CN212731250U - Prevent broken hole of filter paper and suction filtration device of suck-back - Google Patents
Prevent broken hole of filter paper and suction filtration device of suck-back Download PDFInfo
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- CN212731250U CN212731250U CN202020788062.4U CN202020788062U CN212731250U CN 212731250 U CN212731250 U CN 212731250U CN 202020788062 U CN202020788062 U CN 202020788062U CN 212731250 U CN212731250 U CN 212731250U
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- vacuum pump
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- micropore
- tee bend
- suction filtration
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Abstract
The utility model belongs to the technical field of experimental facilities, specifically a prevent broken hole of filter paper and suction filtration device of suck-back. The problem of the suck-back when solving the broken hole of filter paper and the experiment end when suction filtration that leads to because vacuum increases too fast starts is solved, including vacuum pump, tee bend structure and buchner flask, tee bend structure's left end and vacuum pump intercommunication, tee bend structure's right-hand member and buchner flask intercommunication, buchner flask installs on upper portion the funnel, tee bend structure's upper end exit is provided with block structure, the last opening of block structure has a plurality of micropores, is provided with the micropore end cap that can dismantle in the micropore. The utility model discloses can prevent to directly to close the suction flask suck-back that the vacuum pump leads to pollute the connection that leads to under filtrating and the vacuum pump operational aspect and be difficult to the disconnection. Meanwhile, due to the existence of the one-way valve with the three-way structure, even if the power supply of the vacuum pump is directly turned off by error operation, the filtrate can be prevented from being polluted by suck-back.
Description
Technical Field
The utility model belongs to the technical field of experimental facilities, specifically a prevent broken hole of filter paper and suction filtration device of suck-back.
Background
In experiments in the fields of biology, chemistry, and the like, filtration is a basic experiment. Generally, a vacuum pump is directly communicated with a filter flask, and the pressure in the filter flask is reduced by using an air pump, so that the aim of solid-liquid separation is fulfilled. When the suction filtration is started, the filter paper is broken due to the fact that the vacuum degree is increased too fast, and therefore the suction filtration experiment fails. When the suction filtration finishes, if directly close the vacuum pump, often can lead to suck-back because there is the negative pressure in the buchner flask to pollute the filtrating, consequently the experimenter often can pull out the pump under the condition of vacuum pump operation and be connected with the buchner flask, because the existence of negative pressure, the connection of pipeline is very tight, and difficult disconnection still can hit the suction filtration device hard, leads to the instrument to damage, the experiment failure.
Disclosure of Invention
The utility model discloses a solve because the filtration paper when the suction filtration that the vacuum increases too fast and lead to starts the broken hole of hole and the suck-back problem when the experiment finishes, provide a prevent the suction filtration device of the broken hole of filtration paper and suck-back.
The utility model adopts the following technical proposal: the utility model provides a prevent suction filtration device of broken hole of filter paper and suck-back, includes vacuum pump, tee bend structure and buchner flask, the left end and the vacuum pump intercommunication of tee bend structure, tee bend structure's right-hand member and buchner flask intercommunication, the funnel is installed on buchner flask upper portion, the upper end exit of tee bend structure is provided with block structure, the last opening of block structure has a plurality of micropores, is provided with the micropore end cap that can dismantle in the micropore.
Furthermore, a one-way valve is arranged in the three-way structure and is arranged at one end connected with the filter flask.
During suction filtration, a vacuum pump is connected with one end of a three-way structure provided with a single valve, a suction filtration bottle is connected with the other end of the three-way structure, a micropore plug is taken out of a micropore, the vacuum pump is started, feed liquid is poured into a funnel with filter paper laid in advance, the micropore plugs are inserted into the micropore one by one, the vacuum degree of the vacuum pump is observed at the same time, the vacuum degree is increased slowly, after filter paper forms a filter cake with a certain thickness, all the micropore plugs are inserted into the micropore, the filter paper can be prevented from breaking holes, and the success rate of suction filtration operation is improved. After the suction filtration is finished, the micropore plug is pulled out from the micropore, so that the normal pressure of the filter flask is recovered, the connection between the filter flask and the three-way structure is disconnected, the power supply of the vacuum pump is turned off, the micropore plug is inserted into the micropore, and the experiment is finished.
