CN202638048U - Liquid level tracking device for solid phrase extraction instrument - Google Patents
Liquid level tracking device for solid phrase extraction instrument Download PDFInfo
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- CN202638048U CN202638048U CN 201220285307 CN201220285307U CN202638048U CN 202638048 U CN202638048 U CN 202638048U CN 201220285307 CN201220285307 CN 201220285307 CN 201220285307 U CN201220285307 U CN 201220285307U CN 202638048 U CN202638048 U CN 202638048U
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- level sensor
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Abstract
The utility model belongs to the field of separation equipment, and provides a liquid level tracking device for a solid phrase extraction instrument. The liquid level tracking device comprises a probe connected with a pipeline and a fixing seat used for fixing the probe and is characterized in that the fixing seat is provided with a pipe joint, the probe is connected with the pipeline through the pipe joint, and a liquid level sensor and a liquid level sensor signal line are arranged on the fixing seat. A regulating hole and an elastic structure located inside the regulating hole are arranged on the fixing seat, an elastic end of the elastic structure is connected with a pipe outer wall of the probe in a contacting mode under the action of infliction of pressure, and the liquid level sensor signal line is electrically connected with the elastic structure, so that the probe and the signal line of the liquid level sensor form an electrical connection relation. The liquid level tracking device for the solid phrase extraction instrument judges a liquid level according to the principle of the capacitance method and controls the declining speed of the probe according to the declining speed of the liquid level so as to enable the probe to be always maintained on a relatively fixed position under the liquid level, and thus reduces washing workload of the probe, reduces cross contamination generated in a sample pretreatment process, is simple in probe replacement, and can be widely applied to design and manufacture fields of the solid phrase extraction instrument.
Description
Technical field
The utility model belongs to the separation equipment field, relate in particular to a kind of by the displacement or by wash-out to including the separation equipment of processing with the solid absorbent treat liquid.
Background technology
In analytical chemistry, sample pre-treatments is a very important step.
The quality of sample pre-treatments not only directly affects the final analysis result, but also the service life of meeting impact analysis instrument.
Many analytical chemistry workers have realized that the importance of sample pre-treatments, and therefore, people study, improve the method for sample pre-treatments all the time, make it more accurate and effective, succinct, quick.
Pre-treating method as chromatography---the SPE method is also just arisen at the historic moment.
SPE (Solid Phase Extraction, be called for short SPE) is a Sample Pretreatment Technique that begins to grow up mid-term from the eighties, and being combined by liquid-solid extraction and liquid chromatography technology develops.
SPE is mainly used in the separation of sample, purifies and enrichment.
The main purpose of employing SPE is to reduce the impact of sample substrate and chaff interference, improves detection sensitivity.
Along with the development of SPE law technology, the Full-automatic solid phase extraction instrument be owing to can automatically finish the processes such as preliminary treatment, loading, drip washing, wash-out of sample, and can carry out the batch process sample, so deeply be subjected to user's favor.
The operation principle of Full-automatic solid phase extraction instrument is: three groups of mechanical arms drive probes, move along X, Y, Z direction, cooperate syringe pump to finish automatic liquid-pumping and play the work that surges, thereby finish the processes such as preliminary treatment, loading, drip washing, wash-out of SPE.
According to statistics, in the whole process of chromatography, the error that sample pre-treatments produces is maximum, and up to 30%, and cross pollution is again the key factor of sample pre-treatments error.
In other words, if cross pollution can be handled well, then the error of sample pre-treatments generation will reduce greatly.
So in the Full-automatic solid phase extraction instrument, carry out the liquid level tracking means of probe, reduce contact length or the contact area of probe and sample or solution, be one of key factor that reduces cross pollution.
At present, the Full-automatic solid phase extraction instrument product that home and abroad production firm produces does not all have the liquid level following function, inserts in the motion process of sample solution at probe, directly probe is pricked the liquid level minimum point.
The result of this control probe motion mode has just caused contact length or the insertion depth of probe and sample solution, always is in the maximum state that allows mobile size/range of probe.It had both made the cleaning amount of probe greatly increase, increased again virtually the probability that cross pollution occurs between the various sample liquid, so that the error that sample pre-treatments produces increases, when serious even directly have influence on final analysis result's accuracy and reliability.
In addition, from the angle of control, by the liquid level tracking means of probe, can also judge the liquid level of sample or solvent, thereby expand the intelligent functions of whole instrument.
The utility model content
Technical problem to be solved in the utility model provides a kind of liquid level tracking means for solid-phase extracting instrument, it judges liquid level according to the electric capacity ratio juris, control the speed that probe descends according to the decrease speed of liquid level, so that probe remains at the following relatively-stationary position of liquid level, thereby alleviated the cleaning amount of probe, reduce the cross pollution that produces in the sample pretreatment process, and changed easily probe.
