CN108168950A - Sample liquid definite value sampling apparatus based on magnetic conductance sensing - Google Patents
Sample liquid definite value sampling apparatus based on magnetic conductance sensing Download PDFInfo
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- CN108168950A CN108168950A CN201810031250.XA CN201810031250A CN108168950A CN 108168950 A CN108168950 A CN 108168950A CN 201810031250 A CN201810031250 A CN 201810031250A CN 108168950 A CN108168950 A CN 108168950A
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- Prior art keywords
- sample
- magnetic conductance
- sample liquid
- definite value
- channel
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
Abstract
The present invention provides it is a kind of based on magnetic conductance sensing sample liquid definite value sampling apparatus, including：Sample liquid；Container, for accommodating the sample liquid after definite value sampling；Sample channel, for connecting sample liquid and container, the supply unit for providing conveying power and the threeway sampling valve for controlling sample channel on and off are provided on the sample channel, wherein, the container is selectively connected by the threeway sampling valve with the sample channel；Rating components, the rating components include control unit and several magnetic conductance pole plates for being arranged on sample channel both sides, the magnetic conductance pole plate is between threeway sampling valve and supply unit, the magnetic conductance pole plate is connected by magnetic conductance circuit with control unit, and described control unit controls the threeway sample introduction Vavle switching.
Description
Technical field
The present invention relates to definite value samplings in liquid sample sampling process more particularly to the sample liquid definite value in Water Test Kits to adopt
Sampling device.
Background technology
Water quality online analyzer device is a kind of water quality monitoring tool, can be reached automatically to the real-time prison of water quality parameters
It surveys.It belongs to a field interdisciplinary, which has merged the technology of the profession such as physics, chemistry, machinery, electronic information.Meter
It is a component important in water quality online analyzer to measure component, for example during survey COD concentration, the effect of metering unit is accurately to control
The amount of potassium bichromate needed for system and water sample etc., potassium bichromate is by aerobic substance, reducing substances and organic matter in water sample etc.
The solution that can be restored by iron ammonium sulfate is oxidized to, then absorbance is measured to calculate the concentration of sample by colorimetric method.Therefore, such as
The proportioning of what accurate control reagent, it can directly influence the measurement result of final solution concentration.
Water-quality sampler is generally sampled using peristaltic pump, when the existing definite value method of sampling is generally by the rotation of peristaltic pump
Between and known mass flow calculate.But peristaltic pump is in the process of running, due to pump line aging etc., flow velocity can with when
Between fail, sampled so as to cause definite value inaccurate.
In order to overcome the above problem, number of patent application is the patent name of " 2017107515816 " for " sample liquid definite value samples
The patent of device and method ", which disclose a kind of method of automatic acquisition definite value sample liquid, which includes sample liquid,
Container, sample channel and the sensor being made of several photoelectrical couplers, the technical solution with sampling valve and photoelectrical coupler it
Between sample channel fixed volume be definite value, obtain the definite value sample liquid in this section of sample channel.The technical solution solves sample liquid certainly
The problem of dynamic definite value sampling, but in the technical solution, the value that can be sampled is discrete type, can only obtain and originally set
Sample channel in sampling valve to this section between photoelectrical coupler definite value, to obtain the sample liquid of other magnitudes, the technical side
Case can not be realized, therefore the limitation of the technical solution is larger.
Invention content
The purpose of the present invention is being directed to existing technology, there are the above problems, it is proposed that one kind can continuous type definite value acquisition sample
The sample liquid definite value sampler based on magnetic conductance sensing of liquid.
