end of the guide cylinder 3 is communicated with the inner cavity of the filter cylinder 1; the filter membrane 2 is used for plugging the second end of the through hole 31, so that the liquid enters the inner cavity of the filter cartridge 1 through the filter membrane 2, the through hole 31 and the guide cylinder 3 in sequence.

This application is when using, can install the second end that filter membrane 2 plugged up through-hole 31, then inject the bottom of cartridge filter 1 in waiting to separate the stoste, under the pressure effect of outside, the stoste of waiting to separate separates in filter membrane 2 department, the supernatant sees through filter membrane 2 and enters into the inner chamber of cartridge filter 1 along through-hole 31 and draft tube 3, when the supernatant of waiting to filter cartridge filter 1 inner chamber reaches required volume, can separate whole cartridge filter 1 and stoste, the liquid way in the through-hole 31 can break off at once, make the separation between supernatant after the filtration completion and the stoste, thereby the volume of control supernatant. This application can improve the separation efficiency of stoste in filter membrane 2 department through pressure to have easy operation, separation advantage fast and steerable filtration flux.

More specifically, as shown in fig. 1, the filter membrane 2 is fixedly installed at the bottom of the filter cartridge 1, the bottom of the guide cylinder 3 can be fixedly connected with the bottom of the filter cartridge 1 in a sealing manner, or can be integrally formed with the filter cartridge 1, the stock solution is filtered at the communication position of the filter membrane 2 and the through hole 31, and the separated supernatant can flow into the inner cavity of the filter cartridge 1 through the fine through hole 31. Of course, the filter membrane 2 may also be sealingly mounted directly in the second end of the through-hole 31, but this provides for a single use of the filter membrane 2, whereas the filter membrane 2 covering the bottom of the filter cartridge 1 may be reused several times. In addition, in order to facilitate the staff to see the liquid level in the inner cavity of the filter cartridge 1, the whole filter cartridge 1 can be made of transparent material, and scale marks can be carved on the outer wall of the filter cartridge 1, wherein the zero scale marks are flush with the inner bottom wall of the filter cartridge 1, so that the staff can control the amount of the extracted supernatant. Meanwhile, the number of the through holes 31 is not limited to 1, and the number of the through holes 31 can be set according to actual needs. The separation of the filter cartridge 1 from the stock solution can be realized by lifting the filter cartridge 1 upwards by an operator, and can also be realized by moving the filter cartridge 1 upwards by a machine.

Further, as shown in fig. 2, in the present embodiment, the bottom of the filter cartridge 1 is sleeved with an installation cylinder 4 for clamping the filter membrane 2 on the filter cartridge 1, the installation cylinder 4 is detachably connected to the filter cartridge 1, and the bottom of the installation cylinder 4 is provided with a liquid inlet hole 41. After long-term use, the micropores of the filter membrane 2 inevitably become clogged with minute substances, and the separation efficiency thereof decreases as the use time becomes longer. And different filter membranes 2 are also needed when different stock solutions are filtered. For the change of convenient filter membrane 2, can adopt detachable installation section of thick bamboo 4 and filter membrane 2, make things convenient for the timely filter membrane 2 of more renewing of staff, and then enlarged the application range of this application.

More specifically, referring to fig. 3 and 4, a groove for placing the filter membrane 2 is formed inside the mounting cylinder 4, and the liquid inlet hole 41 of the mounting cylinder 4 facilitates the raw liquid to enter the mounting cylinder 4 and to permeate the filter membrane 2 for filtration. The inner wall of installation section of thick bamboo 4 can be equipped with the internal thread simultaneously, and the bottom of cartridge filter 1 is equipped with the external screw thread 7 with installation section of thick bamboo 4 looks adaptation. Through placing filter membrane 2 in installation section of thick bamboo 4, then rotatory installation section of thick bamboo 4 makes installation section of thick bamboo 4 cover locate on cartridge filter 1, and then makes filter membrane 2 be located between feed liquor hole 41 and through-hole 31. The mounting cylinder 4 and the filter cylinder 1 which are connected by screw thread have the advantages of convenient disassembly and assembly and simple operation. Of course, the installation cylinder 4 and the filter cylinder 1 can also adopt other detachable connection modes (for example, installation modes such as a buckle or a screw fixation), and are not repeated in this application.

Further, as shown in fig. 2, in the present embodiment, the filter cartridge 1 is sleeved with a sealing ring 5, so that the filter cartridge 1 is hermetically connected with the mounting cylinder 4. When the installation cylinder 4 is sleeved on the filter cylinder 1, because a gap exists between the inner wall of the installation cylinder 4 and the outer wall of the filter membrane 2 and a gap also exists at the joint of the installation cylinder 4 and the filter cylinder 1, when liquid enters from the liquid inlet hole 41, part of the liquid can pass through the gaps and leak out of the filter cylinder 1. And the setting of sealing washer 5 can plug up the connecting gap of installation section of thick bamboo 4 and cartridge filter 1 for the difficult hourglass of liquid that enters into installation section of thick bamboo 4 makes the stoste can normally filter in filter membrane 2 department.

