Grading suction filtration device

Abstract

The utility model belongs to the technical field of laboratory suction filtration separation, and discloses a multi-stage suction filtration device which comprises a liquid collection seat, an interception assembly and a heating assembly, the liquid collecting seat is provided with a liquid inlet and a liquid outlet; each interception assembly comprises a containing cavity, a filtering part is arranged at the end, close to the liquid collecting base, of the containing cavity, the number of the interception assemblies is at least two, the at least two interception assemblies are connected in series and communicate with the liquid inlet, and the filtering radius of the filtering part is gradually reduced from the direction away from the liquid collecting base to the direction close to the liquid collecting base; the heating assembly is arranged on the liquid collecting seat and / or the interception assembly. When an experiment operator carries out suction filtration, a to-be-detected sample sequentially passes through the filtering pieces with the filtering radiuses sequentially reduced, particles with larger particle sizes are intercepted firstly, particles with smaller particle sizes are intercepted later, and intercepted objects are positioned in the accommodating cavities of the interception assemblies, so that different particles can be obtained from different accommodating cavities; meanwhile, the heating assembly can heat a sample to be filtered during suction filtration, so that the suction filtration effect on a reaction product is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of laboratory suction filtration separation, especially to a multistage suction filtration device. BACKGROUND

[0002] Suction filtration is a common solid-liquid separation method, which uses a suction pump to generate negative pressure to make the sample to be filtered connected with the suction pump generate directional flow, and then sets a filter medium in the flow path to intercept solids when the sample to be filtered flows through the filter medium, so as to achieve the purpose of solid-liquid separation. Generally, suction filtration can be applied to the fields of experiment, production and manufacturing, medical examination, etc.

[0003] Among them, when the sample solution is subjected to solid-liquid separation by suction filtration in the laboratory, dry-wet separation is first realized by suction filtration, and then drying is performed to prepare the solid product for the next experimental analysis. However, for sample solutions containing particle materials of different particle sizes, the different mesh sieves need to be used for separation after drying to process various products of different particle sizes, which is relatively cumbersome and affects the experimental efficiency. In addition, when suction filtration is performed in the laboratory, some samples need to be separated by heating and suction filtration. This method usually uses an alcohol lamp to heat a hot filter funnel provided with a water injection interlayer for filtration, which is relatively troublesome and has safety hazards; or the Buchner funnel is heated in advance, and then the hot filtration experiment is performed, which is time-consuming and has a short heat preservation time. UTILITY MODEL CONTENTS

[0004] The utility model aims to provide a multistage suction filtration device to intercept particles of different particle sizes at different positions during suction filtration, facilitate experimental operators to obtain different particles, and improve the temperature during suction filtration to ensure the suction filtration effect.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A multistage suction filtration device, comprising:

[0007] A liquid collecting seat provided with a liquid inlet and a liquid outlet;

[0008] A separation assembly comprising a containing cavity, one end of the containing cavity close to the liquid collecting seat is provided with a filter element, the separation assembly is provided with at least two, the at least two separation assemblies are connected in series and communicated with the liquid inlet, and the filter radii of the filter elements in different interception assemblies gradually decrease from the direction away from the liquid collecting seat to the direction close to the liquid collecting seat;

[0009] A heating assembly arranged on the liquid collecting seat and / or the separation assembly.

[0010] As preferably, the fractional filtration device is further provided with a cover, which is detachably capped on the end of the separation component away from the liquid collecting base.

[0011] As preferably, the separation component comprises an upper connecting part and a lower connecting part, the upper connecting part being detachably connected with the lower connecting part of the adjacent separation component or with the cover, and the lower connecting part being detachably connected with the upper connecting part of the adjacent separation component or with the liquid inlet.

[0012] As preferably, the connection between the liquid collecting base and the separation component, between two adjacent separation components and between the separation component and the cover is socket connection.

[0013] As preferably, the connection between the liquid collecting base and the separation component, between two adjacent separation components and between the separation component and the cover is provided with a limiting part.

[0014] As preferably, the bottom of the cover, the upper connecting part, the lower connecting part and the outer peripheral wall of the liquid inlet are provided with annular protrusions.

[0015] As preferably, the connection between the liquid collecting base and the separation component, between two adjacent separation components and between the separation component and the cover is provided with annular sealing rings.

