Laboratory suction filtration device

Abstract

The utility model discloses a laboratory suction filtration device which comprises a suction filtration bottle, a first filter pipe for containing an acid drying agent, a second filter pipe for containing a neutral drying agent and a third filter pipe for containing an alkaline drying agent, and the first filter pipe, the second filter pipe and the third filter pipe are respectively provided with an air inlet and an air outlet. An extraction opening of the suction flask is communicated with an air inlet in the first filter pipe, the second filter pipe or the third filter pipe through a guide pipe, and an air outlet is connected with a vacuum pump after the air inlet in the first filter pipe, the second filter pipe or the third filter pipe is connected with the extraction opening; the bottom end of the first filter pipe is detachably connected with the top end of the second filter pipe, and the bottom end of the second filter pipe is detachably connected with the top end of the third filter pipe. When different liquids are sucked and filtered, the extraction opening is connected with the filter pipes containing different drying agents, so that the vacuum pump is convenient for experimenters to use, excessive harmful substances are prevented from entering the vacuum pump, and the service life of the vacuum pump is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of smelting equipment, in particular to a laboratory filtration device. Background Art

[0002] Büchner funnels and filtration flasks are commonly used in laboratories for solid-liquid separation. Their operating principle is to use a vacuum pump or exhaust pump to remove air from the filtration flask, creating negative pressure. This pressure draws the liquid in the funnel into the filtration flask, while the solids are trapped by the filter paper or filter element, thus achieving solid-liquid separation. When filtering volatile acidic or alkaline liquids, due to their volatility, they are accompanied by a large amount of acidic or alkaline gases as they are drawn into the filtration flask. These gases carry not only water vapor but also potentially corrosive substances. When these gases, along with water vapor, enter the vacuum pump, they react with the oil or metal components within the vacuum pump, causing oil deterioration and corrosion of the metal components, thereby shortening the vacuum pump's service life.

[0003] A search revealed a filtration device disclosed in the Chinese patent publication number "CN219848386U" that uses different desiccants to absorb acids and bases, thereby reducing the amount of volatile alkaline and acidic substances entering the vacuum pump. However, this patent requires replacing desiccants of different properties based on the acidity and alkalinity of the liquid in the funnel when meeting different experimental requirements. This operation is relatively cumbersome. Therefore, in actual use, experimenters may consider using multiple filter bottles containing different desiccants to accommodate liquids with different properties. However, since the filter bottles are independent of each other, they are inconvenient for experimenters to carry simultaneously and occupy more space when in use, which brings certain inconveniences to the experiment. 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 portable laboratory filtration device which can prevent acidic gas or alkaline gas from entering the vacuum pump and causing damage to the vacuum pump during the filtration process.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: to provide a laboratory filtration device, including a filtration bottle, a first filter tube for holding an acidic desiccant, a second filter tube for holding a neutral desiccant, and a third filter tube for holding an alkaline desiccant; a Büchner funnel is connected to the top of the filtration bottle through a soft rubber pad; the first filter tube, the second filter tube and the third filter tube are all provided with an air inlet and an air outlet; the air suction port of the filtration bottle can be connected to the air inlet on the first filter tube, the second filter tube or the third filter tube through a conduit; after the air inlet on the first filter tube, the second filter tube or the third filter tube is connected to the air suction port, the air outlet is connected to a vacuum pump; the bottom end of the first filter tube is detachably connected to the top end of the second filter tube, and the bottom end of the second filter tube is detachably connected to the top end of the third filter tube.

[0006] Furthermore, the first filter tube includes a first accommodating chamber and a first connecting portion provided at the bottom of the first accommodating chamber, the second filter tube includes a second accommodating chamber and a second connecting portion provided at the bottom of the second accommodating chamber, the top of the second accommodating chamber is provided with a first combining portion adapted to the first connecting portion, the third filter tube includes a third accommodating chamber and a base provided at the bottom of the third accommodating chamber, the first connecting portion and the first combining portion are detachably connected; the top of the third filter tube is provided with a second combining portion adapted to the second connecting portion, the second connecting portion and the second combining portion are detachably connected.

[0007] Furthermore, the first connecting portion is a first connecting groove extending downward along the bottom of the first accommodating cavity, the inner wall of the first connecting groove is provided with a first internal thread, the first combining portion is a first connecting section arranged at the top of the second accommodating cavity, the outer periphery of the first connecting section is provided with a first external thread adapted to the first internal thread, the first connecting groove and the first connecting section are threadedly connected through the first internal thread and the first external thread; the second connecting portion is a second connecting groove extending downward along the bottom of the second accommodating cavity, the inner wall of the second connecting groove is provided with a second internal thread, the second combining portion is a second connecting section arranged at the top of the third accommodating cavity, the outer side wall of the second connecting section is provided with a second external thread adapted to the second internal thread, and the second connecting groove and the second connecting section are threadedly connected through the second internal thread and the second external thread.

