Laboratory sample combined filtration device

Abstract

The utility model discloses a laboratory sample combined filtering device which comprises a Buchner funnel and a sand core suction filter which are distributed up and down. According to the utility model, the ceramic Buchner funnel and the sand core suction filter are integrated in one device, so that the integrated operation of rough filtration and fine filtration is realized, the experimental process is simplified, and the operation efficiency is improved; the integrated device reduces the dependence of a laboratory on a plurality of independent filtering devices, and reduces the equipment purchase and maintenance cost; the filtering process is completed in the same device, so that the loss and pollution risk of the sample in the transfer process are reduced, and the reliability of an experimental result is improved; the device can flexibly adjust the filtration precision of rough filtration and fine filtration according to the requirements of different samples, and is suitable for various experimental scenes.

Description

TECHNICAL FIELD

[0001] The utility model relates to a filter device, concretely to a laboratory sample combined filter device belongs to liquor filtering technical field. BACKGROUND

[0002] In the liquor body design process, sample filtration is crucial to ensure liquor quality and taste. The company currently uses a ceramic Buchner funnel filtration device and a microporous filter membrane filtration device. The two filtration devices are manually switched, which is low in efficiency.

[0003] In the prior art, a rapid filter device for a laboratory disclosed in publication No. CN105233548A includes a vacuum filtration device, a parallel mechanism, and multiple filters. The multiple filters are connected in parallel through the parallel mechanism, allowing simultaneous vacuum filtration of multiple samples, thereby greatly reducing operation time and improving filtration efficiency. The device can be used for sediment filtration and separation and solid-liquid separation of slurry in a laboratory. However, some existing filtration devices have drawbacks in terms of filter membrane switching convenience and separation operation complexity. 1) In the traditional sample solution filtration process, different devices are usually required for coarse filtration and fine filtration, resulting in complex operation steps and long time consumption. 2) High equipment cost: The need to purchase and maintain coarse filtration and fine filtration devices increases the equipment cost and management difficulty of the laboratory. 3) Sample loss risk: During multiple transfers and operations, sample solutions are easily contaminated or lost, affecting the accuracy of experimental results. SUMMARY

[0004] The laboratory sample combined filter device provided by the utility model solves at least one of the above technical problems. The device simultaneously performs vacuum filtration, which accelerates the filtration speed by utilizing a negative pressure environment. The device has significant advantages in liquor sample filtration. On the one hand, it retains trace components well, maintaining the original flavor characteristics of liquor. On the other hand, it simultaneously performs coarse filtration and fine filtration of liquor samples, reducing filtration time and manual switching workload.

[0005] The laboratory sample combined filter device comprises a Buchner funnel and a sand core filtration device. The Buchner funnel and the sand core filtration device are arranged in an up-down distribution. A sealed connection pipe is connected between the Buchner funnel and the sand core filtration device. A conical liquid collecting bottle is connected to the lower part of the sand core filtration device.

[0006] A coarse filter membrane is movably arranged in the Buchner funnel. A microporous filter membrane is movably arranged in the sand core filtration device. A ground glass assembly is arranged at the joint between the Buchner funnel, the sealed connection pipe, the sand core filtration device, and the conical liquid collecting bottle. Negative pressure suction assemblies are arranged on one side of the Buchner funnel and the sand core filtration device.

[0007] As a further scheme of the utility model: the Buchner funnel is fixedly connected with a coarse filter support, and the coarse filter membrane is placed on the coarse filter support.

[0008] As a further scheme of the utility model: the sand core filter is fixedly connected with a sand core filter plate, and the microporous filter membrane is placed on the sand core filter plate.

[0009] As a further scheme of the utility model: the middle small diameter part of the sand core filter is connected with a filtrate dropping tube, the filtrate dropping tube is inserted into the conical liquid collecting bottle, and the bottom end of the filtrate dropping tube is lower than the installation position of the negative pressure suction assembly connected with the sand core filter.

[0010] As a further scheme of the utility model: the negative pressure suction assembly comprises a spiral nozzle negative pressure interface and a spiral sealing cap, the spiral nozzle negative pressure interface is communicated with one side of the Buchner funnel and the sand core filter respectively, the port part of the spiral nozzle negative pressure interface is connected with the spiral sealing cap, and the port part of the spiral nozzle negative pressure interface is communicated with an external vacuum system in working.

[0011] As a further scheme of the utility model: the grinding assembly comprises an outer grinding ring and an inner grinding ring, the outer grinding ring is arranged at the bottom end of the Buchner funnel, the bottom end of the sealing connection pipe and the upper end of the conical liquid collecting bottle, and the inner grinding ring is arranged at the upper end of the sealing connection pipe and the upper and lower ends of the sand core filter.