[0016] As preferably, the liquid collecting base, the separation component and the cover are all glass pieces.

[0017] As preferably, the filter piece is a filter screen, and the mesh number of the filter screen is mesh- mesh.

[0018] As preferably, the heating component is a heating tape, which is wound on the outer surface of the liquid collecting base and / or the separation component.

[0019] Beneficial effects:

[0020] The utility model provides a kind of fractional filtration device, it includes liquid collecting seat, intercepting component and heating component.Liquid collecting seat is provided with inlet and outlet;Intercepting component includes accommodating cavity, and the one end of accommodating cavity is close to liquid collecting seat and is provided with filter element, intercepting component is provided with at least two, at least two intercepting components are connected in series and are communicated with inlet, and the filter radius of filter element gradually decreases from the direction of far from liquid collecting seat to the direction of close to liquid collecting seat;Heating component is arranged in liquid collecting seat and / or intercepting component.When experimental operator carries out suction filtration, it will make the sample to be measured successively pass through filter element of filter radius successively decreasing, and the particle of larger particle size is first intercepted, and the particle of smaller particle size is then intercepted, and the intercepted particle is left in the accommodating cavity of the intercepting component, so that experimental operator can obtain different particles from different accommodating cavities;Meanwhile, heating component can heat and warm the sample to be filtered during suction filtration, to ensure the suction filtration effect of reaction product. BRIEF DESCRIPTION OF DRAWINGS

[0021] Fig. 1 It is the structure explosion drawing of the fractional filtration device provided by the utility model;

[0022] Fig. 2 It is the structure schematic diagram of one embodiment of the fractional filtration device provided by the utility model;

[0023] Fig. 3 It is the structure schematic diagram of another embodiment of the fractional filtration device provided by the utility model.

[0024] In the drawing:

[0025] 1, liquid collecting seat;11, outlet;2, intercepting component;21, upper connecting part;22, lower connecting part;23, filter element;3, cover;4, annular sealing ring. DETAILED DESCRIPTION

[0026] The utility model will be further explained in detail in combination with the drawings and embodiments.It can be understood that the specific embodiments described herein are only used to explain the utility model, and not limit the utility model.In addition, it needs to be explained that, for the convenience of description, only part related to the utility model is shown in the drawing, not all structures.

[0027] In the description of the utility model, unless another explicit provision and limitation, the term "connection", "connect", "fix" should be broad-sense understanding, for example, it can be fixed connection, or detachable connection, or integral;It can be mechanical connection, or electrical connection;It can be directly connected, or indirectly connected through intermediate medium, it can be the communication inside two elements or the interaction relationship of two elements.For ordinary skilled in the art, the specific meaning of above-mentioned term in the utility model can be understood according to specific circumstances.

[0028] In the utility model, unless another definite provision and limitation, first feature is in second feature "on" or "under" can include that first and second features are in direct contact, also can include that first and second features are not in direct contact but contact through other feature between them. Moreover, first feature is in second feature "on", "above" and "upper surface" include that first feature is in second feature directly above and obliquely above, or only indicate that first feature horizontal height is higher than second feature. First feature is in second feature "under", "below" and "under" include that first feature is in second feature directly below and obliquely below, or only indicate that first feature horizontal height is less than second feature.

[0029] In the description of the embodiment, the terms "upper", "lower", "right", "left", "horizontal", "vertical", and "radial" are terms that refer to the orientation and / or position of the device or element shown in the drawings, and are used only to facilitate the description and simplify the operation, and do not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are only used to distinguish in the description, and have no special meaning.

[0030] As shown in Figs. 1-3 The utility model provides a fractional filtration device, it includes liquid collecting seat 1, trapping component 2 and heating component, liquid collecting seat 1 is provided with liquid inlet and liquid outlet 11, and the liquid inlet of liquid collecting seat 1 is used to receive the liquid product after filtration, and the liquid outlet 11 is used to connect with the collection equipment to export the liquid product. Further, the liquid collecting seat 1 is funnel-shaped base, and the funnel-shaped base has good flow guiding effect, which facilitates the introduction of the filtered liquid into the filtration bottle. Further, the funnel-shaped base is located at the bottom of the fractional filtration device, the liquid inlet is located above, and the liquid outlet 11 is located below, which facilitates the downward flow and accumulation of the liquid under the action of gravity.