[0008] Furthermore, a first sealing ring and a second sealing ring are respectively provided at the connection between the first internal thread and the first external thread, and at the connection between the second internal thread and the second external thread.

[0009] Furthermore, the first connecting groove, the second connecting groove and the base are integrally formed with the first accommodating cavity, the second accommodating cavity and the third accommodating cavity respectively.

[0010] Furthermore, an annular groove is provided in the tube wall at the top end of the first filter tube, the second filter tube and the third filter tube. The annular groove is recessed along the length direction of the tube wall, and the annular groove is used to place a card with desiccant properties.

[0011] Furthermore, the air inlets are all arranged at the bottom ends of the first filter tube, the second filter tube and the third filter tube, and the air outlets are all arranged at the top ends of the first filter tube, the second filter tube and the third filter tube.

[0012] Furthermore, it also includes a sealing cap that is detachably mounted on the first filter tube, the second filter tube and / or the third filter tube and is used to seal the air inlet and the air outlet.

[0013] Furthermore, a tube cap for sealing the first filter tube is provided at the top end of the first filter tube.

[0014] Furthermore, the first filter tube, the tube cap, the second filter tube and the third filter tube are all made of glass.

[0015] The utility model discloses a laboratory filtration device. The utility model comprises a first filter tube, a second filter tube and a third filter tube for holding an acidic desiccant, a neutral desiccant and an alkaline desiccant. The first filter tube, the second filter tube and the third filter tube can be connected to the third filter tube when filtering an acidic liquid; the first filter tube can be connected to the first filter tube when filtering an alkaline liquid, and the second filter tube can be connected to the second filter tube when filtering a neutral liquid. At the same time, during the filtration process, the first filter tube and the second filter tube can be connected in parallel, the acidic and neutral desiccant can be connected, and the alkaline and neutral desiccant can also be connected, so as to ensure the absorption of different acidic and alkaline volatile substances and moisture. When there are many harmful gases, a plurality of drying towers can be connected in series, effectively solving the problem of acidic or alkaline gas and water vapor polluting a vacuum pump and extending the service life of the vacuum pump. At the same time, the first filter tube, the second filter tube and the third filter tube are designed to be detachably connected, which is more convenient for experimental personnel to carry and increases the convenience of use. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0017] Figure 2 It is a schematic diagram of the connection structure of the first filter tube and the second filter tube in the utility model.

[0018] Figure 3 It is a schematic diagram of the connection structure of the second filter tube and the third filter tube in the utility model.

[0019] Figure 4 It is a schematic diagram of the utility model in use state.

[0020] Figure 5It is a structural schematic diagram of the first filter tube, the second filter tube and the third filter tube after being connected in the utility model.

[0021] Figure 6 yes Figure 5 Schematic diagram of the enlarged structure at point A in the middle.

[0022] The meanings of the various numbers in the accompanying drawings are: suction bottle 1; soft rubber pad 11; Büchner funnel 12; first filter tube 2; first accommodating chamber 21; first connecting part 22; first connecting groove 221; first internal thread 2211; tube cap 23; second filter tube 3; second accommodating chamber 31; first joint 311; first connecting section 3111; first external thread 31111; second connecting part 32; second connecting groove 321; second internal thread 3211; third filter tube 4; third accommodating chamber 41; second joint 411; second connecting section 4111; second external thread 41111; base 42; air inlet 5; air outlet 6; annular groove 7; sealing cap 8. DETAILED DESCRIPTION

[0023] The following is further described in detail through specific implementation methods:

[0024] See Figure 1 The utility model provides a laboratory filtration device, comprising a filtration bottle 1, a first filter tube 2 for holding an acidic desiccant, a second filter tube 3 for holding a neutral desiccant, and a third filter tube 4 for holding an alkaline desiccant. A Büchner funnel 12 is connected to the top of the filtration bottle 1 through a soft rubber pad 11, and an air inlet 5 and an air outlet 6 are provided on the first filter tube 2, the second filter tube 3 and the third filter tube 4. The air extraction port of the filtration bottle 1 can be connected to the air inlet 5 on the first filter tube 2, the second filter tube 3 or the third filter tube 4 through a conduit, and after the air inlet 5 on the first filter tube 2, the second filter tube 3 or the third filter tube 4 is connected to the air extraction port, the air outlet 6 is connected to a vacuum pump. The bottom end of the first filter tube 2 is detachably connected to the top end of the second filter tube 3, and the bottom end of the second filter tube 3 is detachably connected to the top end of the third filter tube 4. The utility model enables the experimenter to use desiccants with different properties according to the properties of the liquid during solid-liquid separation through the first filter tube 2, the second filter tube 3 and the third filter tube 4 for holding acidic desiccant, neutral desiccant and alkaline desiccant, so as to absorb the gas and prevent the gas from entering the vacuum pump, which is more convenient to use.

