Suction filtration device

Abstract

The utility model discloses a suction filtration device which comprises a suction filtration bottle used for collecting filtrate after filtration; the filter comprises a filtering part and a filtering pipe, and the filtering part is arranged in the filtering pipe; one end of the first connecting pipe is fixedly connected to the inlet of the suction filtration bottle, an elastic sealing piece is arranged at the other end of the first connecting pipe, and the filter pipe penetrates through a through hole in the elastic sealing piece to be communicated with the first connecting pipe; the second connecting pipe is fixedly arranged in the first connecting pipe and is communicated with the suction flask and the filter, and the upper end of the second connecting pipe extends in the axial direction of the filter so as to limit the position of the filter pipe. According to the suction filtration device, the position of the filter pipe is limited through the second connecting pipe, so that the filter pipe can be prevented from moving or inclining in the suction filtration process, and the suction filtration process is ensured to be smoothly carried out.

Description

Technical Field

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

[0002] Glass crucibles are often used in chemical analysis, health inspection, pharmaceutical industry, biological products and other industries for testing and analysis. They are often used to handle unstable reagents and precipitation that do not require filter paper, high temperature drying, ashing or weighing. Glass crucibles are an important tool for filtering and processing different substances in laboratories.

[0003] When performing filtration in the laboratory, a rubber stopper is usually used to fix the glass crucible. However, due to the material and connection method of the rubber stopper, it cannot provide sufficient stability to ensure that the position of the glass crucible is fixed during the filtration process. In addition, due to the flow of liquid and the vibration of the filtration bottle, the connection between the rubber stopper and the glass crucible may become loose, which may cause the glass crucible to move or tilt during the filtration process, thereby affecting the smooth progress of the filtration process. Utility Model Content

[0004] The utility model aims to provide a suction filtration device to solve the problem that a filter tube is easily moved or tilted when fixed by a rubber stopper.

[0005] The utility model is realized through the following technical solutions.

[0006] A suction filtration device, comprising:

[0007] A suction flask is used to collect the filtrate after filtration;

[0008] A filter, comprising a filter portion and a filter tube, wherein the filter portion is arranged in the filter tube;

[0009] A first connecting tube, one end of which is fixedly connected to the inlet of the suction filtration bottle, and the other end of which is provided with an elastic sealing member, and the filter tube passes through a through hole on the elastic sealing member to communicate with the first connecting tube;

[0010] The second connecting tube is fixedly arranged in the first connecting tube and connects the suction filtration bottle and the filter. The upper end of the second connecting tube is extended along the axial direction of the filter to limit the position of the filter tube.

[0011] As a further improvement of the present invention, the upper end of the first connecting tube extends into the filter tube and the outer wall of the second connecting tube is in close contact with the inner wall of the filter tube.

[0012] As a further improvement of the present invention, the upper end of the second connecting pipe extends to abut against the filter portion.

[0013] As a further improvement of the present invention, the lower end of the second connecting tube extends into the suction filtration bottle.

[0014] As a further improvement of the present invention, the first connecting tube and the suction filtration bottle are threadedly connected, the inlet of the suction filtration bottle is provided with an external thread, and the lower end of the first connecting tube is provided with an internal thread that matches the external thread bottle.

[0015] As a further improvement of the utility model, a drainage tube connected to a vacuum pump is provided on the outlet of the filtration bottle, and a regulating valve is provided on the drainage tube. The regulating valve is used to adjust the vacuum degree in the filtration bottle to control the filtration speed.

[0016] As a further improvement of the utility model, an isolation bottle connecting the drainage tube and the vacuum pump is provided between the drainage tube and the vacuum pump.

[0017] As a further improvement of the present invention, the aperture of the through hole is smaller than the outer diameter of the filter tube.

[0018] As a further improvement of the present invention, the elastic sealing member is configured as a rubber plug.

[0019] As a further improvement of the utility model, the filter is a glass sand core crucible.

[0020] Beneficial effects of the utility model:

[0021] The utility model provides a suction filtration device, which limits the position of a filter tube by a second connecting tube in a first connecting tube, and can prevent the filter tube from moving or tilting during the suction filtration process, thereby ensuring the smooth progress of the suction filtration process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The following is a detailed description of the preferred implementation examples of the present invention with reference to the accompanying drawings to help understand the purpose and advantages of the present invention, wherein:

[0023] Figure 1 It is a partial structural schematic diagram of the utility model;

[0024] Figure 2 It is a schematic diagram of the structure of the utility model;

[0025] In the figure:

[0026] 1. Filter bottle; 2. Filter; 21. Filter part; 22. Filter tube; 3. First connecting tube; 4. Second connecting tube; 5. Elastic sealing member; 51. Through hole; 6. Vacuum pump; 7. Drainage tube; 8. Regulating valve; 9. Isolation bottle. DETAILED DESCRIPTION

[0027] The utility model is further described in detail below based on the accompanying drawings and implementation cases.

[0028] The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or may be mentioned in this specification are defined relative to the structures shown in the drawings. The words "inside" and "outside" refer to the direction toward or away from the geometric center of a specific component, respectively. They are relative concepts, and therefore may change accordingly according to different locations and different usage conditions. Therefore, these or other directional terms should not be interpreted as restrictive terms.