[0031] The trapping assembly 2 comprises a containing cavity, and the containing cavity is provided with a filter 23 near one end of the liquid collecting seat 1. The trapping assembly 2 is provided with at least two trapping assemblies 2, the at least two trapping assemblies 2 are connected in series and communicate with the liquid inlet, and the filter radius of the filter 23 in different trapping assemblies 2 gradually decreases from the direction far away from the liquid collecting seat 1 to the direction close to the liquid collecting seat 1. When performing suction filtration, the sample to be filtered enters the containing cavity and passes through the filter 23 under the action of negative pressure. The sample to be filtered passes through the filter 23 with gradually decreasing filter radius in sequence before reaching the liquid collecting seat 1. It can be understood that the experimental operator can select the filter 23 with a corresponding filter radius according to the desired particles. When passing through the filter 23, particles with a larger particle size are first trapped, and particles with a smaller particle size pass through the filter 23 and enter the containing cavity of the next trapping assembly 2 and are trapped by the filter 23 with a smaller filter radius. The trapped particles are left in the containing cavity of the trapping assembly 2, so the experimental operator can obtain different particles from different containing cavities. Further, the adjacent trapping assemblies 2 and the trapping assembly 2 and the liquid collecting seat 1 are detachably connected, which facilitates the experimental operator to separate the above-mentioned parts to obtain the suction filtration product or replace the trapping assembly 2. In some other embodiments, the liquid collecting seat 1 and the plurality of trapping assemblies 2 can be integrally formed, and a material taking opening for obtaining the suction filtration product can be formed in the trapping assembly 2.

[0032] The heating assembly is arranged on the liquid collecting seat 1 and / or the trapping assembly 2. The heating assembly can heat and warm the sample to be filtered during suction filtration, thereby ensuring the suction filtration effect of the reaction product. It can be understood that the heating assembly can be integrally connected with other parts or can be detachably connected.

[0033] Specifically, in the present embodiment, the fractional suction filtration device further comprises a cover 3, which is detachably arranged at the end of the trapping assembly 2 away from the liquid collecting seat 1. The containing cavity of the trapping assembly 2 is provided with an opening to facilitate the sample to be filtered to enter the containing cavity and then pass through the filter 23. Covering the opening of the trapping assembly 2 with the cover 3 can prevent dirt in the external environment from entering the containing cavity and contaminating the subsequent sample to be filtered during daily storage. The cover 3 can be removed during suction filtration, and the suction pump can make the pressure on one side of the sample to be filtered equal to atmospheric pressure and the pressure on the other side less than atmospheric pressure, thereby generating flow. Further, a liquid passage hole that can communicate with the outside can be formed on the cover 3, and the liquid passage hole is connected with a pipeline for providing the sample to be filtered. At this time, suction filtration can be performed after the cover 3 is covered, and suction filtration can be performed at the same time as the sample to be filtered is filled in, so as to avoid the cover 3 from blocking the opening of the containing cavity and causing the sample to be filtered to be insufficiently subjected to air pressure during the suction filtration process, thereby being difficult to flow out.

[0034] In some other embodiments, the cover 3 can not be provided, but the size of the corresponding opening of the containing cavity can be reduced, and a liquid passage pipeline for providing the sample to be filtered can be connected with the opening.

[0035] Further, in the embodiment, the base, the trapping assembly 2 and the cover 3 are sequentially arranged in the vertical direction from bottom to top in the multi-stage filtering device. The sample to be filtered can flow out under the dual action of its own gravity and the suction pump, which is conducive to accelerating the filtration speed.

[0036] Further, in the embodiment, the trapping assembly 2 includes an upper connecting part 21 and a lower connecting part 22. The upper connecting part 21 is detachably connected with the lower connecting part 22 of the adjacent trapping assembly 2 or the cover 3. The lower connecting part 22 is detachably connected with the upper connecting part 21 of the adjacent trapping assembly 2 or the liquid inlet. The trapping assembly 2 has a tubular structure as a whole. The outer diameter of the lower connecting part 22 is slightly smaller than the inner diameter of the upper connecting part 21. Similarly, the outer diameter of the lower connecting part 22 is also slightly smaller than the inner diameter of the liquid inlet of the liquid collecting base 1. At the same time, the cover 3 is also provided with a connecting structure similar to the lower connecting part 22 to engage with the upper connecting part 21 and cover the trapping assembly 2. The trapping assembly 2 can be engaged with the upper connecting part 21 of the adjacent trapping assembly 2 or the liquid inlet in the liquid collecting base 1 through the lower connecting part 22 itself to realize the flow of the sample to be filtered. At the same time, since the connection mode is detachable connection, the number of trapping assemblies 2 of the multi-stage filtration device can be adjusted according to experimental requirements. For example, if there are three trapping assemblies 2, one trapping assembly 2 can be removed according to the requirements to realize two-stage trapping separation of the sample to be filtered.