The purpose of the present invention can be realized by following technical proposal：
A kind of sample liquid definite value sampling apparatus based on magnetic conductance sensing, including：
Sample liquid；
Container, for accommodating the sample liquid after definite value sampling；
Sample channel for connecting sample liquid and container, is provided with to provide the defeated of conveying power on the sample channel
Send unit and the threeway sampling valve for controlling sample channel on and off, wherein, the container by the threeway into
Sample valve is selectively connected with the sample channel；
Rating components, the rating components include control unit and several magnetic conductance pole plates for being arranged on sample channel both sides,
For the magnetic conductance pole plate between threeway sampling valve and supply unit, the magnetic conductance pole plate passes through magnetic conductance circuit and control unit phase
Even, described control unit controls the threeway sample introduction Vavle switching.
Preferably, the magnetic conductance circuit includes several capacitances and several inductance, the capacitance and inductance with the magnetic
Lead pole plate parallel connection.
Preferably, the sample liquid definite value sampling apparatus further includes drain unit, the drain unit is used to discharge sample introduction
Remaining waste in pipeline.
Preferably, the input end of the sample channel is provided with multiple-way valve, the multiple-way valve connects a variety of sample liquids, described
Multiple-way valve is wherein connected with distilled water reagent bottle on channel all the way and forms the drain unit.
Preferably, it is connected with waste liquid bottle on the channel all the way of the multiple-way valve.
Preferably, the supply unit is peristaltic pump.
Compared with prior art, the present invention has following technological merit：
Sample liquid, which flows through magnetic conductance plate regions any position, in the present invention can generate a unique signal, and control unit can
To preset the sample liquid numerical value to be obtained and the corresponding signal value of sample liquid numerical value be preset as threshold values, during sampling, magnetic conductance circuit
Generate the i.e. corresponding as required sample liquid numerical value obtained of the sample liquid numerical value for illustrating to end at threeway sampling valve of the signal, control unit
Threeway sampling valve is controlled to close sample channel, in this way, realizing the sampling of sample liquid continuous type fits automatically.
Description of the drawings
Fig. 1 is the structure diagram of the present invention；
Fig. 2 is the structure diagram of magnetic conductance circuit in the present invention.
Specific embodiment
The following is specific embodiments of the present invention and with reference to attached drawing, technical scheme of the present invention is further described,
But the present invention is not limited to these embodiments.
Fig. 1 has schematically given a kind of structure of sample liquid definite value sampling apparatus sensed based on magnetic conductance provided in this embodiment
Figure, as described in Figure 1, the present apparatus includes：
Sample liquid；
Container 60, for accommodating the sample liquid after definite value sampling；
Sample channel 80 for connecting sample liquid and container 60, is provided with dynamic for providing conveying on the sample channel 80
The supply unit of power and the threeway sampling valve 50 for controlling 80 on and off of sample channel, wherein, the container 60 is logical
The threeway sampling valve 50 is crossed to connect with 80 selectivity of sample channel；
Rating components, the rating components include control unit and several magnetic conductance pole plates for being arranged on 80 both sides of sample channel
70, the magnetic conductance pole plate 70 between threeway sampling valve 50 and supply unit, the magnetic conductance pole plate 70 by magnetic conductance circuit with
Control unit is connected, and described control unit controls the threeway sampling valve 50 to switch.
Magnetic conductance pole plate 70 is arranged on 80 both sides of sample channel, and magnetic conductance pole plate 70 is connected with magnetic conductance circuit, when sample channel 80
During interior sample introduction, sample liquid, which flows through 70 region of magnetic conductance pole plate, is changed the medium between two pieces of magnetic conductance pole plates 70, Jin Eryin
The voltage for playing 70 both ends of magnetic conductance pole plate changes, and therefore, sample liquid flows through each position in 70 region of magnetic conductance pole plate makes magnetic conductance accordingly
Circuit generates corresponding voltage, and based on this, threeway sampling valve 50 can be obtained to magnetic conductance pole plate by the sensing of magnetic conductance pole plate 70
The sample liquid of any length section in 70 regions, it is achieved thereby that fits automatically continuous type samples.Specific sampling process is as follows：
In sampling, first the numerical value of sampling needed for input, control unit correspond to corresponding voltage signal automatically, and sample liquid flows into
When 70 region of magnetic conductance pole plate reaches the value, magnetic conductance pole plate 70 reaches preset voltage value and feedback signal is to control unit, control
Unit closes sample channel 80 afterwards, and the definite value sample liquid of interception is made to be temporarily retained in sample channel 80.
