CN208206991U - A kind of liquid detection device in active immunity work station - Google Patents
A kind of liquid detection device in active immunity work station Download PDFInfo
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- CN208206991U CN208206991U CN201820805401.8U CN201820805401U CN208206991U CN 208206991 U CN208206991 U CN 208206991U CN 201820805401 U CN201820805401 U CN 201820805401U CN 208206991 U CN208206991 U CN 208206991U
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- plunger pump
- sampling
- pipeline
- solenoid valve
- connection
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Abstract
A kind of liquid detection device in active immunity work station, belong to medical test, food testing, biological experiment equipment technical field, it is characterized in that: being equipped with plunger pump on sampling arm crossbeam, plunger pump is fixed with sampling arm crossbeam, solenoid valve is connected with a connecting pin of plunger pump housing, it is fixed by screws on plunger pump, sampling head bindiny mechanism is perpendicularly fixed at sampling arm crossbeam, sampling head bindiny mechanism is connect with plunger pump by hose, has pressure sensor to be connected in pipeline in the pipeline of connection.Beneficial effect is: 1, avoiding the risk of cross contamination.2, the consumables cost of instrument is reduced.3, plunger pump is directly fixed on sampling crossbeam, shortens the connection length of tube with sampling head bindiny mechanism, improves sampling precision.4, using solenoid valve control pipeline and air communication, loine pressure is directly returned to initial air pressure after plunger pump is opened, and will not cause the pressure change in pipeline because of the reset of plunger pump.
Description
Technical field
The utility model belongs to medical test, food testing, biological experiment equipment technical field.
Background technique
During medical test, food testing, biological experiment, ELISA and CLIA are the normal of clinical labororatory's progress
Advise the method for inspection, current checkout procedure is, the addition of sample and reagent is carried out on 96 orifice plates, be then incubated for, board-washing,
The work such as DATA REASONING, the link workload maximum of this and reagent of sample-adding, is loaded precision and position is accurate in the whole process
Degree plays critical effect in entire detection process.This and reagent of domestic sample-adding mainly departure work and automatic sample two at present
Kind method.Since condition limits, sample-adding process there are load position and adds middle-size and small-size medical institutions of China all by having been manually done
Phenomena such as sample trueness error, influence testing result.And there is somewhat expensives, consumables cost for the automatic sample-adding system of import
The high, drawbacks such as volume is big, complicated for operation, maintenance cost is high, hardly result in universal.
Sampling mechanism is core in automatic sample-adding system, and accuracy is not in terms of imbibition, liquid separation for existing domestic equipment
Height, and overseas equipment is expensive.Furthermore existing loading device is there is also cross contamination between sample is easy to appear, sternly
Ghost image rings the quality for examining work.
Utility model content
The purpose of this utility model is: providing the liquid detection device in a kind of active immunity work station, it can be improved
The sample-adding precision and load position accuracy of automatic sample-adding system, while using common disposable TIP head, testing cost is reduced,
Overcome cross contamination.Sampling mechanism at lower cost realizes the work of the high speed, high quality of automatic sampling system.
The technical solution of the utility model is: plunger pump is equipped on sampling arm crossbeam, plunger pump and sampling arm are horizontal
Beam is fixed, and solenoid valve is connected with a connecting pin of plunger pump housing, is fixed by screws on plunger pump, sampling head connection
Mechanism is perpendicularly fixed at sampling arm crossbeam, and sampling head bindiny mechanism is connect with plunger pump by hose, has in the pipeline of connection
Pressure sensor is connected in pipeline.
Solenoid valve is two-way valve, and wherein one end realizes the connection of plunger pump airtight cavity and solenoid valve by connection hose；
The other end is by the connection of connection hose and air, and when solenoid valve is closed, plunger pump airtight cavity and air are disconnected, and works as electromagnetism
When valve is opened, plunger pump airtight cavity and air communication.
There are two connectors for pressure sensor, are connected in plunger pump airtight cavity and sampling head bindiny mechanism, use
Carry out the pressure in signal piping.
Sampling head bindiny mechanism is conical tube.