[0029] This embodiment provides a suction filtration device, referring to Figure 1~2 , including a suction bottle 1 and a filter 2 for collecting filtered filtrate, the filter 2 including a filter portion 21 and a filter tube 22, the filter portion 21 being used to remove solid particles, suspended matter or sediment in the filtrate, the filter portion 21 being arranged in the filter tube 22, the suction bottle 1 and the filter 2 being connected through a first connecting tube 3, one end of the first connecting tube 3 being connected to the inlet of the suction bottle 1, and the other end being provided with an elastic sealing member 5, the elastic sealing member 5 having a through hole for allowing the filter tube 22 to pass through, the filter tube 22 passing through the elastic sealing member 5 and being connected to the first connecting tube 3, and the elastic sealing member 5 providing elastic force to fix the filter tube 22, a second connecting tube 4 being fixedly arranged in the first connecting tube 3, the second connecting tube 4 connecting the suction bottle 1 and the filter tube 22, the upper end of the second connecting tube 4 extending along the axial direction of the filter tube 22 to limit the position of the filter tube 22, the limiting effect of the second connecting tube 4 on the filter tube 22 can prevent the filter tube 22 from shaking or tilting during the suction filtration process, thereby ensuring the smooth progress of the suction filtration process.

[0030] Furthermore, the upper end of the second connecting tube 4 extends into the filter tube 22, so that the filtrate can be transmitted to the suction bottle 1 through the second connecting tube 4. At the same time, the outer wall of the second connecting tube 4 is in close contact with the inner wall of the filter tube 22, that is, the second connecting tube 4 limits the filter tube 22 in the radial direction to prevent the filter tube 22 from shaking during the filtration process, thereby ensuring the stability of the filter tube 22.

[0031] Furthermore, the lower end of the second connecting tube 4 extends into the filtration bottle 1 , so that the filtrate can be directly input into the filtration bottle 1 through the second connecting tube 4 , which helps to improve the filtration efficiency.

[0032] In this embodiment, the first connecting tube 3 and the suction bottle 1 are threadedly connected, an external thread is provided on the inlet of the suction bottle 1, and an internal thread matching the external thread bottle is provided on the lower end of the first connecting tube 3. The threaded connection structure ensures the sealing between the first connecting tube 3 and the suction bottle 1.

[0033] In this embodiment, a drainage tube 7 connected to a vacuum pump 6 is provided at the outlet of the filtration bottle 1, and a regulating valve 8 is provided on the drainage tube 7, that is, the regulating valve 8 is used to adjust the vacuum degree in the filtration bottle 1. During the filtration process, when the vacuum degree is high, the suction force generated by the vacuum pump 6 is relatively large, which can easily cause the air flow and liquid flow inside the filter tube 22 to become unstable, thereby increasing the risk of the filter tube 22 shaking. The regulating valve 8 can reasonably control the vacuum degree in the filtration bottle 1, which helps to improve the stability of the filtration tube during the filtration process.

[0034] At the same time, an isolation bottle is arranged between the suction bottle 1 and the vacuum pump 6. The isolation bottle 9 can balance the pressure difference between the vacuum pump 6 and the suction bottle 1, so that the vacuum degree is maintained in a relatively stable range. At the same time, the isolation bottle 9 can also prevent the vacuum pump 6 from being directly connected to the suction bottle 1, which helps to reduce the interference of the vibration generated during the operation of the vacuum pump 6 on the filter tube 22.

[0035] In this embodiment, the aperture of the through hole on the elastic seal 5 is smaller than the outer diameter of the filter tube 22, so that the elastic seal 5 can fit tightly with the outer wall of the filter tube 22, thereby ensuring the sealing effect of the elastic seal 5. Preferably, the elastic seal 5 is set as a rubber plug.

[0036] In this embodiment, the suction filter is configured as a glass sand core crucible.

[0037] Finally, it should be noted that the above implementation cases are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the above implementation cases, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above implementation cases, or replace some of the technical features therein with equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the implementation cases of the utility model.

Claims

1. A suction filtration device, characterized in that: include: A suction filtration bottle (1), used to collect the filtrate after filtration; A filter (2) comprising a filter portion (21) and a filter tube (22), wherein the filter portion (21) is arranged inside the filter tube (22); A first connecting tube (3), one end of which is fixedly connected to the inlet of the suction filtration bottle (1), and the other end of which is provided with an elastic sealing member (5), and the filter tube (22) passes through a through hole (51) on the elastic sealing member (5) to communicate with the first connecting tube (3); A second connecting tube (4) is fixedly arranged in the first connecting tube (3) and connects the suction filtration bottle (1) and the filter tube (22); the upper end of the second connecting tube (4) is extended along the axial direction of the filter tube (22) to define the position of the filter tube (22).

2. A suction filtration device according to claim 1, characterized in that: The upper end of the second connecting tube (4) extends into the filter tube (22) and the outer wall of the second connecting tube (4) is in close contact with the inner wall of the filter tube (22).

3. A suction filtration device according to claim 2, characterized in that: The upper end of the second connecting pipe (4) extends until it contacts the filter portion (21).

4. A suction filtration device according to claim 1, characterized in that: The lower end of the second connecting tube (4) extends into the suction filtration bottle (1).

5. A suction filtration device according to claim 1, characterized in that: The first connecting tube (3) is threadedly connected to the suction filtration bottle (1); an external thread is provided on the inlet of the suction filtration bottle (1); and an internal thread matching the external thread bottle is provided on the lower end of the first connecting tube (3).

6. A suction filtration device according to claim 1, characterized in that: A drainage tube (7) connected to a vacuum pump (6) is provided at the outlet of the suction filtration bottle (1), and a regulating valve (8) is provided on the drainage tube (7).

7. A suction filtration device according to claim 6, characterized in that: An isolation bottle (9) is provided between the drainage tube (7) and the vacuum pump (6) to connect the two.

8. A suction filtration device according to claim 1, characterized in that: The aperture of the through hole (51) is smaller than the outer diameter of the filter tube (22).

9. A suction filtration device according to claim 8, characterized in that: The elastic sealing member is configured as a rubber plug.

10. A suction filtration device according to any one of claims 1 to 9, characterized in that: The filter (2) is a glass sand core crucible.

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