More specifically, referring to fig. 2, the sealing ring 5 may be sleeved on the bottom of the filter cartridge 1, or may be sleeved on the filter cartridge 1 and the mounting cylinder 4 when the outer wall of the bottom of the filter cartridge 1 is flush with the outer wall of the mounting cylinder 4, and at this time, the gap between the filter cartridge 1 and the mounting cylinder 4 is covered by the sealing ring 5. The seal ring 5 is made of a common sealing material (e.g., rubber).

Further, as shown in fig. 2, in the present embodiment, a sealing cover 6 is sleeved on the top of the filter cartridge 1, and the sealing cover 6 is detachably connected with the filter cartridge 1. The setting of sealed lid 6 can be in filterable unscrewing the gassing, and the inner chamber of cartridge filter 1 is got into from through-hole 31 to the liquid of being convenient for, and sealed lid 6 also can be screwed up after filtering the completion, avoids the entering of air, also can avoid liquid to volatilize and leak.

More specifically, referring to fig. 2, the top periphery of the filter cartridge 1 extends outward to form a support plate, which is convenient for the worker to mount the entire filter cartridge 1 in the desired apparatus. The top of layer board is equipped with sealed 6 installation departments, and the installation department periphery is equipped with the external screw thread, and the inner wall of sealed 6 and the outer wall threaded connection of installation department are sealed. The sealing cover 6 and the filter cylinder 1 which are connected by the thread have the advantages of convenient assembly and disassembly and simple operation. Of course, the sealing cover 6 and the filter cartridge 1 can also adopt other detachable connection modes (such as installation modes of buckle or bolt fixation), and the description is omitted in the application.

Further, the filter membrane 2 comprises a small pore membrane and a large pore membrane, the small pore membrane is arranged close to the through hole 31, the filter membrane 2 adopts a double-layer membrane structure formed by the small pore membrane and the large pore membrane, and the small pore membrane is positioned on one side of the large pore membrane close to the through hole 31, so that the filtering precision of the filter membrane 2 is gradually increased. The filter membrane 2 with the double-layer membrane structure can improve the filtering effect of the filter membrane 2, can also improve the pressure resistance of the filter membrane 2, and avoids the filter membrane 2 from being broken or crushed by the liquid pressure.

More specifically, the filter device of the present application may also use a filter membrane 2 for separating other solutions (such as suspension, microsphere or nanoparticle solution) for separating other solutions, besides using the filter membrane 2 for separating body fluid, which is not described in detail herein.

Further, in the present embodiment, as shown in fig. 2, the bottom of the filter cartridge 1 is provided with a groove 11 opening toward the filter membrane 2, so that the through hole 31, the groove 11 and the filter membrane 2 are communicated in sequence; the groove 11 is internally provided with a bulge 12, and the bulge 12 is abutted against the filter membrane 2. As shown in fig. 6, the arrangement of the grooves 11 can increase the area of the filter membrane 2 participating in the filtering operation, thereby improving the filtering efficiency of the filter membrane 2, and the through holes 31 are not easy to be blocked. Because need insert whole cartridge filter 1 toward the stoste of waiting to separate when filtering, at this moment filter membrane 2 can receive and come from the ascending pressure of stoste, filters the atress for a long time and leads to filter membrane 2 to warp or damaged easily, and the setting of arch 12 can play the effect of supporting filter membrane 2, and filter membrane 2 that the too big arouses of pressure when having avoided pushing down warp or damaged. Wherein the protrusions 12 may be fixed to the bottom of the recess 11 by welding or bonding, or may be integrally formed with the filter cartridge 11.

Further, as shown in fig. 6, in the present embodiment, the protrusions 12 have a cross shape or a plum blossom shape. When the filter cartridge 1 reaches the required height of inner chamber, lift filter cartridge 1 and make the liquid circuit disconnection of through-hole 31, the recess 11 is flowed back to the supernatant in the through-hole 31, because the supernatant can't vertically permeate through filter membrane 2 once, therefore the whole recess 11 can be covered with to the supernatant. The protrusions 12 are formed as a polygonal shape with curved edges to guide the liquid to flow along the edges of the protrusions 12, and further to guide the backflow liquid to flow out of the filter cartridge 1 from other portions of the filter membrane 2.

