Vacuum filtration device

Abstract

The utility model relates to the technical field of chemical engineering, in particular to a vacuum suction filtration device which comprises a suction filtration bottle, the interior of the suction filtration bottle is divided into a main cabin and an auxiliary cabin, the top of the suction filtration bottle is detachably connected with an adapter, the adapter is provided with two upper openings and a lower opening, the top of the adapter is detachably connected with a Buchner funnel, and the Buchner funnel is provided with a lower opening. The lower opening of the Buchner funnel can be communicated with the upper opening of the adapter, the surface of the Buchner funnel is fixedly connected with a protective cover, the protective cover is used for covering the upper surface of the adapter, the surface of the protective cover is provided with a communicating hole, and the communicating hole is communicated with the lower opening of the Buchner funnel. The utility model aims to solve the problem that the conventional suction filtration device generally adopts a single-cabin design mode, so that filtrate and washing liquid are mutually mixed after suction filtration.

Description

Technical Field

[0001] This utility model relates to the field of chemical technology, specifically to a vacuum filtration device. Background Technology

[0002] In experimental research fields such as chemistry, chemical engineering, and medicine, vacuum filtration devices are often used for samples that are difficult to filter. These devices mainly consist of a filtration flask, a Buchner funnel, a vacuum pump, and rubber tubing. Their working principle involves using the vacuum pump to create negative pressure in the filtration flask, causing the liquid in the Buchner funnel to quickly pass through the filter paper and flow into the filtration flask under the pressure difference. Solid particles are retained within the Buchner funnel, thus achieving efficient separation. This device is widely used in chemical and chemical engineering fields for precipitation collection, crystal filtration, and solution purification. It has advantages such as fast filtration speed, good separation effect, and convenient operation. When using this device, ensure the filter paper is tightly fitted to the Buchner funnel, align the lower bevel of the Buchner funnel with the side arm of the filtration flask, wet the filter paper before starting the vacuum pump, and disconnect the vacuum connection before turning off the power to prevent backflow.

[0003] In traditional vacuum filtration technology systems, most filtration devices on the market generally adopt a single-compartment design. This single-compartment structure has an inherent defect: the filtrate and washing liquid are forced to share the same collection space. In the actual filtration process, once the filtrate has been filtered and entered this space, the washing liquid is added, and the two will converge in the same limited space. The filtrate and washing liquid mix with each other, and the mixed liquid has a complex state, which further increases the difficulty of subsequent separation and purification. This makes it difficult to carry out the entire filtration process efficiently and to separate the filtrate, resulting in the filtrate being mixed with the washing liquid. Utility Model Content

[0004] The purpose of this invention is to provide a vacuum filtration device to solve the problem that existing vacuum filtration devices generally adopt a single-compartment design, which leads to the mixing of filtrate and washing liquid after filtration.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A vacuum filtration device includes a filtration flask, the interior of which is divided into a main chamber and a secondary chamber. An adapter is detachably connected to the top of the filtration flask. The adapter has two upper openings and one lower opening. A Buchner funnel is detachably connected to the top of the adapter. The lower opening of the Buchner funnel can communicate with the upper opening of the adapter.

[0007] Preferably, a protective cover is fixedly connected to the surface of the Buchner funnel, and the protective cover is used to cover the upper surface of the adapter.

[0008] Preferably, the surface of the protective cover has a connecting hole, which is connected to the lower opening of the Buchner funnel.

[0009] Preferably, the surface of the protective cover is fitted with a pin assembly for positioning the adapter.

[0010] Preferably, the pin assembly includes a connecting plate and a positioning block, the positioning block is fixedly connected to the surface of the connecting plate, the connecting plate is slidably connected to the surface of the protective cover, and the surface of the protective cover is provided with a pin groove for the positioning block to be inserted.

[0011] Preferably, a sliding block is fixedly connected to the surface of the connecting plate, and a sliding groove for the sliding block to slide is provided on the surface of the protective cover. A spring is fixedly connected between the wall of the sliding groove and the sliding block.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. Dual-compartment independent collection allows for the separation of filtrate and washing solution. By having the filtrate and washing solution flow into different compartments, cross-contamination is avoided. For example, the washing solution dilutes the filtrate. This is especially suitable for experiments that require stepwise collection, such as product separation and impurity washing. Compared with traditional methods that require changing containers, this method is more efficient.