Container 60 is connected by threeway sampling valve 50 with sample channel 80, in the present embodiment, control unit switching three
Logical sampling valve 50 causes container 60 to be connected with sample channel 80 while sample channel 80 is controlled to close, at this point, control unit control
Supply unit reverse push processed send the definite value sample liquid in sample channel 80, is sent in container 60, completes a definite value sampling.
Magnetic conductance pole plate 70 is transferred to control unit because of the voltage change that sample liquid flows through generation by magnetic conductance circuit.Such as Fig. 2 institutes
Show, magnetic conductance circuit includes several inductance 72 and several capacitances 71, and inductance 72 and capacitance 71 are in parallel with magnetic conductance pole plate 70, inductance 72
Effect be the corresponding generation voltage change when 70 capacitance of magnetic conductance pole plate changes so that sample liquid enters 70th area of magnetic conductance pole plate
Voltage variety can be generated behind domain and obtains inductive signal.In actual application, the sample into 70 region of magnetic conductance pole plate
The variable quantity of liquid quantity is smaller, and the voltage change at 70 both ends of magnetic conductance pole plate is smaller, to improve the precision of sampling it is necessary to improve control
Sensitivity of the unit for 70 both end voltage variation sensing of magnetic conductance pole plate.
It is in parallel with magnetic conductance pole plate 70 by several capacitances 71 in the present embodiment, to the voltage value at 70 both ends of magnetic conductance pole plate
It is amplified so that the induction sensitivity of control unit improves, and the result of sampling is more accurate.
In the present embodiment, sample channel 80 is after single injected sampling, and occasional is attached with residual on the inner wall of sample channel 80
Liquid, when the viscosity of sample liquid is higher, the residual liquid probability of occurrence increase in sample channel 80.The residual liquid on the one hand meeting
It is merged with the sample liquid of next sample introduction, the sample liquid purity of next sample introduction is caused to be lower, on the other hand, when residual liquid is located just at magnetic
When leading 70 region of pole plate, 70 Region Medium of magnetic conductance pole plate can naturally be caused to change, the sensing of magnetic conductance pole plate 70 is generated
Interference causes sampling inaccurate.Therefore, the sample liquid definite value sampling apparatus of the present embodiment is additionally provided with drain unit, the drain
Unit can discharge the residual liquid in sample channel 80.
Specifically, drain unit includes a distilled water reagent bottle 20, distilled water reagent bottle 20 passes through multiple-way valve 40 and sample introduction
80 selectivity connection of pipeline.When carrying out drain cleaning, control unit switching multiple-way valve 40 makes sample channel 80 and distilled water reagent
Bottle 20 connect, supply unit extract distilled water enter in sample channel 80 come to the residual liquid adhered on sample channel 80 into
Row blended absorbent reaches the mother's of cleaning.
Further, waste liquid bottle 30 is connected on the channel all the way of multiple-way valve 40, in the present embodiment, the cleaning of drain unit
The waste liquid of sample channel generation after 80s can selectivity be sent in container 60 as solvent, waste liquid bottle can also be sent to
Reservation process in 30.It is to be herein pointed out distilled water and residual liquid are mixed into the waste liquid generated as a part of solvent
In use, need the dosage of accurate distilled water.In the present embodiment, it may be used and obtain the method for definite value sample liquid to obtain definite value
Distilled water.
Further, in the present embodiment, other channels of multiple-way valve 40 can connect a variety of sample liquid storing bottles 10, so as to make
The present apparatus can obtain a variety of sample liquids with definite value.
Further, in the present embodiment, supply unit preferably selects peristaltic pump 90, and peristaltic pump 90 can carry out positive pumping
It takes or reversely pushes, the present apparatus can be completed very well and carry out the work that sample liquid is quantitative and samples.