Further, in the present embodiment, the diameter of the through hole 31 is 0.3mm to 1.5 mm. In order to facilitate the staff to obtain a certain amount of supernatant, the speed of the supernatant entering the inner cavity of the filter cartridge 1 needs to be limited, so the through holes 31 need to be set to have a micro-aperture, and meanwhile, the through holes 31 with the micro-aperture can interrupt the liquid circulation of the through holes 31 only by lightly shaking (for example, the staff gently throws or lifts), so as to rapidly stop the liquid in the through holes 31 from entering the inner cavity of the filter cartridge 1. However, the through holes 31 cannot be too small, which affects the rate at which the filter cartridge 1 takes the supernatant. When the diameter of the through hole 31 is 0.3 mm-1.5 mm, the filtering efficiency of the filtering device can be ensured, the liquid path of the through hole 31 can be rapidly interrupted, and then the working personnel can be ensured to control the acquisition amount of the supernatant.

Further, as shown in fig. 5, in the present embodiment, the through hole 31 is stepped, and the small diameter end of the through hole 31 is located on the side close to the filter membrane 2. Because the length of the through hole 31 is the sum of the height of the guide cylinder 3 and the thickness of the bottom wall of the filter cylinder 1, the longer the length is, the higher the probability of blockage of the tiny through hole 31 is, and the service life of the filter device is influenced. In order to reduce the possibility of blocking the through hole 31, the through hole 31 may be formed in a step shape, and the small diameter end of the through hole 31 with a constant aperture may still ensure that the liquid path of the through hole 31 can be interrupted rapidly.

More specifically, when the diameter of the small-diameter end of the through-hole 31 is 0.3mm to 1.5mm, the length of the small-diameter end of the through-hole 31 is 2mm, and the diameter of the large-diameter end of the through-hole 31 is 1.2mm, the separation efficiency and the control effect are the best. The aperture of the guide shell 3 may be the same as the diameter of the large-diameter end of the through hole 31, or may be larger than the diameter of the large-diameter end of the through hole 31.

Further, as shown in fig. 7, in the present embodiment, the side wall of the guide cylinder 3 is disposed closely to the inner side wall of the filter cartridge 1. Because the through hole 31 is smaller, the liquid pressure sprayed out from the through hole 31 of the guide shell 3 is also large in the pressure state, and the guide shell 3 arranged close to the wall can increase the stability of the column body. And after whole filter equipment acquireed the supernatant, the experimenter needs to take partial sample liquid to experiment, if draft tube 3 sets up in the middle, is unfavorable for the rifle head to insert cartridge filter 1 sample.

More specifically, referring to fig. 7, the top of the guide cylinder 3 may be inclined, and the upper side of the top of the guide cylinder 3 is tightly attached to the inner wall of the filter cartridge 1, so that the liquid in the guide through hole 31 can be conveniently guided into the inner cavity of the filter cartridge 1. The height of draft tube 3 can set up according to actual need, and draft tube 3 and cartridge filter 1 can be through corresponding mould integrated into one piece moreover.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A filtration apparatus comprising a filter cartridge and a filter membrane;

the interior of the filter cylinder is provided with a hollow inner cavity and a guide cylinder which are communicated with each other, and the bottom wall of the filter cylinder is provided with a through hole;

the first end of the guide cylinder is communicated with the first end of the through hole, and the second end of the guide cylinder is communicated with the inner cavity of the filter cylinder;

the filter membrane is used for plugging the second end of the through hole, so that liquid enters the inner cavity of the filter cylinder through the filter membrane, the through hole and the guide cylinder in sequence.

2. The filtration device according to claim 1, wherein the bottom of the filter cartridge is provided with a groove opening toward the filter membrane, so that the through hole, the groove and the filter membrane are communicated in sequence;

the groove is internally provided with a bulge which is abutted against the filter membrane.

3. The filter device of claim 2, wherein the protrusions are cross-shaped or plum blossom-shaped.

4. The filter device according to claim 1, wherein the diameter of the through-hole is 0.3mm to 1.5 mm.

5. The filter device according to claim 1, wherein said through-hole is stepped, and a small-diameter end of said through-hole is located on a side close to said filter membrane.

6. The filter apparatus of claim 1, wherein the sidewall of the draft tube is positioned against the inner sidewall of the filter cartridge.

7. The filtration device of claim 1, wherein the filter membrane comprises a small pore membrane and a large pore membrane, the small pore membrane being disposed proximate to the through-hole.

8. The filter device as claimed in claim 1, wherein the bottom of the filter cartridge is sleeved with a mounting cylinder for clamping the filter membrane on the filter cartridge, the mounting cylinder is detachably connected with the filter cartridge, and the bottom of the mounting cylinder is provided with a liquid inlet hole.

9. The filter apparatus of claim 8, wherein the filter cartridge is fitted with a gasket to sealingly connect the filter cartridge to the mounting cartridge.

10. The filter device as claimed in claim 1, wherein a sealing cover is sleeved on the top of the filter cartridge, and the sealing cover is detachably connected with the filter cartridge.

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