[0014] 2. This device eliminates the need for transfer after solids are trapped. Washing liquid is added directly into the Buchner funnel, and the device is switched to the auxiliary chamber by rotating the adapter, achieving a one-stop operation from filtration to washing to collection. Compared with the traditional method, which requires transferring solids to a new container for washing and resulting in a high loss rate, this device is more practical. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the vertical section of the adapter of this utility model;

[0017] Figure 3 This is a vertical cross-sectional structural diagram of the protective cover of this utility model;

[0018] Figure 4 This is a schematic diagram of the connecting plate of this utility model;

[0019] Figure 5 This is a schematic diagram of the vertical section of the suction filtration bottle of this utility model.

[0020] In the diagram: 1. Filter flask; 2. Divider plate; 3. Rubber sleeve; 4. Adapter; 5. Pin groove; 6. Positioning block; 7. Connecting plate; 8. Sliding block; 9. Spring; 10. Sliding groove; 11. Protective cover; 12. Connecting hole; 13. Rubber pad; 14. Buchner funnel. Detailed Implementation

[0021] 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.

[0022] Please see Figures 1 to 5 This utility model provides a technical solution.

[0023] A vacuum filtration device includes a filtration flask 1, which is internally divided into a main chamber and a secondary chamber. The main chamber receives filtrate, and the secondary chamber receives washing liquid. A detachable adapter 4 is connected to the top of the filtration flask 1. The adapter 4 has two upper openings and one lower opening. The lower opening can be adjusted to face directly above the main chamber or the secondary chamber. The two upper openings are used to input filtrate and washing liquid, respectively. By adjusting the lower opening to face directly above the main chamber or the secondary chamber, the filtrate and washing liquid are output to the main chamber and the secondary chamber, respectively. A Buchner funnel 14 is detachably connected to the top of the adapter 4. The lower opening of the Buchner funnel 14 can communicate with the upper opening of the adapter 4. By rotating the adapter 4, the position of the lower opening of the adapter 4 can be adjusted to switch between facing the main chamber and the secondary chamber, and the position of the upper opening of the adapter 4 can also be adjusted. By adjusting the connection between the different openings and the lower opening of the Buchner funnel 14, filtrate or washing liquid can be input.

[0024] A partition plate 2 is fixedly installed inside the filtration bottle 1. The partition plate 2 is used to divide the inside of the filtration bottle 1 into a main compartment and a secondary compartment.

[0025] A rubber sleeve 3 is installed between the filter bottle 1 and the adapter 4, which helps to increase the sealing of the connection between the filter bottle 1 and the adapter 4.

[0026] A protective cover 11 is fixedly connected to the surface of the Buchner funnel 14. The protective cover 11 is used to cover the upper surface of the adapter 4, which is beneficial to cover the other openings when one of the openings is connected to the lower opening of the Buchner funnel 14.

[0027] The protective cover 11 has a connecting hole 12 on its surface, which is connected to the lower opening of the Buchner funnel 14 to facilitate the passage of liquid.

[0028] The surface of the protective cover 11 is equipped with a pin assembly for positioning the adapter 4, which prevents the upper opening of the adapter 4 from being misaligned with the lower opening of the Buchner funnel 14 during use, thus affecting the flow of liquid. After the pin assembly positions the adapter 4, one upper opening of the adapter 4 will be connected to the connecting hole 12 and the lower opening of the Buchner funnel 14.

[0029] The pin assembly includes a connecting plate 7 and a positioning block 6. The positioning block 6 is fixedly connected to the surface of the connecting plate 7, and the connecting plate 7 is slidably connected to the surface of the protective cover 11. The surface of the protective cover 11 is provided with a pin groove 5 for the positioning block 6 to be inserted. When the adapter 4 is adjusted to the correct position, the positioning block 6 is inserted into the pin groove 5 to position the adapter 4.

[0030] A rubber gasket 13 is fixedly connected to the surface of the protective cover 11 at the lower opening of the connecting hole 12, which helps to increase the sealing between the upper opening of the adapter 4 and the connecting hole 12.