The technical solution of the utility model is: a kind of liquid level tracking means for solid-phase extracting instrument is provided, comprise the probe that is connected with pipeline and the holder that is used for stationary probe, it is characterized in that: at described holder pipe joint is set, described probe is connected with pipeline by pipe joint; At described holder liquid level sensor and liquid level sensor holding wire are set; At described holder adjustment hole and the elastic construction that is positioned at adjustment hole are set, the elastic tip of described elastic construction is exerted pressure to contact with the pipe outer wall of probe and is connected; Described liquid level sensor holding wire is electrically connected with elastic construction, so that consist of electrical connection between the holding wire of probe and liquid level sensor.
Concrete, described pipe joint is threaded connection mode probe is fixed on the holder.
Its described elastic construction comprises metallic screw, spring and the steel ball that is arranged in the holder adjustment hole, and the steel ball of described elastic construction is connected with the probe pressure contact.
Its described metallic screw spins through screw thread and is fixed in the adjustment hole.
Further, described liquid level sensor is through liquid level sensor holding wire, metallic screw, spring and steel ball, and consists of electrical connection between the probe.
Its described steel ball, pressure contact with the probe tube outer wall adjustablely.
Its described elastic construction is regulated by metallic screw the elastic pressure of probe.
Further, between described pipe joint and the probe, adopt screw thread or bayonet socket mode affixed.
Between described pipe joint and the holder, adopt screw thread or bayonet socket mode affixed.
Compared with the prior art, the utility model has the advantages that:
1. insert the degree of depth of liquid by the control probe, control the decrease speed of probe according to the decrease speed of liquid level, so that probe remains at the following relatively-stationary position of liquid level, thereby alleviated the cleaning amount of probe;
2. the elastic construction that is comprised of metallic screw, spring, steel ball both can allow probe be connected with the holding wire of liquid level sensor, can allow again probe conveniently take out;
3. insert the degree of depth of liquid by the control probe, reduced the cross pollution that produces in the sample pretreatment process.
Description of drawings
Fig. 1 is structural representation of the present utility model.
1 is solution among the figure, and 2 is probe, and 3 is the liquid level sensor holding wire, and 4 is screw, and 5 is screw, and 6 is liquid level sensor, and 7 is holder, and 8 is pipe joint, and 9 is pipeline, and 10 is spring, and 11 is steel ball.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described further.
Among Fig. 1, the liquid level tracking means that is used for solid-phase extracting instrument that the technical program provides, comprise the probe 2 that is connected with pipeline 9 and the holder 7 that is used for stationary probe, its inventive point is: at holder 7 pipe joint 8 is set, probe 2 is connected with pipeline 9 by pipe joint; At holder liquid level sensor 6 and sensor signal lines 3 are set; At holder adjustment hole and the elastic construction that is positioned at adjustment hole are set, the elastic tip of described elastic construction is exerted pressure to contact with the pipe outer wall of probe and is connected; Described liquid level sensor holding wire 3 is electrically connected with elastic construction, so that consist of electrical connection between the holding wire of probe and liquid level sensor.
This kind liquid level tracking means, replacing probe simple in structure is convenient.When probe extracts solution, probe tip is maintained a certain distance all the time with liquid level, and need not insert probe too dark.Like this, just reduced the cross pollution that the probe insertion depth causes.
As seen from the figure, described pipe joint is threaded connection mode and is fixed on the holder.
During actual enforcement, between described pipe joint and the probe, can adopt screw thread or bayonet socket mode affixed.
Similarly, between described pipe joint and the holder, can adopt screw thread or bayonet socket mode affixed.
Its described elastic construction comprises metallic screw 4 and 5, spring 10 and the steel ball 11 that is arranged in the holder adjustment hole, and the steel ball of described elastic construction is connected with probe tube outer wall pressure contact.
Its described metallic screw 4 or 5 spins through screw thread and is fixed in the adjustment hole.
The elastic construction that employing is comprised of metallic screw, spring, steel ball both can allow probe be connected with the holding wire of liquid level sensor, can allow again probe conveniently take out.
Further, described liquid level sensor is through liquid level sensor holding wire, metallic screw, spring and steel ball, and consists of electrical connection between the probe.
Further, described steel ball, pressure contact with the probe tube outer wall adjustablely.
Further, described elastic construction is regulated by metallic screw the elastic pressure of probe.
Between described pipe joint and the probe, can adopt screw thread or bayonet socket mode affixed.
Between described pipe joint and the holder, can adopt screw thread or bayonet socket mode affixed.
During real work, holder moves up and down extraction solution with probe under the drive of screw mandrel.The holding wire of liquid level sensor links to each other with probe by metallic screw, spring, steel ball, and the liquid level signal that probe tip is sensed passes on the liquid level sensor.