[0037] Further, in the embodiment, the liquid collecting base 1 and the trapping assembly 2, the adjacent two trapping assemblies 2 and the trapping assembly 2 and the cover 3 are all socket connections. Socket connection is a connection mode in which the end of one pipe is inserted into the inside of another pipe. In the embodiment, the connection effect between the components of the multi-stage filtration device is caused by the specific structure of the upper connecting part 21 and the lower connecting part 22. Socket connection makes it easy to disassemble and assemble the components of the multi-stage filtration device. Only the components need to be aligned and matched, which is conducive to the operation of the experimental operator.

[0038] In some other embodiments, the liquid collecting base 1 and the trapping assembly 2, the adjacent two trapping assemblies 2 and the trapping assembly 2 and the cover 3 can also be clamp connections, threaded connections or flange connections, and corresponding upper connecting parts 21 and lower connecting parts 22 are provided. The embodiment does not limit this.

[0039] Further, in the embodiment, the liquid collecting base 1 and the trapping assembly 2, the adjacent two trapping assemblies 2 and the trapping assembly 2 and the cover 3 are all provided with limiting parts. When the components are assembled and matched, axial insertion is required. The limiting parts can ensure that the components are fixed after being axially inserted to a fixed position, so as to avoid the side wall of the socket connection being cracked under the action of external force.

[0040] Further, in the embodiment, the bottom of the cover 3, the upper connecting part 21, the lower connecting part 22 and the outer peripheral wall of the liquid inlet are all provided with annular protrusions. The annular protrusions of each part can abut against each other to achieve a limiting function. Taking the lower connecting part 22 of a trapping assembly 2 and the upper connecting part 21 of an adjacent trapping assembly 2 as an example, during the spigot connection process, the lower connecting part 22 is inserted into the upper connecting part 21, and after being inserted to a sufficient depth, the annular protrusions of the lower connecting part 22 fully abut against the annular protrusions of the upper connecting part 21, avoiding structural damage caused by excessive insertion. At the same time, the annular protrusions have sufficient contact surfaces, which can also avoid radial shaking of adjacent trapping assemblies 2. The annular protrusions at other positions have the same function, which will not be described here.

[0041] Further, in the embodiment, annular sealing rings 4 are arranged between the liquid collecting seat 1 and the trapping assembly 2, between two adjacent trapping assemblies 2 and between the trapping assembly 2 and the cover 3. The annular sealing rings 4 are arranged at the outer peripheral wall of the lower connecting part 22 and at the outer peripheral wall of the bottom of the cover 3, and after assembly, the annular sealing rings 4 can cooperate with adjacent parts to achieve a sealed connection. The annular sealing rings 4 can ensure the sealing of the multi-stage filtration device, avoiding the leakage of the sample to be filtered from the gaps between the connecting positions of the parts to the outside. Further, the annular sealing rings can be rubber parts, which have good wear resistance and corrosion resistance, avoiding damage during long-term use.

[0042] Specifically, in the embodiment, the filter 23 is a filter screen, and the mesh number of the filter screen is 10-400. In some other embodiments, a filter structure such as a filter core ultrafiltration membrane can also be arranged, which is not limited in the embodiment.

[0043] Specifically, in the embodiment, the liquid collecting seat 1, the trapping assembly 2 and the cover 3 are all glass parts. The glass parts have good thermal conductivity and corrosion resistance, and when a heating assembly is used for heating, the glass parts can better conduct heat to heat the sample to be filtered. Further, the liquid collecting seat 1, the trapping assembly 2 and the cover 3 are all made of transparent glass, and the experimental operator can directly monitor the filtration process of the sample to be filtered through the transparent glass, which is convenient for process management. In some other embodiments, the liquid collecting seat 1, the trapping assembly 2 and the cover 3 can also be made of other materials with good thermal conductivity and strong corrosion resistance, which are not limited in the embodiment.

