Filtering device for extracting soluble dietary fibers

Abstract

The utility model discloses a filtering device for extracting soluble dietary fiber, which comprises a Buchner funnel, the Buchner funnel comprises a filtering cavity, the cavity top of the filtering cavity is communicated to be used as a material injection port, a plurality of micropores for filtering are arranged at the cavity bottom, a suction filtration cup is detachably assembled in the filtering cavity, and the suction filtration cup is provided with a filter cavity. The suction filtration cup comprises filter paper laid along the cavity wall of the filter cavity, a filter shell with a through top is formed after the filter paper is laid along the cavity wall of the filter cavity, and a diatomite layer is laid at the bottom of the filter shell. According to the utility model, the Buchner funnel and the self-made suction filtration cup are matched with each other to extract the dietary fibers, and the diatomite layer is isolated from the micropores for filtration on the Buchner funnel by using the filter shell in the whole extraction process, so that the problem of blockage of the micropores is avoided, and the extraction efficiency is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of dietary fiber extraction, and particularly relates to a filtering device for extracting soluble dietary fiber. BACKGROUND

[0002] With the increase of people's attention to diet health, the research on dietary fiber is favored by scholars. At present, the extraction of dietary fiber mainly refers to the filtration method provided in GB5009.88-2023 "Determination of dietary fiber in food - national food safety standard", that is, a treated crucible is taken, 15mL of 78% ethanol is used to wet and flatten the diatomite, a vacuum filtration device is connected, and the ethanol is removed to make the diatomite on the filter plate. The sample ethanol precipitate is transferred into the crucible for filtration, and a spatula and 78% ethanol are used to transfer all the residues in the flask to the crucible, and the residues are washed with 15mL of 78% ethanol for two times. The filtrate is collected and transferred into a 500mL volumetric flask, and 78% ethanol is used to dilute to the scale, which is used for the determination of SDFS, and the residues are used for the determination of IDF and SDFP. In the whole filtration process, the micropores of the crucible partition plate are directly in contact with the diatomite, which is easy to be blocked by the diatomite, and then the problem of difficulty in filtration occurs, which causes the experiment to be unable to proceed smoothly. SUMMARY

[0003] The utility model provides a filtering device for extracting soluble dietary fiber to solve the above technical problem.

[0004] To achieve the above purpose, the utility model adopts the following technical scheme:

[0005] A filtering device for extracting soluble dietary fiber, comprising a burette, the burette comprising a filter cavity, the cavity top of the filter cavity being through as a material injection port, the cavity bottom having a plurality of micropores for filtration, and a filtration cup being detachably assembled in the filter cavity, the filtration cup comprising filter paper laid along the cavity wall of the filter cavity, the filter paper forming a filter shell with a top opening after being laid along the cavity wall of the filter cavity, and a diatomite layer being laid at the bottom of the filter shell.

[0006] Preferably, the burette further comprises an air extraction pipe through the bottom end of the filter cavity, and the air extraction pipe is connected to an air suction device.

[0007] Preferably, the surface of the filter shell in contact with the cavity bottom of the filter cavity is provided with a geotextile.

[0008] Preferably, the geotextile is elongated towards the direction of the top port of the filter shell to form a protection groove.

[0009] Preferably, the protection groove, the filter shell and the cavity wall of the filter cavity are connected as a whole through a plurality of fixing clamps.

[0010] Preferably, the rim of the filter shell is turned over to form a turned-over groove, and the turned-over groove is sleeved on the rim of the protection groove.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] 1, the utility model discloses a burrel and the self -made suction filter cup are matched with each other to realize the extraction of dietary fiber, and the filter shell is used to isolate the diatomite layer and the micropore for filtering on the burrel in the whole extraction process, thereby avoiding the problem of micropore blockage and guaranteeing the extraction efficiency.

[0013] 2, in the process of accelerating the suction filtration speed through the air suction device, the geotextile is arranged to ensure that the filter shell of the suction filter cup can withstand vacuum pressure without scattering, and the service life is guaranteed. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the cross-sectional structure schematic view of the utility model;

[0015] Figure 2 It is Figure 1 the enlarged structure schematic view of A part in

[0016] The drawing mark is: 1, burrel, 11, filter cavity, 12, suction pipe, 2, suction filter cup, 21, filter shell, 22, diatomite layer, 23, turned-over groove, 3, geotextile, 4, fixed clamp. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantage of the utility model more clearly, the utility model is further explained in detail below by combining with examples and drawings, and the illustrative embodiment and its explanation of the utility model are only used to explain the utility model, and not as the limitation of the utility model.

[0018] Example 1

[0019] As Figure 1 shown in a kind of filter device for extracting soluble dietary fiber, including burrel 1, burrel 1 includes filter cavity 11, the cavity top of filter cavity 11 is through as injection port, cavity bottom has a plurality of micropore for filtering, filter cavity 11 can be detachably equipped with suction filter cup 2, suction filter cup 2 includes filter paper along filter cavity 11 cavity wall laying, when filter paper is laid along filter cavity 11 cavity wall and forms the filter shell 21 of top penetration, the bottom of filter shell 21 is laid with diatomite layer 22, specifically, filter paper has innumerable small holes for liquid particles to pass through, and the solid particles of larger volume cannot pass through, and the filter shell 21 formed using this characteristic can realize the extraction of dietary fiber.