The beneficial effects of the utility model are: 1, avoid at present the steel needle employed in most of instruments sampling brought
Cross contamination risk.2, the disposable conductive plastic sampling head for relying primarily on import at present is avoided using common sampling head
Expensive price (price of conductive sampling head is ten times of conventional needle or so), reduce the consumables cost of instrument.3, column
Plug pump is directly fixed on sampling crossbeam, shortens the connection length of tube with sampling head bindiny mechanism, improves sampling precision.4, it adopts
With solenoid valve control piper and air communication, loine pressure is directly returned to initial air pressure after plunger pump is opened, will not
Because the reset of plunger pump causes the pressure change in pipeline.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the flow chart of the Application Example of the utility model；
Fig. 3 is the level detection analogue signal amplitude-displacement waveform diagram of an embodiment of the present invention.
Specific embodiment
The utility model is described further with reference to the accompanying drawing:
As shown in Figure 1,1 stepper motor；2 linear transmission mechanisms；3 plunger pump housings；4 plunger pump rubber stoppers；5 solenoid valves；6
Plunger pump airtight cavity；7 connection hoses realize the connection of plunger pump airtight cavity and solenoid valve；8 connection hoses, realize solenoid valve
With the connection of air；9 connection hoses, realize the connection of plunger pump airtight cavity and pressure sensor；10 pressure sensors；11 connect
Hose is connect, the connection of pressure sensor Yu sampling head bindiny mechanism is realized；12 sampling head bindiny mechanisms；13 disposable samplings
Head；14 samples to be tested；15 sample tubes；16 sampling arm crossbeams.
The utility model can be used for detecting the detecting liquid level mechanism of liquid level, the liquid for maintaining the gas in air cavity constant
Road wiper mechanism, for controlling the control system of detecting liquid level mechanism and fluid path wiper mechanism, the detecting liquid level mechanism, institute
Fluid path wiper mechanism is stated to be connected with the control system respectively.
Specifically, it as shown in Figure 1, all components are all mounted on sampling arm crossbeam 16, is moved down on sampling arm crossbeam 16
Dynamic and rotation, to drive whole device to be moved.The detecting liquid level mechanism 1 is stepper motor, passes through turning for stepper motor 1
It is dynamic to drive linear transmission mechanism 2, to realize the movement of plunger pump rubber stopper 4.The movement of plunger pump rubber stopper 4 causes column
The volume change of plug pump airtight cavity 6.The volume change of plunger pump airtight cavity 6 realize by connection pipeline carry out inhale sample and
Setting-out.
The solenoid valve 5 is two-way valve, and wherein plunger pump airtight cavity and solenoid valve are realized by connection hose 7 in one end
Connection.The other end is by the connection of connection hose 8 and air, and when solenoid valve is closed, plunger pump airtight cavity 6 and air are disconnected
It opens, when solenoid valve 5 is opened, plunger pump airtight cavity 6 and air communication.
There are two connectors for the pressure sensor 10, are connected to plunger pump airtight cavity 6 and connect with sampling head
In mechanism 12, for the pressure in signal piping.
The positive upper end of sample tube 15, when being detected, sampling arm crossbeam are in the original state whole device of detection
16 drive whole device decline, move closer to sample to be tested 14.It carries out the movement of stepper motor 15 simultaneously and passes through pressure sensing
Device 10 carries out signal detection.When by software detection to liquid level, 16 stop motion of sampling arm crossbeam, disposable sampling head at this time
It 13 lower end should be below the liquid level of sample to be tested 14.Solenoid valve 5 is opened later, and stepper motor 15 continues to run drive column
Plug pump rubber stopper 4 moves to the bottom of plunger pump airtight cavity 6, be then shut off solenoid valve 5, at this time plunger pump airtight cavity 6
Volume is minimum.Detecting liquid level terminates, and can carry out inhaling sample operation.
The utility model additionally provides a kind of detection method based on liquid level sensor described above, wherein including with
Lower step:
Crossbeam moves down S1 distance to plunger pump operation simultaneously in the utility model, needs to be carried out according to different sample tubes
Setting.
Threshold value △ V in the utility model needs to be set according to different use environment and specific model.
The utility model also provides a kind of level detection analog signal width of the concrete application embodiment of liquid level checking method
Degree-displacement waveform diagram, as shown in figure 3, wherein remain static in the mechanism of △ t1 period entirety, the pressure of detection
Value is 0.51V or so.The △ t2 period is plunger pump operation, while crossbeam runs down the stage, due to plunger pump closed chamber
The volume of body 6 becomes smaller, and has gas to be uniformly discharged in pipeline, and the pressure in pipeline is 0.55V or so at this time.The △ t3 period is one
Secondary property sampling head 13, enters liquid level hereinafter, plunger pump continues to run at this time, and pressure becomes larger, and is 0.58V or so.The △ t4 time
Section is that solenoid valve 5 is opened, and plunger pump airtight cavity and air communication, the pressure recovery that pressure sensor 10 detects arrive at this time
0.51V or so.