[0012] The utility model discloses the beneficial effects are: the utility model discloses the ceramic Buchner funnel and sand core filter are integrated in one device, realize the integration operation of coarse filter and fine filter, simplify the experiment process, improve the operation efficiency, the joint device reduces the dependence of laboratory to multiple independent filtering devices, reduces the equipment purchase and maintenance cost, because the filtration process is completed in the same device, reduces the loss and pollution risk of sample in the transfer process, improves the reliability of experimental result, the device can be adjusted according to the demand of different samples, the filtration precision of coarse filter and fine filter is flexible, is suitable for multiple experimental scenes. ACCURACY

[0013] Figure 1 It is whole structure schematic diagram of the utility model;

[0014] Figure 2 It is split structure schematic diagram of the utility model;

[0015] Figure 3 It is the cross section structure schematic diagram of the utility model Buchner funnel;

[0016] Figure 4 It is the cross section structure schematic diagram of the utility model sealing connection pipe;

[0017] Figure 5This is a schematic diagram of the cross-sectional structure of the sand core filter of this utility model.

[0018] In the diagram: 1. Buchner funnel; 11. Coarse filter support frame; 12. Coarse filter membrane; 2. Sealing connection pipe; 3. Sand core filter; 31. Sand core filter plate; 32. Microporous filter membrane; 33. Filtrate dropper; 4. Conical collection bottle; 5. Spiral nozzle negative pressure interface; 51. Spiral sealing cap; 6. Outer frosted ring; 7. Inner frosted ring. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Example 1, as Figures 1 to 5 As shown, a laboratory sample filtration device includes a Buchner funnel 1 and a sand core filter 3. The Buchner funnel 1 and the sand core filter 3 are arranged vertically. A sealing connecting pipe 2 connects the Buchner funnel 1 and the sand core filter 3. A conical collection bottle 4 is connected to the bottom of the sand core filter 3. Through an integrated structural design, the Buchner funnel 1 and the sand core filter 3 are integrated together, realizing the simultaneous coarse filtration and fine filtration. The filtered laboratory sample can be collected by the conical collection bottle 4.

[0021] A coarse filter membrane 12 is movably installed inside the Buchner funnel 1, and a microporous filter membrane 32 is movably installed inside the sand core filter 3. A frosted assembly is installed at the joint between the Buchner funnel 1, the sealing connecting pipe 2, the sand core filter 3, and the conical collecting bottle 4. A negative pressure suction assembly is installed on one side of both the Buchner funnel 1 and the sand core filter 3. The coarse filter membrane 12 and the microporous filter membrane 32 are used for easy cleaning and replacement, and can be replaced according to experimental needs to adapt to the filtration accuracy requirements of different samples. The frosted assembly at the joint ensures the sealing of the joint, so as to ensure the airtightness of the connection during negative pressure suction filtration, and provide a stable and efficient negative pressure environment for the filtration process. At the same time, since both the Buchner funnel 1 and the sand core filter 3 are equipped with negative pressure suction assemblies, they can be connected to a vacuum system individually, in series, or in parallel as needed to meet different filtration requirements.

[0022] In addition to comprising all the technical features in embodiment one, embodiment two further comprises: the Buchner funnel 1 is fixedly connected with a coarse filtration support frame 11, and the coarse filtration filter membrane 12 is placed on the coarse filtration support frame 11, and the coarse filtration support frame 11 can support the coarse filtration filter membrane 12, so that the coarse filtration filter membrane 12 can be placed in the Buchner funnel 1 in a suspended manner, to realize coarse filtration of the laboratory sample, and facilitate taking and placing the coarse filtration filter membrane 12.

[0023] The sand core filter 3 is fixedly connected with a sand core filter plate 31, and the microporous filter membrane 32 is placed on the sand core filter plate 31, and the sand core filter plate 31 can support the microporous filter membrane 32, so that the microporous filter membrane 32 can be placed in the sand core filter 3 in a suspended manner, to realize fine filtration of the laboratory sample, and facilitate taking and placing the microporous filter membrane 32.

[0024] The middle small-diameter part of the sand core filter 3 is connected with a filtrate dropping tube 33, and the filtrate dropping tube 33 is inserted into the conical liquid collecting bottle 4, and the bottom end of the filtrate dropping tube 33 is lower than the installation position of the negative pressure suction assembly connected with the sand core filter 3, and the filtrate dropping tube 33 can guide the filtered sample solution to the bottom of the conical liquid collecting bottle 4 to drop, so as to prevent the filtered sample solution from being sucked out by the negative pressure suction assembly during collection.

