CN216778498U - Film passing device for physical and chemical samples - Google Patents
Film passing device for physical and chemical samples Download PDFInfo
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- CN216778498U CN216778498U CN202220400407.3U CN202220400407U CN216778498U CN 216778498 U CN216778498 U CN 216778498U CN 202220400407 U CN202220400407 U CN 202220400407U CN 216778498 U CN216778498 U CN 216778498U
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Abstract
The utility model discloses a physicochemical sample membrane passing device which comprises a liquid adding needle, a liquid collecting pipe, a vacuum device, a pressurizing device, a filter membrane and a pressure sensor, wherein the liquid adding needle comprises an outlet end and an inlet end which are mutually communicated, one end of the liquid collecting pipe is communicated to the outlet end, the other end of the liquid collecting pipe is alternatively communicated to the vacuum device or the pressurizing device, so that negative pressure or positive pressure is formed in the liquid adding needle and the liquid collecting pipe, when the liquid collecting pipe is communicated to the pressurizing device, the filter membrane is arranged at the inlet end, and the pressure sensor is arranged between the pressurizing device and the liquid collecting pipe, so as to detect the air pressure between the liquid collecting pipe and the pressurizing device. The utility model can automatically judge the blockage of the filter membrane in the process of filtering and transferring the sample liquid.
Description
Technical Field
The utility model relates to the technical field of experimental instruments, in particular to a physicochemical sample membrane passing device.
Background
At present in the pre-treatment process of rationalization, laboratory operating personnel uses the interior appearance liquid of hand-held type pipettor or automatic liquid feeding equipment extraction sample tube usually, then insert the filter membrane with the pipettor, beat out the appearance liquid of extraction in the pipettor again, appearance liquid gets into the collecting pipe after the filter membrane filters, this moment accomplish the filtration transfer process to the interior appearance liquid of sample tube, in filtering process, because contain impurity in the appearance liquid, block up the filter membrane easily, the filter membrane blocks up the back, influence filter time, perhaps can not accomplish the filtration, need the artifical judgement filter membrane of operating personnel whether have the jam, the operation is troublesome, low efficiency.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a physicochemical sample membrane-passing device, which overcomes the defects and automatically judges the blockage of a filter membrane in the process of filtering and transferring sample liquid.
In order to achieve the above purpose, the solution of the utility model is: the utility model provides a membrane device is crossed to physics and chemistry sample, includes liquid feeding needle, collector tube, vacuum apparatus, supercharging device, filter membrane, pressure sensor, the liquid feeding needle is including the exit end, the entry end that switch on each other, collector tube one end switches on to the exit end, the other end alternative switch on to vacuum apparatus or supercharging device, so that the liquid feeding needle with form negative pressure or malleation in the collector tube, the collector tube switches on to during the supercharging device, the filter membrane sets up the entry end, pressure sensor sets up supercharging device with between the collector tube, in order to detect the collector tube extremely atmospheric pressure between the supercharging device.
Furthermore, a three-way switching valve is arranged among the liquid collecting pipe, the vacuum device and the supercharging device, the three-way switching valve is provided with a first valve port, a second valve port and a third valve port, the other end of the liquid collecting pipe is communicated with the first valve port, the vacuum device is communicated with the second valve port, the supercharging device is communicated with the third valve port, and the three-way switching valve switches and communicates the first valve port to the second valve port or the third valve port so that the other end of the liquid collecting pipe is selectively communicated with the vacuum device or the supercharging device.
Further, the pressure sensor is disposed between the boosting device and the third port.
Furthermore, the pressure sensor, the supercharging device and the third valve port are communicated with each other through a three-way joint.
Further, the pressurizing device is a gas source device for releasing gas.
Further, the vacuum device is a syringe pump.
