Suction filtration funnel

Abstract

The utility model discloses a suction filtration funnel, which relates to the technical field of experimental equipment and comprises a funnel body, the funnel body comprises a filter tube, a conical tube and a drainage tube, the filter tube comprises a conical section and a cylindrical section, the aperture of the top of the conical section is larger than that of the bottom of the conical section, and the opposite side walls of the conical section are provided with symmetrically arranged chutes; an annular groove communicated with the bottom end of the sliding groove is formed in the inner side wall of the top end of the cylindrical section; the distance between the top ends of the sliding grooves and the bottom end of the cylindrical section is larger than or equal to the radius of the filtering plate, a plurality of through filtering holes are formed in the filtering plate, the top hole diameter and the bottom hole diameter of the filtering holes are different, the edge of the filtering plate abuts against the annular groove, a supporting rod is fixed to the center line of the filtering plate, and the two ends of the supporting rod extend into the two sliding grooves respectively. According to the filter plate, the switching of two different filter hole diameters can be realized, the filtering of samples with different particle sizes can be met, and the optimal filtering effect can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of experimental equipment, and more specifically to a suction filtration funnel. Background Art

[0002] The filtration funnel is a common experimental device. The filtration funnel used in the prior art is usually made of ceramic or glass, with a filter hole of fixed aperture so that the liquid and solid can be separated under negative pressure during the filtration process. Another common practice is to place filter paper on the surface of the filter hole and then perform filtration. In the mixed solid-liquid sample, the solid is left on the surface of the filter paper and the liquid is collected in the filtration bottle. Another common filtration funnel has a filter hole made of the same material as the funnel so that it can be integrally formed. However, the filter aperture of this funnel is single and can only filter samples of one particle size.

[0003] During the experiment, the particle sizes of different types of samples are also different. Using only a filter with a single pore size often cannot achieve the best filtration effect. For example, if the particle size is large, using a funnel with a smaller pore size will result in a longer filtration time and lower efficiency. If the particle size is small, using a funnel with a larger pore size will not achieve the filtration effect.

[0004] Therefore, how to provide a filtration funnel with a simple structure, which can provide selectivity when filtering samples with different particle sizes and improve the filtration effect, is a problem that technical personnel in this field urgently need to solve. Utility Model Content

[0005] In view of this, the utility model provides a suction filtration funnel, aiming to solve the above technical problems.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A suction filtration funnel comprises a funnel body, wherein the funnel body comprises a filter tube, a conical tube and a drainage tube which are sequentially connected from top to bottom, wherein the filter tube comprises an integrally formed conical section and a cylindrical section, wherein the top diameter of the conical section is larger than the bottom diameter, and symmetrically arranged slide grooves are provided on the opposite side walls thereof; an annular groove is provided on the inner side wall of the top end of the cylindrical section, and the bottom ends of the two slide grooves are both connected to the annular groove, and further comprises:

[0008] Filter plate; the filter plate is a circular plate, the distance from the top of the slide groove to the bottom of the cylindrical section is greater than or equal to the radius of the filter plate; a plurality of through filter holes are provided on the filter plate, the top aperture and the bottom aperture of the filter holes are different, the edge of the filter plate abuts against the annular groove, a support rod is fixed on the center line of the filter plate, the two ends of the support rod respectively extend into the two symmetrically arranged slide grooves, the support rod can drive the filter plate to move up and down in the vertical direction along the slide groove and realize flipping.

[0009] Through the above technical scheme, the utility model provides a suction filtration funnel, the filter tube includes an integrally formed conical section and a cylindrical section, and the distance from the top of the slide groove to the bottom of the cylindrical section is greater than or equal to the radius of the filter plate. This structural setting can realize that the support rod drives the filter plate to move up and down in the vertical direction along the slide groove, which is convenient for flipping the filter plate. The filter hole of the filter plate is a conical structure to meet the needs of samples with different particle sizes when filtering. When the top surface or the bottom surface of the filter plate is facing up, the switching of two different filter hole apertures can be realized, thereby achieving the best filtering effect. The utility model has a simple structure and is easy to operate. It only needs to drive the filter plate to move upward along the slide groove by the support rod. When it reaches the upper part of the conical section, the filter plate is flipped and the filter surface with the appropriate aperture is selected to face up.