[0020] When extracting dietary fiber, firstly, the suction cup 2 is placed into the filter chamber 11 of the Buchner funnel 1. Then, the filtrate is injected into the filter chamber 11. Under the action of gravity, small molecules in the filtrate pass through the small pores on the filter shell 21, while the dietary fiber molecules are larger and are either adsorbed by the pores of the diatomaceous earth layer or blocked and retained by the small pores on the filter shell 21, thus completing the extraction of dietary fiber. Specifically, the pore size on the filter shell 21 is 10-25 micrometers.

[0021] In this embodiment, a Buchner funnel 1 and a self-made suction cup 2 are used together to extract dietary fiber. During the entire extraction process, the filter shell 21 is used to isolate the diatomaceous earth layer 22 from the micropores on the Buchner funnel 1 used for filtration, thereby avoiding the problem of micropore blockage and ensuring extraction efficiency.

[0022] Example 2

[0023] In some embodiments, the Buchner funnel 1 further includes an air extraction pipe 12 that communicates with the bottom end of the filter chamber 11. The air extraction pipe 12 is connected to the air extraction device. During the extraction of dietary fiber, the air extraction device increases the speed at which small molecules in the filtrate pass through the small holes on the filter shell 21, thereby accelerating the extraction efficiency of dietary fiber.

[0024] In practice, after placing the suction cup 2 into the filter chamber 11 of the Buchner funnel 1, water or solution is added to wet the suction cup 2, so that the filter paper is tightly attached to the wall of the filter chamber 11 to prevent air leakage. Then, the filtrate is injected into the filter chamber 11 and the suction device is activated. Under the action of the suction device, small molecules in the filtrate can quickly pass through the small holes on the filter shell 21, thereby accelerating the extraction speed of dietary fiber.

[0025] Example 3

[0026] During the process of accelerating the extraction of dietary fiber using an air suction device, considering that the filter paper is difficult to resist the suction force of the air suction device and is prone to damage to the filter shell 21, a geotextile 3 is further provided on the surface where the filter shell 21 contacts the bottom of the filter chamber 11. Specifically, the suction force of the air suction device passes through the geotextile 3 and then acts on the filter shell 21. When the filter shell 21 is subjected to suction, it moves in the direction of the suction force. At this time, the flexibility of the geotextile 3 can be used to offset the potential energy of the movement of the filter shell 21, thereby protecting the filter shell 21. Compared with the method of directly contacting the bottom of the filter chamber 11, it is not easy to be damaged. Preferably, the periphery of the geotextile 3 extends towards the top port of the filter shell 21 to form a protective groove, thereby protecting the entire filter shell 21. The protective groove, the filter shell 21, and the cavity wall of the filter chamber 11 are connected into a whole by multiple fixing clips 4 to prevent the protective groove and the side of the filter shell 21 from collapsing.

[0027] In view of the fact that the arrangement of the protection groove will affect the air tightness between the filter shell 21 and the cavity wall of the filtering cavity 11, further, as shown in Figure 2 the edge of the filter shell 21 is turned to form a turned edge groove 23, the turned edge groove 23 is sleeved on the edge of the protection groove, before starting the air suction device, the turned edge groove 23 is also soaked with water or solution, and is tightly attached to the cavity wall of the filtering cavity 11 to achieve the purpose of no air leakage.

[0028] In the embodiment, considering that the obtained residue needs to be sent to a 120-degree oven to be baked to constant weight and then be subjected to dietary fiber determination, in order to ensure that the geotextile 3 can withstand high temperature, the geotextile 3 is selected to be a polytetrafluoroethylene geotextile.

[0029] Of course, the present application can also have other various embodiments, and those skilled in the art can make various corresponding changes and modifications according to the present application without departing from the spirit and essence of the present application, but these corresponding changes and modifications should all belong to the protection scope of the claims attached to the present application.

Claims

1. A filtration device for extracting soluble dietary fiber, comprising a Buchner funnel (1), the Buchner funnel (1) including a filtration chamber (11), the top of the filtration chamber (11) serving as a feed inlet, and the bottom of the chamber having a plurality of micropores for filtration, characterized in that, The filter chamber (11) is detachably equipped with a suction cup (2), which includes filter paper laid along the wall of the filter chamber (11). When the filter paper is laid along the wall of the filter chamber (11), a filter shell (21) with a top through is formed. The bottom of the filter shell (21) is covered with a diatomaceous earth layer (22). The Buchner funnel (1) also includes an air extraction pipe (12) that is connected to the bottom of the filter chamber (11). The air extraction pipe (12) is connected to the air suction device. The surface of the filter shell (21) that contacts the bottom of the filter chamber (11) is covered with geotextile (3).

2. The filtration device for extracting soluble dietary fiber according to claim 1, characterized in that, The periphery of the geotextile (3) extends toward the top port of the filter shell (21) to form a protective groove.

3. The filtration device for extracting soluble dietary fiber according to claim 2, characterized in that, The protective groove, the filter shell (21), and the cavity wall of the filter chamber (11) are connected into a whole by multiple fixing clips (4).

4. The filtration device for extracting soluble dietary fiber according to claim 3, characterized in that, The edge of the filter housing (21) is flanged to form a flanged groove (23), and the flanged groove (23) is fitted onto the edge of the protective groove.

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