Vacuum negative pressure suction filtration funnel

Abstract

The utility model discloses a vacuum negative-pressure suction filtration funnel, and relates to the technical field of chemical equipment. The device comprises a funnel, an arc-shaped intaglio plate is fixedly installed in the funnel, a flow guide pipe is fixedly installed and communicated with the bottom end of the arc-shaped intaglio plate, a vacuum exhaust pipe is fixedly installed and communicated with the side end of the funnel, and a first filter plate and a second filter plate are installed in the funnel in a sliding mode. The first filter plate is located above the second filter plate, the second filter plate is located above the arc-shaped intaglio plate, and the joint of the funnel and the vacuum exhaust pipe is located below the arc-shaped intaglio plate, so that integrated air exhaust can be carried out on the interior of the container and the interior of the funnel; the vacuum negative-pressure suction filtration effect can be achieved without using a special suction filtration bottle, and meanwhile, the first filter plate and the second filter plate are used for protection when filter paper is broken, so that cross contamination and separation failure are avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical equipment, in particular to a vacuum negative pressure filtration funnel. Background Art

[0002] The vacuum filtration funnel is a conventional experimental instrument for rapid separation of solids and liquids in chemical and pharmaceutical experiments. It uses the negative pressure caused by vacuum to accelerate water filtration. The filtration bottle is connected to the vacuum pump, and the funnel is placed on the mouth of the filtration bottle for filtration. At this time, the vacuum pump starts to evacuate air to reduce the air pressure in the filtration bottle. If there is any solution in the filter cloth on the funnel, under the action of atmospheric pressure and gravity, these solutions will flow through the filter cloth into the filtration bottle, and the remaining solids will remain on the filter paper, thereby achieving the purpose of filtration.

[0003] However, the existing vacuum filtration funnel needs to be used with a special filtration bottle and cannot be used in an ordinary container bottle. In addition, when the vacuum filtration funnel is in use, the vacuum area will have a certain suction force on the filter paper, which may cause the filter paper to be broken, resulting in cross-contamination between materials and separation failure. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a vacuum negative pressure filtration funnel which can overcome the above problems or at least partially solve the above problems.

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the utility model is: a vacuum negative pressure filtration funnel, including a funnel, an arc-shaped concave plate is fixedly installed in the funnel, the bottom end of the arc-shaped concave plate is fixedly installed and connected to a guide tube, the side end of the funnel is fixedly installed and connected to a vacuum suction pipe, a first filter plate and a second filter plate are slidably installed in the funnel, the first filter plate is located above the second filter plate, the second filter plate is located above the arc-shaped concave plate, and the connection between the funnel and the vacuum suction pipe is located below the arc-shaped concave plate.

[0006] In order to facilitate the disassembly of the first filter plate and the second filter plate, preferably, a fixed connecting rod is fixedly installed on the bottom surface of the first filter plate, and the fixed connecting rod is fixedly connected to the second filter plate.

[0007] In order to prevent impurities from passing through the second filter plate and entering the container, further, the aperture of the filter slot on the first filter plate is larger than the aperture of the filter slot on the second filter plate.

[0008] In order to limit and fix the first filter plate, further, a rotating block is rotatably installed on the funnel, and a positioning slot matching the rotating block is provided on the first filter plate.

[0009] In order to improve the sealing performance, preferably, a sealing ring is fixedly installed at the bottom end of the funnel.

[0010] In order to seal the connection between the funnel and the container, the sealing ring further includes a sealing rubber ring, an inner sealing airbag and an outer sealing airbag. The sealing rubber ring is fixedly connected to the bottom surface of the funnel, the inner sealing airbag and the outer sealing airbag are both fixedly connected to the sealing rubber ring, and the outer sealing airbag is provided with an air nozzle.

[0011] After adopting the above technical scheme, the utility model has the following beneficial effects compared with the prior art: the vacuum negative pressure filtration funnel of the utility model connects the funnel and the container as a whole, and a vacuum suction pipe is arranged on the funnel. When vacuum suction is carried out through the vacuum suction pipe, the interior of the container and the funnel will be sucked out in an integrated manner, and the effect of vacuum negative pressure filtration can be achieved without using a special suction bottle. At the same time, the first filter plate and the second filter plate are protected when the filter paper is broken to avoid cross contamination and separation failure.

[0012] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In the attached picture:

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the internal cross-sectional structure of the utility model;

[0016] Figure 3 It is a schematic diagram of the filter plate structure of the utility model;

[0017] Figure 4 It is a schematic diagram of the sealing ring structure of the utility model.

[0018] In the figure: 1. container; 2. funnel; 201. rotating block; 3. first filter plate; 301. positioning slot; 4. vacuum exhaust pipe; 5. second filter plate; 6. arc-shaped concave plate; 7. guide pipe; 8. fixed connecting rod; 9. sealing ring; 901. sealing rubber ring; 902. inner sealing airbag; 903. outer sealing airbag; 904. air nozzle. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0020] Example:

[0021] Reference Figure 1-4 As shown, the vacuum negative pressure filtration funnel includes a funnel 2, an arc-shaped concave plate 6 is fixedly installed in the funnel 2, the bottom end of the arc-shaped concave plate 6 is fixedly installed and connected with a guide tube 7, the side end of the funnel 2 is fixedly installed and connected with a vacuum suction pipe 4, a first filter plate 3 and a second filter plate 5 are slidably installed in the funnel 2, the first filter plate 3 is located above the second filter plate 5, the second filter plate 5 is located above the arc-shaped concave plate 6, and the connection between the funnel 2 and the vacuum suction pipe 4 is located below the arc-shaped concave plate 6.