[0031] A sliding block 8 is fixedly connected to the surface of the connecting plate 7. A sliding groove 10 for sliding block 8 is provided on the surface of the protective cover 11. A spring 9 is fixedly connected between the wall of the sliding groove 10 and the sliding block 8. After the connecting plate 7 slides, the connecting plate 7 will automatically reset under the elastic force of the spring 9. This is beneficial for the connecting plate 7 to reset under the elastic force of the spring 9 after the position of the adapter 4 is adjusted and the positioning plug 6 is aligned with the pin groove 5. The positioning plug 6 will automatically embed into the pin groove 5.

[0032] The specific steps are as follows: First, filter paper is laid inside the Buchner funnel 14, with its edges adhering to the inner wall of the funnel 14. The suction port of the filtration flask 1 is connected to a vacuum pump. Then, the adapter 4 is rotated so that its lower opening aligns with the top of the main chamber, and simultaneously positioned using the pin positioning block 6. At this point, the upper opening of the adapter 4 for filtrate is connected to the connecting hole 12 and the lower opening of the Buchner funnel 14. The liquid to be filtered is poured into the Buchner funnel 14. The liquid flows through the lower opening of the Buchner funnel 14, through the connecting hole 12, to the upper opening of the adapter 4 for filtrate, and then from the lower opening of the adapter 4 into the main chamber inside the filtration flask 1. The vacuum pump is then started, and the negative pressure causes the filtrate to quickly flow through the filter paper into the main chamber. Solids are retained on the surface of the filter paper. After the filtrate has completely flowed into the main chamber... Unlock the connecting plate 7, rotate the adapter 4 so that the lower opening is aligned with the upper part of the auxiliary chamber, and at the same time, the upper opening of the washing liquid of the adapter 4 is connected to the connecting hole 12 and the lower opening of the Buchner funnel 14. Then re-insert the positioning block 6 for positioning. By inserting the positioning block 6 into the pin groove 5, the adapter 4 and the protective cover 11 can be aligned and the space between the protective cover 11 and the adapter 4 can be limited. When the positioning block 6 is embedded in the pin groove 5, the adapter 4 can squeeze the rubber gasket 13 for sealing. Then pour the washing liquid, such as distilled water, into the Buchner funnel 14 and repeat the negative pressure process to allow the washing liquid to pass through the filter paper and wash the solid particles. The washing liquid flows into the auxiliary chamber of the suction filtration bottle 1. After the process is completed, turn off the vacuum pump.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A vacuum filtration apparatus comprising a filtration flask (1), characterised in that: The filter bottle (1) is divided into a main cabin and a sub cabin, a top of the filter bottle (1) is detachably connected with an adapter (4), the adapter (4) has two upper openings and one lower opening, a top of the adapter (4) is detachably connected with a Buchner funnel (14), and the lower opening of the Buchner funnel (14) is in communication with the upper opening of the adapter (4).

2. The vacuum filtration apparatus of claim 1, wherein, A surface of the Buchner funnel (14) is fixedly connected with a protective cover (11), and the protective cover (11) is used for covering an upper surface of the adapter (4).

3. The vacuum filtration apparatus of claim 2, wherein, A surface of the protective cover (11) is provided with a communication hole (12), and the communication hole (12) is in communication with the lower opening of the Buchner funnel (14).

4. The vacuum filtration apparatus of claim 2, wherein, A surface of the protective cover (11) is provided with a latch assembly used for positioning the adapter (4).

5. The vacuum filtration apparatus of claim 4, wherein, The latch assembly comprises a connecting plate (7) and a positioning plug (6), the positioning plug (6) is fixedly connected to a surface of the connecting plate (7), the connecting plate (7) is slidingly connected to a surface of the protective cover (11), and a surface of the protective cover (11) is provided with a latch slot (5) in which the positioning plug (6) is embedded.

6. The vacuum filtration apparatus of claim 5, wherein, A surface of the connecting plate (7) is fixedly connected with a sliding block (8), a surface of the protective cover (11) is provided with a sliding groove (10) in which the sliding block (8) slides, and a spring (9) is fixedly connected between a wall surface of the sliding groove (10) and the sliding block (8).

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