Filtering funnel

Abstract

The utility model relates to the technical field of filtering equipment, in particular to a filtering funnel. Comprising an inner filtering layer and an outer drainage layer, the inner filtering layer and the outer drainage layer are of an integrated structure, and a negative pressure cavity is formed between the inner filtering layer and the outer drainage layer. A plurality of filtering holes are circumferentially formed in the side wall of the inner filtering layer. According to the filter funnel, the structure of the existing filter funnel is improved, and in the specific filtering process, the gravity of filtrate in the filtering process is dispersed through the arrangement of the filter holes in the side wall of the inner filter layer, so that the breakage of filter paper is greatly reduced. Moreover, through the structural arrangement that the negative pressure cavity is formed between the outer drainage layer and the inner filtering layer, the filtering speed is greatly increased, and the overall working efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of filter materials, in particular to a filter funnel. Background Art

[0002] Filtration is the most commonly used method of separating solution from precipitate. When the mixture of solution and precipitate passes through a filter (such as filter paper), the precipitate remains on the filter, and the solution flows through the filter into a receiving container. Filtration in the traditional sense refers to the use of porous media to intercept solid particles in a suspension, thereby separating solids from liquids. In the filtration process, the most important equipment is the filter funnel and filter paper. The synergistic effect of the filter funnel and filter paper can ensure a good and accurate filtration effect.

[0003] However, in actual filtering operations, it was found that the existing filter funnel has a leakage hole at the bottom. When the filtering solution is large, the filtration time will be relatively long. During the filtration process, due to the effect of gravity and the influence of the negative pressure of the filtration, the filter paper often breaks, which seriously affects the accuracy of the filtration and the work efficiency.

[0004] Therefore, there is an urgent need to improve the structure of the existing filter funnel to improve the accuracy of the filtration process and improve work efficiency. Summary of the invention

[0005] In order to solve the deficiencies in the prior art, the utility model provides a filtering funnel.

[0006] The technical solution of the utility model is:

[0007] A filter funnel comprises an inner filter layer and an outer drainage layer, wherein the inner filter layer and the outer drainage layer are set as an integral structure and a negative pressure cavity is set between the inner filter layer and the outer drainage layer. A plurality of filter holes are circumferentially set on the side wall of the inner filter layer.

[0008] Furthermore, the top of the inner filter layer extends outward horizontally and is fixedly connected to the top of the outer drainage layer.

[0009] Furthermore, the inner filter layer is configured as an inverted frustum-shaped structure.

[0010] Furthermore, the outer drainage layer includes a drainage cover and a drainage tube, and the drainage cover is configured as an inverted frustum-shaped structure and is fixedly connected to the drainage tube.

[0011] Furthermore, the drainage tube includes a first drainage tube and a second drainage tube, the first drainage tube is connected to the second drainage tube, the inner diameter of the first drainage tube is the same as the inner diameter of the second drainage tube, and the outer diameter of the first drainage tube is greater than the outer diameter of the second drainage tube.

[0012] Furthermore, the filter holes are spaced apart from the top of the inner filter layer and the bottom of the inner filter layer.

[0013] Furthermore, the pore size of the filter hole is set to 0.5-2 mm.

[0014] The beneficial effects achieved by the utility model are:

[0015] The utility model improves the existing filter funnel structure. In the specific filtering process, the gravity of the filtrate in the filtering process is dispersed by setting the filter holes on the side wall of the inner filter layer, which greatly reduces the breakage of the filter paper. In addition, by setting the negative pressure cavity between the outer drainage layer and the inner filter layer, the negative pressure suction filtration is used to greatly improve the filtering speed. Compared with the existing traditional funnel filtration, the filtration speed of the filter funnel of the utility model can be increased by at least 5 times, which greatly improves the overall work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the utility model.

[0017] Figure 2 It is a schematic cross-sectional structure diagram of Example 1 of the utility model.

[0018] Figure 3 It is a schematic diagram of the overall structure of Example 2 of the utility model.

[0019] Figure 4 It is a schematic cross-sectional structure diagram of embodiment 2 of the present utility model.

[0020] In the figure, 1, inner filter layer; 2, negative pressure chamber; 3, outer drainage layer; 4, filter hole; 5, drainage cover; 6, first drainage tube; 7, second drainage tube. DETAILED DESCRIPTION

[0021] To facilitate those skilled in the art to understand the present invention, specific implementations of the present invention are described below with reference to the accompanying drawings.