[0022] A fixed connecting rod 8 is fixedly installed on the bottom surface of the first filter plate 3, and the fixed connecting rod 8 is fixedly connected to the second filter plate 5. The aperture of the filter slot on the first filter plate 3 is larger than the aperture of the filter slot on the second filter plate 5. A rotating block 201 is rotatably installed on the funnel 2. A positioning slot 301 matching the rotating block 201 is provided on the first filter plate 3. The rotating block 201 is rotated to disassemble or install the first filter plate 3 and the second filter plate 5. The first filter plate 3 and the second filter plate 5 are connected as a whole by the fixed connecting rod 8, which is convenient for taking out from the funnel 2 for cleaning. If the filter paper on the first filter plate 3 is broken, the filter paper fragments and the raw materials in the filter paper flow down from the filter slot of the first filter plate 3 and are filtered and blocked by the second filter plate 5.

[0023] A sealing ring 9 is fixedly installed at the bottom end of the funnel 2, and the sealing ring 9 includes a sealing rubber ring 901, an inner sealing airbag 902 and an outer sealing airbag 903. The sealing rubber ring 901 is fixedly connected to the bottom surface of the funnel 2, and the inner sealing airbag 902 and the outer sealing airbag 903 are both fixedly connected to the sealing rubber ring 901. An air nozzle 904 is provided on the outer sealing airbag 903. When the funnel 2 is connected to the container 1, the bottom end of the sealing rubber ring 901 is against the bottle mouth of the container 1. When the vacuum exhaust pipe 4 is vacuum-exhausted, the inner sealing airbag 902 will expand due to the decrease in the ambient air pressure. The inner sealing airbag 902 blocks the connection between the funnel 2 and the container 1 from the inside. When the inflation device is connected to the air nozzle 904, the outer sealing airbag 903 is inflated, and the expanded outer sealing airbag 903 blocks the connection between the container 1 and the funnel 2 from the outside.

[0024] The utility model connects the container 1 with the funnel 2, the sealing rubber ring 901 is tightly against the bottle mouth of the container 1, the first filter plate 3 and the second filter plate 5 are placed in the funnel 2, the rotating block 201 is rotated to fix it, the filter paper is spread on the first filter plate 3, the raw materials to be filtered are placed on the filter paper, the exhaust device is connected with the vacuum exhaust pipe 4, the inflation device is connected with the air nozzle 904, the interior of the container 1 and the funnel 2 is vacuum-exhausted through the vacuum exhaust pipe 4, and the inner sealing airbag 902 and the outer sealing airbag 903 are expanded and sealed. Under the action of atmospheric pressure and gravity, the solution of the raw material on the filter paper will pass through the filter paper, the first filter plate 3 and the second filter plate 5, and then flow into the container 1 along the arc-shaped concave plate 6 and the guide tube 7. Even if the filter paper is broken, it will be filtered and blocked by the second filter plate 5.

[0025] The above is only a preferred embodiment of the utility model, and does not impose any form of limitation on the utility model. Although the utility model has been disclosed as above in the preferred embodiment, it is not used to limit the utility model. Any technician familiar with this patent can make equivalent replacements or changes based on the technical solution and utility model concept of the utility model without departing from the scope of the technical solution of the utility model, which should be covered within the protection scope of the utility model.

Claims

1. Vacuum negative pressure filtration funnel, characterized in that: The invention comprises a funnel (2), wherein an arc-shaped concave plate (6) is fixedly installed in the funnel (2), the bottom end of the arc-shaped concave plate (6) is fixedly installed and connected to a guide tube (7), the side end of the funnel (2) is fixedly installed and connected to a vacuum suction pipe (4), a first filter plate (3) and a second filter plate (5) are slidably installed in the funnel (2), the first filter plate (3) is located above the second filter plate (5), the second filter plate (5) is located above the arc-shaped concave plate (6), and the connection between the funnel (2) and the vacuum suction pipe (4) is located below the arc-shaped concave plate (6).

2. The vacuum negative pressure filtration funnel according to claim 1, characterized in that: A fixed connecting rod (8) is fixedly mounted on the bottom surface of the first filter plate (3), and the fixed connecting rod (8) is fixedly connected to the second filter plate (5).

3. The vacuum negative pressure filtration funnel according to claim 2, characterized in that: The aperture of the filter slot on the first filter plate (3) is larger than the aperture of the filter slot on the second filter plate (5).

4. The vacuum negative pressure filtration funnel according to claim 3, characterized in that: A rotating clamping block (201) is rotatably mounted on the funnel (2), and a positioning clamping groove (301) matching the rotating clamping block (201) is provided on the first filter plate (3).

5. The vacuum negative pressure filtration funnel according to claim 1, characterized in that: A sealing ring (9) is fixedly mounted on the bottom end of the funnel (2).

6. The vacuum negative pressure filtration funnel according to claim 5, characterized in that: The sealing ring (9) comprises a sealing rubber ring (901), an inner sealing airbag (902) and an outer sealing airbag (903); the sealing rubber ring (901) is fixedly connected to the bottom surface of the funnel (2); the inner sealing airbag (902) and the outer sealing airbag (903) are both fixedly connected to the sealing rubber ring (901); and the outer sealing airbag (903) is provided with an air nozzle (904).

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