[0010] Preferably, in the above-mentioned filtration funnel, an arc groove connected to the annular groove is provided around the bottom of the conical section, and the diameter of the bottom end of the arc groove close to one end of the annular groove is greater than or equal to the diameter of the top end of the arc groove. The connection between the arc groove and the annular groove makes it easier for the filter plate to move upward.

[0011] Preferably, in the above-mentioned filtration funnel, the top diameter of the conical tube is larger than the bottom diameter, the top diameter of the conical tube is smaller than the diameter of the cylindrical section, and the bottom diameter is the same as the diameter of the drainage tube.

[0012] Preferably, in the above-mentioned filtration funnel, the bottom opening of the drainage tube is an oblique incision structure.

[0013] Preferably, in the above-mentioned filtration funnel, the top aperture of the filter hole is smaller than the bottom aperture. The top aperture of the filter plate filter hole is different from the bottom aperture, and a better and more suitable filter hole aperture can be selected for filtering according to different particle sizes to achieve the best filtering effect.

[0014] Preferably, in the above-mentioned suction filtration funnel, the filter plate can be folded in half along the support rod, so as to facilitate the flipping of the filter plate.

[0015] It can be seen from the above technical solution that, compared with the prior art, the utility model discloses a suction filtration funnel, which has the following beneficial effects:

[0016] 1. The utility model has a simple structure and is easy to operate.

[0017] 2. The utility model can drive the filter plate to move up and down in the vertical direction along the slide groove through the support rod, and when it moves to the position above the cone section, the filter plate can be flipped to select filter holes of different apertures for filtering according to samples of different particle sizes, thereby ensuring the best filtering effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0019] Figure 1 The accompanying drawing is a schematic diagram of the structure of the suction filtration funnel provided by the utility model;

[0020] Figure 2 The attached picture is Figure 1 a sectional view of the accompanying drawing;

[0021] Figure 3 The accompanying drawing is a schematic diagram of the filter plate flipping process provided by the utility model.

[0022] in:

[0023] 1- Filter tube;

[0024] 11-conical segment; 12-cylindrical segment;

[0025] 2-conical tube;

[0026] 3-Drainage tube;

[0027] 4-chute;

[0028] 5- annular groove;

[0029] 6- filter plate;

[0030] 61-filter hole;

[0031] 7-Support rod

[0032] 8- Arc groove. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] See attached Figure 1 To Attachment Figure 2The utility model discloses a suction filtration funnel, including a funnel body including a filter tube 1, a conical tube 2 and a drainage tube 3 which are sequentially connected from top to bottom, the filter tube 1 includes an integrally formed conical section 11 and a cylindrical section 12, the top diameter of the conical section 11 is larger than the bottom diameter, and symmetrically arranged slide grooves 4 are provided on the opposite side walls thereof, an annular groove 5 is provided on the inner side wall of the top end of the cylindrical section 12, and the bottom ends of the two slide grooves 4 are both connected to the annular groove 5, and also includes:

[0035] The filter plate 6 is a circular plate, and the distance from the top of the slide groove 4 to the bottom of the cylindrical section 12 is greater than or equal to the radius of the filter plate 6; a plurality of through filter holes 61 are provided on the filter plate 6, and the top aperture and the bottom aperture of the filter hole 61 are different. The edge of the filter plate 6 abuts against the annular groove 5, and a support rod 7 is fixed on the center line of the filter plate 6, and the two ends of the support rod 7 extend into two symmetrically arranged slide grooves 4 respectively. The support rod 7 can drive the filter plate 6 to move up and down in the vertical direction along the slide groove 4 and realize flipping.

[0036] In order to further optimize the above technical solution, an arc groove 8 connected to the annular groove 5 is provided around the bottom of the conical section 11, and the diameter of the bottom end of the arc groove 8 close to one end of the annular groove 5 is greater than or equal to the diameter of the top end of the arc groove 8.

[0037] In order to further optimize the above technical solution, the top diameter of the conical tube 2 is larger than the bottom diameter, the top diameter of the conical tube 2 is smaller than the diameter of the cylindrical section 12 , and the bottom diameter is the same as the diameter of the drainage tube 3 .