[0025] Please continue to see Figure 2 and Figure 3In order to achieve detachable connection between the first filter tube 2 and the second filter tube 3, as well as between the second filter tube 3 and the third filter tube 4, specifically, the first filter tube 2 includes a first accommodating chamber 21 and a first connecting portion 22 provided at the bottom of the first accommodating chamber 21; the second filter tube 3 includes a second accommodating chamber 31 and a second connecting portion 32 provided at the bottom of the second accommodating chamber 31; and the third filter tube 4 includes a third accommodating chamber 41 and a base 42 provided at the bottom of the third accommodating chamber 41. A first coupling portion 311 adapted to the first connecting portion 22 is provided at the top of the second accommodating chamber 31, and the first connecting portion 22 and the first coupling portion 311 are detachably connected. A second coupling portion 411 adapted to the second connecting portion 32 is provided at the top of the third accommodating chamber 41, and the second connecting portion 32 and the second coupling portion 411 are detachably connected. In this embodiment, the first connecting portion 22 is a first connecting groove 221 extending downward along the bottom of the first accommodating chamber 21, and the inner wall of the first connecting groove 221 is provided with a first internal thread 2211. The first coupling portion 311 is a first connecting section 3111 provided at the top of the second accommodating chamber 3, and the outer periphery of the first connecting section 3111 is provided with a first external thread 31111 adapted to the first internal thread 2211. The first connecting groove 221 and the first connecting section 3111 are threadedly connected through the first internal thread 2111 and the first external thread 31111. The second connecting portion 32 is a second connecting groove 321 extending downward from the bottom of the second accommodating chamber 33. The inner wall of the second connecting groove 321 is provided with a second internal thread 3211. The second coupling portion 411 is a second connecting section 4111 provided at the top of the third accommodating chamber 41. The outer wall of the second connecting section 4111 is provided with a second external thread 41111 that matches the second internal thread 3211. The second connecting groove 321 and the second connecting section 4111 are threadedly connected via the second internal thread 3211 and the second external thread 41111. To ensure better overall connectivity, the first connecting groove 221, the second connecting groove 321, and the base 42 are designed as an integrally formed structure with the first accommodating chamber 21, the second accommodating chamber 3, and the third accommodating chamber 41, respectively. In this embodiment, the outer diameter of the first connecting section 3111 is smaller than that of the second accommodating chamber 31, and the outer diameter of the second accommodating chamber 31 is the same as that of the first connecting groove 221. The outer diameter of the second connecting section 4111 is smaller than that of the third filter tube 4, and the outer diameter of the second connecting groove 321 is the same as that of the third filter tube 4. This design ensures that the first connecting groove 221 precisely mates with the second accommodating chamber 31 after connecting with the first connecting section 3111, and the second connecting groove 321 precisely mates with the third accommodating chamber 41 after connecting with the second connecting section 4111, thereby enhancing the overall stability of the structure and the sealing performance of the joints.

[0026] In order to improve the sealing performance of the threaded connection and prevent gas leakage, a first sealing ring (not shown) and a second sealing ring (not shown) are respectively provided at the connection between the first internal thread 2211 and the first external thread 31111, and the second internal thread 3211 and the second external thread 41111. The provision of the first sealing ring and the second sealing ring can increase the overall sealing performance and prevent pollution caused by gas leakage. Since the first connecting groove 221 seals the second filter tube 3 and the second connecting groove 321 seals the third filter tube 4, a pipe cap 23 for sealing the first filter tube 2 is provided at the top of the first filter tube 2. The detachable connection also makes it convenient for experimenters to clean the first filter tube 2, the second filter tube 3 and the third filter tube 4 and replace the desiccant in the first filter tube 2, the second filter tube 3 and the third filter tube 4.