Holder moves up and down extraction solution with probe under the drive of screw mandrel.The holding wire of liquid level sensor links to each other with probe by metallic screw, spring, steel ball, and the liquid level signal that probe tip is sensed passes on the liquid level sensor.Its middle probe is consumable accessory, needs often to change.
Wherein, because probe needs often to change, the elastic construction that is comprised of metallic screw, spring, steel ball both can allow probe be connected with the holding wire of liquid level sensor, can allow again probe conveniently take out.
This kind liquid level tracking means, replacing probe simple in structure is convenient.When probe extracts solution 1, probe tip is maintained a certain distance with liquid level all the time, and need not insert probe too dark.
By this technical scheme, just reduced significantly the cross pollution that the probe insertion depth causes.Holder moves up and down extraction solution with probe under the drive of screw mandrel.The holding wire of liquid level sensor links to each other with probe by metallic screw, spring, steel ball, and the liquid level signal that probe tip is sensed passes on the liquid level sensor.Its middle probe is consumable accessory, needs often to change.The elastic construction that is comprised of metallic screw, spring, steel ball both can allow probe be connected with the holding wire of liquid level sensor, can allow again probe conveniently take out.
To sum up, this kind liquid level tracking means, simple in structure, replacing probe convenience when probe extracts solution, can make probe tip maintain a certain distance with liquid level all the time, and need not insert probe too dark.Like this, just reduced because of the excessive cross pollution that causes of probe insertion depth.
The utility model can be widely used in design, the manufacturing field of solid-phase extracting instrument.
Claims (8)
1. a liquid level tracking means that is used for solid-phase extracting instrument comprises the probe that is connected with pipeline and the holder that is used for stationary probe, it is characterized in that:
At described holder pipe joint is set, described probe is connected with pipeline by pipe joint;
At described holder liquid level sensor and liquid level sensor holding wire are set;
At described holder adjustment hole and the elastic construction that is positioned at adjustment hole are set, the elastic tip of described elastic construction is exerted pressure to contact with the pipe outer wall of probe and is connected;
Described liquid level sensor holding wire is electrically connected with elastic construction, so that consist of electrical connection between the holding wire of probe and liquid level sensor.
2. according to the liquid level tracking means for solid-phase extracting instrument claimed in claim 1, it is characterized in that described pipe joint is threaded connection mode probe is fixed on the holder.
3. according to the liquid level tracking means for solid-phase extracting instrument claimed in claim 1, it is characterized in that described elastic construction comprises metallic screw, spring and the steel ball that is arranged in the holder adjustment hole, the steel ball of described elastic construction is connected with the probe pressure contact.
4. according to the liquid level tracking means for solid-phase extracting instrument claimed in claim 3, it is characterized in that described metallic screw spins through screw thread to be fixed in the adjustment hole.
5. according to the liquid level tracking means for solid-phase extracting instrument claimed in claim 1, it is characterized in that described liquid level sensor through liquid level sensor holding wire, metallic screw, spring and steel ball, and consist of electrical connection between the probe.
6. according to the liquid level tracking means for solid-phase extracting instrument claimed in claim 5, it is characterized in that described steel ball, pressure contacts with the probe tube outer wall adjustablely.
7. according to the liquid level tracking means for solid-phase extracting instrument claimed in claim 1, it is characterized in that described elastic construction to the elastic pressure of probe, regulates by metallic screw.
8. according to the liquid level tracking means for solid-phase extracting instrument claimed in claim 1, it is characterized in that between described pipe joint and the probe, adopt screw thread or bayonet socket mode affixed; Between described pipe joint and the holder, adopt screw thread or bayonet socket mode affixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220285307 CN202638048U (en) | 2012-06-18 | 2012-06-18 | Liquid level tracking device for solid phrase extraction instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220285307 CN202638048U (en) | 2012-06-18 | 2012-06-18 | Liquid level tracking device for solid phrase extraction instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202638048U true CN202638048U (en) | 2013-01-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220285307 Expired - Fee Related CN202638048U (en) | 2012-06-18 | 2012-06-18 | Liquid level tracking device for solid phrase extraction instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202638048U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109307543A (en) * | 2018-10-12 | 2019-02-05 | 山东省农业科学院农业质量标准与检测技术研究所 | A kind of anti-liquid-detecting that drains off for solid-phase extracting instrument |
-
2012
- 2012-06-18 CN CN 201220285307 patent/CN202638048U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109307543A (en) * | 2018-10-12 | 2019-02-05 | 山东省农业科学院农业质量标准与检测技术研究所 | A kind of anti-liquid-detecting that drains off for solid-phase extracting instrument |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130102 Termination date: 20200618 |