[0022] Example 1

[0023] like Figures 1-2 As shown, the utility model provides a filter funnel, including an inner filter layer 1 and an outer drainage layer 3. The inner filter layer 1 is configured as an inverted frustum-shaped structure. The outer drainage layer 3 includes a drainage cover 5 and a drainage tube, and the drainage cover 5 is configured as an inverted frustum-shaped structure and is fixedly connected to the drainage tube. The inner filter layer 1 and the outer drainage layer 3 are configured as an integral structure, and a negative pressure chamber 2 is provided between the inner filter layer 1 and the outer drainage layer 3. Specifically, the top of the inner filter layer 1 extends horizontally outward and is fixedly connected to the top of the outer drainage layer 3. The outer walls of the inner filter layer 1 and the drainage cover 5 are spaced apart to form a negative pressure chamber 2.

[0024] A plurality of filter holes 4 are circumferentially arranged on the side wall of the inner filter layer 1. The filter holes 4 are arranged at a distance from the top of the inner filter layer 1 and the bottom of the inner filter layer 1. The aperture of the filter holes 4 is set to 1 mm.

[0025] In the specific use process, the filter paper is attached to the side wall of the inner filter layer 1. When the solution passes through the filter paper and enters the outer drainage layer 3, the setting of the filter hole 4 on the inner filter layer 1 greatly disperses the influence of the gravity of the filtrate on a specific position of the filter paper, and disperses the gravity, which greatly reduces the rupture of the filter paper. In addition, the negative pressure environment formed by the negative pressure chamber 2 greatly improves the filtration speed by using negative pressure suction filtration. Compared with the existing traditional funnel filtration, the filtration speed of the filter funnel of the utility model can be increased by at least 5 times, which greatly improves the filtration speed and greatly improves the overall work efficiency.

[0026] Example 2

[0027] This embodiment is based on the embodiment 1. Figure 3 and 4 As shown, the drainage tube includes a first drainage tube 6 and a second drainage tube 7, and the first drainage tube 6 is connected to the second drainage tube 7. The inner diameter of the first drainage tube 6 is the same as the inner diameter of the second drainage tube 7, and the outer diameter of the first drainage tube 6 is larger than the outer diameter of the second drainage tube 7. The above-mentioned structure is convenient for connecting the drainage tube with subsequent pipe fittings.

[0028] The above-described implementation methods of the utility model do not constitute a limitation on the protection scope of the utility model. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model shall be included in the protection scope of the claims of the utility model.

Claims

1. A filter funnel, characterized in that: The invention comprises an inner filter layer (1) and an outer drainage layer (3), wherein the inner filter layer (1) and the outer drainage layer (3) are arranged as an integral structure and a negative pressure cavity (2) is arranged between the inner filter layer (1) and the outer drainage layer (3); and a plurality of filter holes (4) are circumferentially arranged on the side wall of the inner filter layer (1).

2. A filter funnel according to claim 1, characterized in that: The top of the inner filter layer (1) extends outward horizontally and is fixedly connected to the top of the outer drainage layer (3).

3. A filter funnel according to claim 1 or 2, characterized in that: The inner filter layer (1) is configured as an inverted frustum-shaped structure.

4. A filter funnel according to claim 1 or 2, characterized in that: The outer drainage layer (3) comprises a drainage cover (5) and a drainage tube. The drainage cover (5) is configured as an inverted frustum-shaped structure and is fixedly connected to the drainage tube.

5. A filter funnel according to claim 4, characterized in that: The drainage tube comprises a first drainage tube (6) and a second drainage tube (7); the first drainage tube (6) is connected to the second drainage tube (7); the inner diameter of the first drainage tube (6) is the same as the inner diameter of the second drainage tube (7), and the outer diameter of the first drainage tube (6) is greater than the outer diameter of the second drainage tube (7).

6. A filter funnel according to claim 1, characterized in that: The filter hole (4) is arranged at a distance from the top of the inner filter layer (1) and the bottom of the inner filter layer (1).

7. A filter funnel according to claim 1 or 6, characterized in that: The pore diameter of the filtering hole (4) is set to 0.5-2 mm.

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