[0027] After the first, second, and third filter tubes 2, 3, and 4 are connected, the experimenter can choose to connect them to the first, second, or third filter tubes 2, 3, or 4, depending on the properties of the liquid, to facilitate gas adsorption. To ensure sufficient contact between the gas and the desiccant, an air inlet 5 is located at the bottom of each of the first, second, and third filter tubes 2, 3, and 4, and an air outlet 6 is located at the top of each of the first, second, and third filter tubes 2, 3, and 4. Since the desiccant is located at the bottom of each of the first, second, and third filter tubes 2, 3, and 4, placing the air inlet 5 at the bottom of each of the first, second, and third filter tubes 2, 3, and 4 allows the gas to enter the first, second, and third filter tubes 2, 3, and 4 and then come into contact with the desiccant. Furthermore, placing the air outlet 6 at the top of each of the first, second, and third filter tubes 2, 3, and 4 allows the gas to fully pass through the desiccant before being discharged through the air outlet 6, maximizing the interaction between the gas and the desiccant. When not in use, to prevent moisture from the air from entering the first filter tube 2, the second filter tube 3, or the third filter tube 4, the present invention further includes a sealing cap 8 that can be detachably mounted on the first filter tube 2, the second filter tube 3, and / or the third filter tube 4 to seal the air inlet 5 and the air outlet 6. When needed, the sealing cap 8 can be removed. The sealing cap 8 keeps the first filter tube 2, the second filter tube 3, and the third filter tube 4 sealed, thus preventing any impact on the use of the desiccant. Specifically, when drying alkaline gas, the sealing cap 8 is removed from the air inlet 5 and the air outlet 6 of the first filter tube 2, while the sealing caps 8 of the second filter tube 3 and the second filter tube 4 remain sealed. The suction port of the suction bottle is then connected to the air inlet 5 of the first filter tube 2, and the air outlet 6 of the first filter tube 2 is then connected to a vacuum pump. When drying acidic gas, the third filter tube 4, which is connected to the alkaline desiccant, is connected in the same manner. In order to achieve better absorption effect, the first filter tube 2 (acidic) and the second filter tube 3 (neutral) can be connected, and the third filter tube 4 (alkaline) and the second filter tube 3 (neutral) can also be connected to ensure the absorption of different alkaline and acidic volatile substances and moisture. Specifically, the air inlet 5 of the first filter tube 2 (acidic) can be connected with a conduit, and the air outlet 6 of the first filter tube 2 can be connected to the air inlet 5 of the second filter tube 3 (neutral) through a conduit, and the air outlet 6 of the second filter tube 3 can be connected to the vacuum pump. The third filter tube 4 (alkaline) can be connected to the second filter tube 3 (neutral) in the same way. Of course, please refer to Figure 4 In order to ensure complete absorption, when there is a lot of harmful gases, multiple first filter tubes 2, second filter tubes 3 or third filter tubes 4 can be used in series.

[0028] Please continue to see Figure 5 and Figure 6In this embodiment, the first filter tube 2, the second filter tube 3, and the third filter tube 4 are all made of glass. To facilitate the experimenter's ability to distinguish the desiccants of different properties contained in the different filter tubes, an annular groove 7 is provided at the top of each of the first, second, and third filter tubes 2, 3, and 4, extending along the length of the tube wall. This groove is used to hold a card indicating the desiccant's properties. Specifically, the annular groove 7 of the first filter tube 2 is located at the top of the first accommodating chamber 21, and the cap 23 is positioned outside the top of the first accommodating chamber 21. The annular groove 7 of the second filter tube 3 is located at the top of the second accommodating chamber 31. The first external thread 31111 is provided on the outside of the annular groove 7 of the second filter tube 3, and the second external thread 41111 is provided on the outside of the annular groove 7 of the third filter tube 4. When the first, second, and third filter tubes 2, 3, and 4 are connected, the first connecting groove 221 is threadedly connected to the outside of the annular groove 7 of the second filter tube 3, and the second connecting groove 321 is threadedly connected to the outside of the annular groove 7 of the third filter tube 4. Since the first filter tube 2, the tube cap 23, the second filter tube 3 and the third filter tube 4 are all made of glass, when the cards are placed in the annular grooves 7, even if the first filter tube 2, the second filter tube 3 and the third filter tube 4 are in a connected state, the experimenter can clearly see the contents on the card from the outside and use the desiccant according to the properties marked on the card, thereby avoiding mistakes made by the experimenter during use.