After the scheme is adopted, the utility model has the beneficial effects that: the liquid feeding needle comprises an outlet end and an inlet end which are mutually communicated, one end of the liquid collecting tube is communicated to the outlet end, the other end of the liquid collecting tube is alternatively communicated to the vacuum device or the supercharging device, so that negative pressure or positive pressure is formed in the liquid feeding needle and the liquid collecting tube, when the liquid collecting tube is communicated to the vacuum device, the inlet end is inserted into sample liquid, the sample liquid can be sucked into the liquid collecting tube through the liquid feeding needle, when the liquid collecting tube is communicated to the supercharging device, the filter membrane is arranged at the inlet end, at the moment, the sample liquid in the liquid collecting needle and the liquid collecting tube is filtered by the filter membrane from the inlet end and then discharged, the pressure sensor is arranged between the supercharging device and the liquid collecting tube to detect the air pressure between the liquid collecting tube and the supercharging device, when the pressure sensor detects that the air pressure is greater than a preset value, the blockage of the sample liquid when the sample liquid is discharged from the inlet end can be judged, thereby judging the clogging of the filter membrane.
Drawings
FIG. 1 is a schematic view of a sample liquid sucking structure according to the present invention;
FIG. 2 is a schematic view showing the structure of the present invention when a sample liquid is discharged and filtered.
Description of reference numerals: 1-liquid feeding needle, 2-liquid collecting tube, 3-vacuum device, 4-pressurizing device, 5-filter membrane, 6-pressure sensor, 7-outlet end, 8-inlet end, 9-three-way switching valve, 10-first valve port, 11-second valve port, 12-third valve port, 13-three-way joint, 14-piston, 15-cylinder, 16-pneumatic chamber, 17-sample tube and 18-receiving tube.
Detailed Description
The utility model is described in detail below with reference to the accompanying drawings and specific embodiments.
The utility model provides a physicochemical sample membrane device, as shown in fig. 1 and fig. 2, comprising a liquid feeding needle 1, a liquid collecting tube 2, a vacuum device 3, a supercharging device 4, a filter membrane 5 and a pressure sensor 6, wherein the liquid feeding needle 1 comprises an outlet end 7 and an inlet end 8 which are mutually communicated, namely, the liquid feeding needle 1 is in a needle tube shape with two open ends, the liquid collecting tube 2 is any existing tube with two open ends, one end of the liquid collecting tube 2 is communicated to the outlet end 7, the supercharging device 4 is any existing air source device capable of releasing air, the vacuum device 3 is any existing injection pump and can also be other devices capable of providing negative pressure, in the embodiment, the vacuum device 3 comprises a piston 14 and a cylinder 15, the piston 14 is arranged in the cylinder 15 in a sliding manner, and a pneumatic cavity 16 is formed between the piston 14 and the cylinder 15 in a sealing manner, in the process of outward sliding of the piston 14, the air pressure chamber 16 is increased to form a negative pressure, a three-way switching valve 9 is disposed between the liquid collecting tube 2, the vacuum device 3, and the pressure boosting device 4, the three-way switching valve 9 is provided with a first valve port 10, a second valve port 11, and a third valve port 12, the other end of the liquid collecting tube 2 is communicated with the first valve port 10, the vacuum device 3 is communicated with the second valve port 11, the pressure boosting device 4 is communicated with the third valve port 12, the three-way switching valve 9 switches and communicates the first valve port 10 to the second valve port 11 or the third valve port 12, so that the other end of the liquid collecting tube 2 is selectively communicated with the vacuum device 3 or the pressure boosting device 4, the three-way switching valve 9 is the prior art, which is not specifically described in this embodiment, so that the negative pressure or positive pressure is formed in the liquid feeding needle 1 and the liquid feeding tube 2, the filter membrane 5 is detachably disposed at the inlet end 8, and may be any detachable connection structure such as a screw connection structure, without specific limitation, when the liquid collecting tube 2 is conducted to the pressure boosting device 4, the filter membrane 5 is disposed at the inlet end 8, when the liquid collecting tube 2 is conducted to the vacuum device 3, the filter membrane 5 is detached, and the pressure sensor 6 is disposed between the pressure boosting device 4 and the liquid collecting tube 2 to detect the air pressure between the liquid collecting tube 2 and the pressure boosting device 4, in this embodiment, the pressure sensor 6 is disposed between the pressure boosting device 4 and the third valve port 12, and the pressure sensor 6, the pressure boosting device 4, and the third valve port 12 are conducted to each other through a three-way joint 13.