The utility model additionally provides a kind of flow chart of the Application Example of liquid level checking method, as shown in Fig. 2, described
Method includes:
Step a1, start, execute step a2 later;
Step a2, stepper motor 1 starts turning, and plunger pump airtight cavity becomes smaller, by connection hose 9, pressure sensor 10,
The pressure connected in the pipeline of hose 11, sampling head bindiny mechanism 12, the composition of disposable sampling head 13 generates variation.Initial stage
Loine pressure is unstable, and crossbeam moves along the Z direction, moves to execution step a3 after S1 distance；
Step a3, the pressure value V1 of pressure sensor acquisition herein, executes step a4 later；
Step a4, crossbeam is moved to Z-direction simultaneously for piston pump motor movement, while acquiring pressure value at regular intervals
V2 executes step a5 later；
Step a5, judge whether V2- V1 is greater than threshold value △ V, if it is a6 is thened follow the steps, if not, thening follow the steps
a4；
Step a6, liquid level is detected, output detects liquid level signal, executes step a7 later；
Step a7, solenoid valve 5 is opened, stepper motor, which continues to run, drives plunger pump airtight cavity to bottom.It is then shut off
Solenoid valve 5.
Step a7, detecting liquid level terminates.
In conclusion the utility model provides a kind of liquid level sensor and detection method, described device includes being used for
The detecting liquid level mechanism of liquid level is detected, the fluid path wiper mechanism for maintaining the gas in air cavity constant is visited for controlling liquid level
Survey mechanism and fluid path wiper mechanism control system, the detecting liquid level mechanism, the fluid path wiper mechanism respectively with the control
System processed is connected.The method that the utility model carries out level detection by the analysis to pressure change in pipette, provides one
A structure is simple, stablizes, the liquid level checking method and device that accuracy and reliability is high, improves the sensitivity of level detection.
Claims (4)
1. the liquid detection device in a kind of active immunity work station, it is characterized in that: being equipped with plunger on sampling arm crossbeam
Pump, plunger pump are fixed with sampling arm crossbeam, and solenoid valve is connected with a connecting pin of plunger pump housing, is fixed by screws in
On plunger pump, sampling head bindiny mechanism is perpendicularly fixed at sampling arm crossbeam, sampling head bindiny mechanism and plunger pump and is connected by hose
It connects, there is pressure sensor to be connected in pipeline in the pipeline of connection.
2. the liquid detection device in a kind of active immunity work station as described in claim 1, it is characterized in that: solenoid valve is double
Port valve, wherein one end realizes the connection of plunger pump airtight cavity and solenoid valve by connection hose, and the other end passes through connection hose
With the connection of air.
3. the liquid detection device in a kind of active immunity work station as described in claim 1, it is characterized in that: pressure sensor
There are two connectors, are connected in plunger pump airtight cavity and sampling head bindiny mechanism, for the pressure in signal piping.
4. the liquid detection device in a kind of active immunity work station as described in claim 1, it is characterized in that: sampling head connects
Mechanism is conical tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820805401.8U CN208206991U (en) | 2018-05-29 | 2018-05-29 | A kind of liquid detection device in active immunity work station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820805401.8U CN208206991U (en) | 2018-05-29 | 2018-05-29 | A kind of liquid detection device in active immunity work station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208206991U true CN208206991U (en) | 2018-12-07 |
Family
ID=64515847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820805401.8U Expired - Fee Related CN208206991U (en) | 2018-05-29 | 2018-05-29 | A kind of liquid detection device in active immunity work station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208206991U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108982893A (en) * | 2018-05-29 | 2018-12-11 | 长春比特医疗仪器有限公司 | A kind of liquid detection device in active immunity work station |
-
2018
- 2018-05-29 CN CN201820805401.8U patent/CN208206991U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108982893A (en) * | 2018-05-29 | 2018-12-11 | 长春比特医疗仪器有限公司 | A kind of liquid detection device in active immunity work station |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181207 |
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| CF01 | Termination of patent right due to non-payment of annual fee |