Compared with the prior art, the utility model discloses can prevent to directly to close the suction flask suck-back that the vacuum pump leads to pollute the connection that leads to under filtrating and the vacuum pump operational aspect and be difficult to the disconnection. Meanwhile, due to the existence of the one-way valve with the three-way structure, even if the power supply of the vacuum pump is directly turned off by error operation, the filtrate can be prevented from being polluted by suck-back.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view taken at 5 in FIG. 1;
in the figure, 1-a vacuum pump, 2-a three-way structure, 3-a filter flask, 4-a funnel, 5-a blocking structure, 6-a one-way valve, 7-a three-way structure, a port top view, 8-a micropore and 9-a micropore plug.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention; based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in figures 1 and 2, the suction filtration device for preventing the filter paper from breaking the hole and sucking backwards comprises a vacuum pump 1, a three-way structure 2 and a suction flask 3, wherein the left end of the three-way structure 2 is communicated with the vacuum pump 1, the right end of the three-way structure 2 is communicated with the suction flask 3, a funnel 4 is installed on the upper part of the suction flask 3, a plugging structure 5 is arranged at an upper end outlet of the three-way structure 2, a plurality of micropores 8 are formed in the plugging structure 5, and a detachable micropore plug 9 is arranged in each micropore 8. A one-way valve 6 is arranged in the three-way structure 2, and the one-way valve 6 is arranged at one end connected with the filter flask 3.
When the experiment begins, the vacuum pump 1 is connected with the filter flask 3 through the three-way structure 2, the vacuum pump 1 is connected to one side with the single valve 6, the funnel 4 is connected with the filter flask 3, the micropore plug 9 is pulled out of the micropore 8, the vacuum pump 1 is opened, feed liquid needing to be filtered is poured into the funnel 4, one micropore plug 9 is inserted into the micropore 8, the vacuum degree of the micropore plug is observed, the second micropore plug 9 is inserted into the micropore 8, the vacuum degree of the micropore plug is observed, the rest is done by analogy, until the vacuum pump 1 generates smaller vacuum, liquid drops flow into the filter flask 3 from the funnel 4, a filter cake with a certain thickness is formed in the funnel 4, and after the filter paper is not easy to break, all the micropore plugs 9 can be inserted into the micropore 8.
After the filtration is finished, the microporous plugs 9 are pulled out of the micropores 8, so that the normal pressure in the filter flask 3 is recovered, the connection between the filter flask 3 and the three-way structure 2 can be easily disconnected, the reverse suction of the filter flask is avoided, the power supply of the filter flask 3 is turned off, all the microporous plugs 9 are inserted into the micropores 8, and the experiment is finished.
Meanwhile, the three-way structure 2 is provided with the one-way valve 6, so that the back suction of the filter flask 3 can not be caused even if the vacuum pump 1 is directly turned off.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (2)
1. The utility model provides a prevent broken hole of filter paper and suction filtration device of suck-back which characterized in that: including vacuum pump (1), tee bend structure (2) and buchner flask (3), the left end and vacuum pump (1) intercommunication of tee bend structure (2), the right-hand member and buchner flask (3) intercommunication of tee bend structure (2), funnel (4) are installed on buchner flask (3) upper portion, the upper end exit of tee bend structure (2) is provided with block structure (5), it has a plurality of micropores (8) to open on block structure (5), is provided with micropore end cap (9) that can dismantle in micropore (8).
2. The suction filtration device for preventing filter paper from being broken and sucked backwards as claimed in claim 1, wherein: the three-way structure (2) is internally provided with a one-way valve (6), and the one-way valve (6) is arranged at one end connected with the filter flask (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020788062.4U CN212731250U (en) | 2020-05-13 | 2020-05-13 | Prevent broken hole of filter paper and suction filtration device of suck-back |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020788062.4U CN212731250U (en) | 2020-05-13 | 2020-05-13 | Prevent broken hole of filter paper and suction filtration device of suck-back |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212731250U true CN212731250U (en) | 2021-03-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020788062.4U Active CN212731250U (en) | 2020-05-13 | 2020-05-13 | Prevent broken hole of filter paper and suction filtration device of suck-back |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212731250U (en) |
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2020
- 2020-05-13 CN CN202020788062.4U patent/CN212731250U/en active Active
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