When the device works, firstly, an inlet end 8 of a liquid feeding needle 1 is inserted into a sample tube 17 filled with sample liquid, the three-way switching valve 9 is switched, the liquid collecting tube 2 is communicated with the vacuum device 3, the vacuum device 3 is started, negative pressure is formed in the liquid feeding needle 1 and the liquid collecting tube 2 at the moment, the sample liquid in the sample tube 17 is sucked into the liquid feeding needle 1 and the liquid collecting tube 2, after the sample liquid is sucked, the liquid feeding needle 1 is taken out of the sample tube 17, then a filter membrane 5 is installed at the inlet end 8 of the liquid feeding needle 1, the inlet end 8 of the liquid feeding needle 1 is inserted into a receiving tube 18, the three-way switching valve 9 is switched at the moment, the liquid collecting tube 2 is communicated with the pressurizing device 4, the pressurizing device 4 is started, and positive pressure is formed in the liquid feeding needle 1 and the liquid collecting tube 2 at the moment, at this moment, under the push of air pressure, the sample liquid in the liquid adding needle 1 and the liquid collecting pipe 2 is discharged into the receiving pipe 18 after being filtered by the filter membrane 5 from the inlet end 8, if in the sample liquid discharging process, when the pressure sensor 6 detects that the air pressure is greater than a preset value, the sample liquid can be judged to be blocked when being discharged from the inlet end 8, so that the blockage of the filter membrane 5 is judged, and an operator is prompted to process in time.
The above description is only a preferred embodiment of the present invention and is not intended to limit the design of the present invention, and all equivalent variations that are made by the design key of the present invention will fall within the protection scope of the present invention.
Claims (6)
1. A physicochemical sample crosses membrane device which characterized in that: comprises a liquid adding needle (1), a liquid collecting pipe (2), a vacuum device (3), a supercharging device (4), a filter membrane (5) and a pressure sensor (6), the liquid adding needle (1) comprises an outlet end (7) and an inlet end (8) which are communicated with each other, one end of the liquid collecting pipe (2) is communicated with the outlet end (7), the other end is alternatively communicated with the vacuum device (3) or the pressurizing device (4), so as to form negative pressure or positive pressure in the liquid adding needle (1) and the liquid collecting pipe (2), when the liquid collecting pipe (2) is communicated with the supercharging device (4), the filter membrane (5) is arranged at the inlet end (8), the pressure sensor (6) is arranged between the supercharging device (4) and the liquid collecting pipe (2), so as to detect the air pressure between the liquid collecting pipe (2) and the supercharging device (4).
2. A physicochemical sample membrane device according to claim 1, characterized in that: a three-way switching valve (9) is arranged among the liquid collecting pipe (2), the vacuum device (3) and the supercharging device (4), the three-way switching valve (9) is provided with a first valve port (10), a second valve port (11) and a third valve port (12), the other end of the liquid collecting pipe (2) is communicated with the first valve port (10), the vacuum device (3) is communicated with the second valve port (11), the supercharging device (4) is communicated with the third valve port (12), and the three-way switching valve (9) switches and communicates the first valve port (10) to the second valve port (11) or the third valve port (12), so that the other end of the liquid collecting pipe (2) is alternatively communicated with the vacuum device (3) or the supercharging device (4).
3. A physicochemical sample membrane device according to claim 2, characterized in that: the pressure sensor (6) is arranged between the pressure boosting device (4) and the third valve port (12).
4. A physicochemical sample membrane device according to claim 2, characterized in that: the pressure sensor (6), the supercharging device (4) and the third valve port (12) are communicated with each other through a three-way joint (13).
5. A physicochemical sample membrane device according to claim 1, characterized in that: the supercharging device (4) is an air source device for releasing air.
6. A physicochemical sample membrane device according to claim 1, wherein: the vacuum device (3) is a syringe pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220400407.3U CN216778498U (en) | 2022-02-25 | 2022-02-25 | Film passing device for physical and chemical samples |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220400407.3U CN216778498U (en) | 2022-02-25 | 2022-02-25 | Film passing device for physical and chemical samples |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216778498U true CN216778498U (en) | 2022-06-21 |
Family
ID=82019060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220400407.3U Active CN216778498U (en) | 2022-02-25 | 2022-02-25 | Film passing device for physical and chemical samples |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216778498U (en) |
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2022
- 2022-02-25 CN CN202220400407.3U patent/CN216778498U/en active Active
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