[0038] In order to further optimize the above technical solution, the bottom opening of the drainage tube 3 is an oblique incision structure.

[0039] In order to further optimize the above technical solution, the top diameter of the filter hole 61 is smaller than the bottom diameter.

[0040] In order to further optimize the above technical solution, the cross-section of the filter hole 61 is a conical structure, a T-shaped structure, an inverted T-shaped structure, a trapezoidal structure or other shapes, and the top aperture of the filter hole 61 is different from the bottom aperture.

[0041] In order to further optimize the above technical solution, the filter plate 6 can be folded in half along the support rod 7 .

[0042] The filter plate 6 can be a circular plate folded in half along its center line, and the two semicircular plates are hinged to the support rod 7, such as Figure 3 As shown, a schematic diagram of the flipping process when the filter plate 6 is a circular plate that can be folded along its center line, specifically: flip the two semicircular plates upward to form an angle with the support rod 7, then move upward along the slide groove 4 to the top of the slide groove 4, continue to flip the two semicircular plates, and finally realize the flipping of the filter hole 61 of the filter plate 6. Of course, its flipping process is not limited to the process shown in the figure, and adaptive adjustments can also be made to complete the flipping of the filter plate 4.

[0043] The filter plate 6 can also be an integral circular plate with a support rod 7 fixed at its center line. The filter plate 6 can be flipped by moving upward along the slide groove 4 to the top 4 end of the slide groove directly through the support rod 7, and then moving downward along the slide groove 4 to place the filter plate 6 in the annular groove 5.

[0044] In order to further optimize the above technical solution, the number of filter plates 6 can be multiple, and the pore size of the filter holes 61 of each filter plate 6 is different. The most suitable filter plate 6 can be selected and replaced according to samples of different particle sizes to achieve the best filtering effect.

[0045] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0046] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A suction filtration funnel, comprising a funnel body, wherein the funnel body comprises a filter tube (1), a conical tube (2) and a drainage tube (3) which are sequentially connected from top to bottom, characterized in that: The filter tube (1) comprises an integrally formed conical section (11) and a cylindrical section (12); the top diameter of the conical section (11) is larger than the bottom diameter, and symmetrically arranged slide grooves (4) are provided on opposite side walls thereof; an annular groove (5) is provided on the inner side wall of the top end of the cylindrical section (12), and the bottom ends of the two slide grooves (4) are both connected to the annular groove (5); and further comprises: A filter plate (6); the filter plate (6) is a circular plate, the distance from the top of the slide groove (4) to the bottom of the cylindrical section (12) is greater than or equal to the radius of the filter plate (6); a plurality of through filter holes (61) are provided on the filter plate (6), the top aperture and the bottom aperture of the filter holes (61) are different, the edge of the filter plate (6) abuts against the annular groove (5), a support rod (7) is fixed on the center line of the filter plate (6), the two ends of the support rod (7) respectively extend into the two symmetrically arranged slide grooves (4), and the support rod (7) can drive the filter plate (6) to move up and down in the vertical direction along the slide groove (4) and realize flipping.

2. A suction filtration funnel according to claim 1, characterized in that: An arcuate groove (8) communicating with the annular groove (5) is provided around the bottom of the conical section (11), and the diameter of the bottom end of the arcuate groove (8) close to one end of the annular groove (5) is greater than or equal to the diameter of the top end of the arcuate groove (8).

3. A suction filtration funnel according to claim 2, characterized in that: The top diameter of the conical tube (2) is larger than the bottom diameter, the top diameter of the conical tube (2) is smaller than the diameter of the cylindrical section (12), and the bottom diameter is the same as the diameter of the drainage tube (3).

4. A suction filtration funnel according to claim 3, characterized in that: The bottom opening of the drainage tube (3) is an oblique incision structure.

5. A suction filtration funnel according to claim 1, characterized in that: The top diameter of the filter hole (61) is smaller than the bottom diameter.

6. A suction filtration funnel according to claim 1, characterized in that: The filter plate (6) can be folded in half along the support rod (7).

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