[0025] In addition to comprising all the technical features in embodiment one, embodiment three further comprises: the negative pressure suction assembly comprises a spiral nozzle negative pressure interface 5 and a spiral sealing cap 51, the spiral nozzle negative pressure interface 5 is respectively communicated with the Buchner funnel 1 and one side of the sand core filter 3, and the port part of the spiral nozzle negative pressure interface 5 is connected with the spiral sealing cap 51, and the port part of the spiral nozzle negative pressure interface 5 is communicated with the external vacuum system during work, so as to realize negative pressure control of the whole device through the spiral nozzle negative pressure interface 5 in a single, series or parallel manner, to simplify the operation process, and for the interface part not communicated with the external vacuum system, the spiral sealing cap 51 is arranged for sealing treatment, to ensure the stability of the negative pressure environment in the device during filtration.

[0026] The sanding assembly comprises an outer sanding ring 6 and an inner sanding ring 7, the outer sanding ring 6 is arranged at the bottom end of the Buchner funnel 1, the bottom end of the sealing connection pipe 2 and the upper end of the conical liquid collecting bottle 4, and the inner sanding ring 7 is arranged at the upper and lower ends of the sealing connection pipe 2 and the sand core filter 3, so that each interface part is connected by the outer sanding ring 6 and the inner sanding ring 7, to ensure the airtightness of each interface part, and also facilitate disassembly and cleaning of each interface part.

[0027] The Buchner funnel 1 is fixed with the sand core suction filter 3 through the sealing connecting pipe 2, the connection is ensured to be sealed well, the coarse filter membrane 12 is placed in the Buchner funnel 1, and the microporous filter membrane 32 is placed in the sand core suction filter 3. The negative pressure interface of the Buchner funnel 1 and the sand core suction filter 3 is connected to a vacuum pump, a negative pressure switch is opened, and a negative pressure environment is formed. The sample solution to be filtered is poured into the Buchner funnel 1, coarse filtration is carried out under negative pressure, and larger particles are intercepted by the coarse filter membrane 12; the liquid after coarse filtration flows into the sand core suction filter 3, and fine filtration is carried out through the microporous filter membrane 32 and the sand core filter plate 31 under the action of negative pressure, and small particles are intercepted. The liquid after filtration flows out from the liquid outlet, and the whole filtration process is completed. After filtration is completed, the negative pressure system is closed, the device is disassembled, and each part is cleaned.

[0028] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting in any aspect, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended to encompass all changes falling within the meaning and scope of the equivalent elements of the claims. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0029] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, and those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be properly combined to form other embodiments that those skilled in the art can understand.

Claims

1. A laboratory sample combined filtration device comprising a Buchner funnel (1) and a sand core suction filter (3), characterized in that: The Buchner funnel (1) and the sand core suction filter (3) are arranged in an up-down distribution, a sealing connection pipe (2) is connected between the Buchner funnel (1) and the sand core suction filter (3), and a conical liquid collecting bottle (4) is communicated below the sand core suction filter (3); A coarse filter membrane (12) is movably arranged in the Buchner funnel (1), a microporous filter membrane (32) is movably arranged in the sand core suction filter (3), and a ground glass assembly is arranged at the butt joint parts between the Buchner funnel (1), the sealing connection pipe (2), the sand core suction filter (3) and the conical liquid collecting bottle (4), and the Buchner funnel (1) and the sand core suction filter (3) are each provided with a negative pressure suction assembly on one side.

2. A laboratory sample union filter device according to claim 1, characterized in that: The Buchner funnel (1) is fixedly connected with a coarse filter support frame (11), and the coarse filter membrane (12) is arranged on the coarse filter support frame (11).

3. A laboratory sample union filter device according to claim 1, characterized in that: The sand core suction filter (3) is fixedly connected with a sand core filter plate (31), and the microporous filter membrane (32) is arranged on the sand core filter plate (31).

4. A laboratory sample union filter device according to claim 3, wherein: A filtrate dropping tube (33) is connected to the middle small-diameter part of the sand core suction filter (3), the filtrate dropping tube (33) is inserted into the conical liquid collecting bottle (4), and the bottom end of the filtrate dropping tube (33) is lower than the installation position of the negative pressure suction assembly connected to the sand core suction filter (3).

5. The laboratory sample union filter device of claim 1, wherein: The negative pressure suction assembly comprises a spiral nozzle negative pressure interface (5) and a spiral sealing cap (51), the spiral nozzle negative pressure interface (5) is respectively communicated on one side of the Buchner funnel (1) and the sand core suction filter (3), the port part of the spiral nozzle negative pressure interface (5) is connected with the spiral sealing cap (51), and the port part of the spiral nozzle negative pressure interface (5) is communicated with an external vacuum system in working.

6. A laboratory sample union filter device according to claim 1 or 5, characterized in that: The ground glass assembly comprises an outer ground glass ring (6) and an inner ground glass ring (7), the outer ground glass ring (6) is arranged at the bottom end of the Buchner funnel (1), the bottom end of the sealing connection pipe (2) and the upper end of the conical liquid collecting bottle (4), and the inner ground glass ring (7) is arranged at the upper end of the sealing connection pipe (2) and the upper and lower ends of the sand core suction filter (3).

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