[0029] The beneficial effect of the laboratory filtration device of the present invention is that the first filter tube containing the acidic desiccant, the second filter tube containing the neutral desiccant and the third filter tube containing the alkaline desiccant are designed as a detachable connection structure, which can be convenient for the experimenter to carry. Since the desiccants of different properties are configured at the same time, it is more convenient for the experimenter to use, and it is also more convenient to clean and store after use. When using, the experimenter only needs to connect different filter tubes according to the properties of the filtered liquid, and there is no need to temporarily replace the desiccant that is compatible with it according to the properties of the liquid in the laboratory. At the same time, during the filtration process, the acidic and neutral can be connected, and the alkaline and neutral can also be connected to ensure the absorption of different acidic and alkaline volatile substances and moisture, and the absorption is more sufficient. When there are more harmful gases, multiple drying towers can be connected in series for absorption, which avoids acidic or alkaline gases and water vapor from entering the vacuum pump to the greatest extent.

[0030] The above are merely examples of the present invention, and the well-known specific structures and characteristics of the scheme are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of the present invention, and these modifications should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention and the practicality of the present invention.

Claims

1. A laboratory filtration device, comprising a filtration bottle connected to a Büchner funnel via a soft rubber pad, characterized in that: It also includes a first filter tube for holding an acidic desiccant, a second filter tube for holding a neutral desiccant, and a third filter tube for holding an alkaline desiccant. The first filter tube, the second filter tube, and the third filter tube are all provided with an air inlet and an air outlet. The air suction port of the suction bottle can be connected to the air inlet on the first filter tube, the second filter tube, or the third filter tube through a conduit. After the air inlet on the first filter tube, the second filter tube, or the third filter tube is connected to the air suction port, the air outlet is connected to a vacuum pump. The bottom end of the first filter tube is detachably connected to the top end of the second filter tube, and the bottom end of the second filter tube is detachably connected to the top end of the third filter tube.

2. A laboratory filtration device according to claim 1, characterized in that: The first filter tube includes a first accommodating chamber and a first connecting portion provided at the bottom of the first accommodating chamber, the second filter tube includes a second accommodating chamber and a second connecting portion provided at the bottom of the second accommodating chamber, the third filter tube includes a third accommodating chamber and a base provided at the bottom of the third accommodating chamber, a first combining portion adapted to the first connecting portion is provided at the top of the second accommodating chamber, and the first connecting portion and the first combining portion are detachably connected; a second combining portion adapted to the second connecting portion is provided at the top of the third accommodating chamber, and the second connecting portion and the second combining portion are detachably connected.

3. A laboratory filtration device according to claim 2, characterized in that: The first connecting portion is a first connecting groove extending downward along the bottom of the first accommodating cavity, and the inner wall of the first connecting groove is provided with a first internal thread. The first combining portion is a first connecting section arranged at the top of the second accommodating cavity, and the outer periphery of the first connecting section is provided with a first external thread adapted to the first internal thread. The first connecting groove and the first connecting section are threadedly connected through the first internal thread and the first external thread. The second connecting portion is a second connecting groove extending downward along the bottom of the second accommodating cavity, and the inner wall of the second connecting groove is provided with a second internal thread. The second combining portion is a second connecting section arranged at the top of the third accommodating cavity, and the outer side wall of the second connecting section is provided with a second external thread adapted to the second internal thread. The second connecting groove and the second connecting section are threadedly connected through the second internal thread and the second external thread.

4. A laboratory filtration device according to claim 3, characterized in that: A first sealing ring and a second sealing ring are respectively provided at the connection points between the first internal thread and the first external thread, and between the second internal thread and the second external thread.

5. A laboratory filtration device according to claim 3, characterized in that: The first connecting groove, the second connecting groove and the base are integrally formed with the first accommodating cavity, the second accommodating cavity and the third accommodating cavity respectively.

6. A laboratory filtration device according to claim 1, characterized in that: An annular groove is provided in the tube wall at the top end of each of the first filter tube, the second filter tube and the third filter tube. The annular groove is recessed along the length direction of the tube wall. The annular groove is used to place a card with desiccant properties.

7. A laboratory filtration device according to claim 1, characterized in that: The air inlets are all arranged at the bottom ends of the first filter tube, the second filter tube and the third filter tube, and the air outlets are all arranged at the top ends of the first filter tube, the second filter tube and the third filter tube.

8. A laboratory filtration device according to claim 1, characterized in that: It also includes a sealing cap that is detachably mounted on the first filter tube, the second filter tube and / or the third filter tube and is used to seal the air inlet and the air outlet.

9. A laboratory filtration device according to claim 1, characterized in that: A tube cap for sealing the first filter tube is provided at the top end of the first filter tube.

10. A laboratory filtration device according to claim 9, characterized in that: The first filter tube, the tube cap, the second filter tube, and the third filter tube are all made of glass.

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