The method of sampling step of the sample liquid definite value sampling apparatus of the present embodiment is as follows：
A1, issuing an order to control unit makes it obtain the required value a sampled, when control unit converts to obtain sampling a values
Magnetic conductance circuit both ends for voltage value b, control unit set sample channel closing threshold values as b；
A2, control unit control supply unit extract sample liquid, and sample liquid, which flows through, causes magnetic conductance circuit voltage to become at magnetic conductance pole plate
Change, when magnetic conductance circuit voltage reaches threshold values b, control unit control threeway sample introduction Vavle switching closes sample channel and makes sample feeding pipe
Road and reservoir；
A3, control unit control peristaltic pump rotate backward, and the definite value sample liquid in sample channel is pushed into container and is completed
Sampling.
In addition, before A1 steps, can distilled water be obtained by distilled water trial jar, start supply unit distilled water is primary
By each sensor, sample channel is cleaned, drives away the residual sample liquid in residual sample channel.
Further, before A1 steps, B1 steps are repeated several times to ensure the cleaning of sample channel.
Specific embodiment described herein is only an example for the spirit of the invention.Technology belonging to the present invention is led
The technical staff in domain can do various modifications or additions to described specific embodiment or replace in a similar way
In generation, however, it does not deviate from the spirit of the invention or beyond the scope of the appended claims.
Claims (6)
1. a kind of sample liquid definite value sampling apparatus based on magnetic conductance sensing, which is characterized in that including：
Sample liquid；
Container, for accommodating the sample liquid after definite value sampling；
Sample channel for connecting sample liquid and container, is provided with the conveying list for providing conveying power on the sample channel
Member and the threeway sampling valve for controlling sample channel on and off, wherein, the container passes through the threeway sampling valve
It is selectively connected with the sample channel；
Rating components, the rating components include control unit and several magnetic conductance pole plates for being arranged on sample channel both sides, described
Between threeway sampling valve and supply unit, the magnetic conductance pole plate is connected magnetic conductance pole plate by magnetic conductance circuit with control unit,
Described control unit controls the threeway sample introduction Vavle switching.
2. sample liquid definite value sampling apparatus according to claim 1, which is characterized in that the magnetic conductance circuit includes several capacitances
With several inductance, the capacitance and inductance are in parallel with the magnetic conductance pole plate.
3. sample liquid definite value sampling apparatus according to claim 1, which is characterized in that the sample liquid definite value sampling apparatus also wraps
Drain unit is included, the drain unit is used to discharge the remaining waste in sample channel.
4. sample liquid definite value sampling apparatus according to claim 3, which is characterized in that the input end setting of the sample channel
There is a multiple-way valve, the multiple-way valve connects a variety of sample liquids, and the multiple-way valve is wherein connected with distilled water reagent bottle on channel all the way
Form the drain unit.
5. sample liquid definite value sampling apparatus according to claim 4, which is characterized in that connect on the channel all the way of the multiple-way valve
It is connected to waste liquid bottle.
6. sample liquid definite value sampling apparatus according to claim 1, which is characterized in that the supply unit is peristaltic pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810031250.XA CN108168950A (en) | 2018-01-12 | 2018-01-12 | Sample liquid definite value sampling apparatus based on magnetic conductance sensing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810031250.XA CN108168950A (en) | 2018-01-12 | 2018-01-12 | Sample liquid definite value sampling apparatus based on magnetic conductance sensing |
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| CN108168950A true CN108168950A (en) | 2018-06-15 |
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| CN201810031250.XA Pending CN108168950A (en) | 2018-01-12 | 2018-01-12 | Sample liquid definite value sampling apparatus based on magnetic conductance sensing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110879160A (en) * | 2019-12-09 | 2020-03-13 | 安徽一诺青春工业设计有限公司 | Adjustable water body detection sampling device based on pressure change principle |
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