[0044] Specifically, in the embodiment, the heating assembly is a heating band, which is wound outside the liquid collecting seat 1 and / or the trapping assembly 2. The heating band is a flexible member, which can be wound outside the liquid collecting seat 1 and / or the trapping assembly 2 sufficiently, so as to heat the sample to be filtered sufficiently. The heating band can be adjusted to different temperatures to meet the needs of different temperature filtration. Further, the heating band can be placed on the annular protrusion, which can support the heating band. Further, a fixing structure can be arranged on the annular protrusion, which can fix the heating band and prevent the heating band from being separated from the fractional filtration device. The heating band is a prior art, and the specific type and specification are not limited in the embodiment.

[0045] Specifically, the fractional filtration device is used as follows: firstly, the number of the trapping assemblies 2 is set according to the specific needs of the experiment, and then the fractional filtration device is assembled; then, the sample to be filtered is filled into the fractional filtration device, and the liquid outlet 11 is communicated with the filtration bottle, and the filtration bottle is communicated with the air pump, and then the air pump is started; after the filtration is completed, the material particles of different particle sizes are trapped in the filter screens in the different accommodating cavities, and then the trapping assemblies 2 can be disassembled according to the needs of the experiment, and the material particles can be taken.

[0046] Obviously, the above embodiment of the utility model is only an example for clearly explaining the utility model, and is not a limitation on the embodiments of the utility model. For ordinary skilled in the art, various obvious changes, readjustment and replacement can be made without departing from the protection scope of the utility model. Here, all the embodiments need not and cannot be exhausted. Any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A fractional filtration device, characterized in that, The application relates to a fractional filtration device. The device comprises a liquid collecting base (1) provided with an inlet and an outlet (11), a trapping assembly (2) comprising a containing cavity provided with a filter (23) at one end close to the liquid collecting base (1), the trapping assembly (2) being provided with at least two trapping assemblies (2) connected in series and communicating with the inlet, the filter radius of the filter (23) in different trapping assemblies (2) gradually decreasing from the direction far away from the liquid collecting base (1) to the direction close to the liquid collecting base (1), and a heating assembly provided on the liquid collecting base (1) and / or the trapping assembly (2). The device is further provided with a cover (3) detachably arranged at one end of the trapping assembly (2) far away from the liquid collecting base (1). The trapping assembly (2) comprises an upper connecting part (21) and a lower connecting part (22), the upper connecting part (21) being detachably connected with the lower connecting part (22) of the adjacent trapping assembly (2) or the cover (3), and the lower connecting part (22) being detachably connected with the upper connecting part (21) of the adjacent trapping assembly (2) or the inlet.

2. The fractional filtration device of claim 1, wherein, The liquid collecting base (1) and the trapping assembly (2), the adjacent two trapping assemblies (2) and the trapping assembly (2) and the cover (3) are all socket connections.

3. The fractional filtration device of claim 2, wherein, The liquid collecting base (1) and the trapping assembly (2), the adjacent two trapping assemblies (2) and the trapping assembly (2) and the cover (3) are all provided with limiting parts.

4. The fractional filtration device of claim 3, wherein, The bottom of the cover (3), the upper connecting part (21), the lower connecting part (22) and the outer wall of the inlet are all provided with annular protrusions.

5. The fractional filtration device of claim 4, wherein, The liquid collecting base (1) and the trapping assembly (2), the adjacent two trapping assemblies (2) and the trapping assembly (2) and the cover (3) are all provided with annular sealing rings (4).

6. The fractional filtration device of claim 5, wherein, The liquid collecting base (1), the trapping assembly (2) and the cover (3) are all glass parts.

7. The fractional filtration device of claim 3, wherein, The filter (23) is a filter screen with a mesh number of 10-400.

8. A fractional filtration device according to any one of claims 2-7, characterized in that, The heating assembly is a heating tape wound on the liquid collecting base (1) and / or the trapping assembly (2).

9. A fractional filtration device according to any one of claims 1-7, characterized in that, ​ 10. A fractional filtration device according to any one of claims 1-7, characterized in that, ​

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