CN205506772U - A stake pocket pole sealing system for full -automatic solid -phase extraction appearance - Google Patents
A stake pocket pole sealing system for full -automatic solid -phase extraction appearance Download PDFInfo
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- CN205506772U CN205506772U CN201521116747.XU CN201521116747U CN205506772U CN 205506772 U CN205506772 U CN 205506772U CN 201521116747 U CN201521116747 U CN 201521116747U CN 205506772 U CN205506772 U CN 205506772U
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Abstract
The utility model provides a stake pocket pole sealing system for full -automatic solid -phase extraction appearance, belongs to the chromatography field. It sets up a combination formula post inserted rod type seal structure including movable rod and drain pole on solid -phase extraction post upper portion, its movable rod is the cavity tubular structure, is provided with the end cover that has the liquid -transfering needle pinhole on movable rod upper portion, is provided with the drain pole at the hollow portion of movable rod suit, the drain pole is the middle columnar structure that has the drain passageway, and drain pole bottom be arcuation flaring structure, drain pole bottom and lie in solid -phase extraction pillar cavity's solid adsorption agent on end face contaction, joint portion at movable rod and drain pole is provided with the sealing washer. This technical scheme has guaranteed that sample or solvent pass through the solid adsorption agent with stable speed uniformly, and analysis result's the accuracy and the degree of accuracy have not been ensured to the gassing to can accomplish the solid -phase extraction process in batches automatically. The design and the manufacturing field that can extensively be used for full -automatic solid -phase extraction appearance.
Description
Technical field
This utility model belongs to chromatography field, particularly relates to a kind of post inserted link for Full-automatic solid phase extraction instrument close
Seal apparatus.
Background technology
It is known that food safety, environmental pollution the most serious had influence on the healthy of people.Along with society
Development, country the most increasingly payes attention to the monitoring to food safety and the control of environmental pollution.The sample type analyzed and monitor
And quantity gets more and more, bring unprecedented pressure to analysis experimenter.
Through investigation, during the analysis of a sample, when the time that the pre-treatment of sample is spent accounts for whole sample analysis
Between 61%.It is obvious that sample pre-treatments has become as obstruction, we improve the bottleneck of analysis efficiency.Before chromatography
Processing procedure-Solid-Phase Extraction, the automatization of processing method has become the most necessary, and Full-automatic solid phase extraction the most just arises at the historic moment.
Sample pre-treatments position shared by during whole analysis is particularly significant.
Solid-Phase Extraction is one of important method of sample pre-treatments, and it is a kind of sample pre-treatments side based on chromatographic isolation
Method, Solid-Phase Extraction includes solid phase (having the solid absorbent of certain functional group) and liquid phase (sample and solvent).Fluid sample exists
By equipped with solid absorbent solid-phase extraction column under the effect of malleation, negative pressure or gravity.Owing to solid absorbent has different
Functional group, can adsorb specific compound and be retained on solid-phase extraction column.
According to the purpose of use Solid-Phase Extraction, Solid-Phase Extraction can be divided into again both of which.One is that solid-phase extraction column is main
Target compound in adsorption sample, referred to as target compound absorption mode Solid-Phase Extraction；And another is impurity
Absorption mode Solid-Phase Extraction, the impurity during i.e. solid-phase extraction column is mainly used in adsorption sample.
Along with the further investigation to solid phase extraction, Full-automatic solid phase extraction instrument is owing to can be automatically performed the whole of sample
Extraction process, and batch processing sample can be carried out, so deeply being favored by user.The principle of Full-automatic solid phase extraction instrument
It is: three groups of mechanical arms drive liquid-transfering needle to move along X, Y, Z-direction, coordinate syringe pump or other power source to complete automatic liquid-pumping
With play the work that surges, thus complete the processes such as the pretreatment of Solid-Phase Extraction, loading, drip washing, eluting.
According to statistics, for a given sample, during whole chromatography, wherein the source of error of 30% is in sample
Pre-treatment.So the Solid-Phase Extraction as chromatography pretreatment process is a highly important step, it is ensured that analyze knot
The degree of accuracy of fruit and accuracy, it is necessary to start with from Solid-Phase Extraction.
In solid phase extraction procedure, during " loading " and " eluting ", liquid can through the velocity-stabilization of solid phase extraction column
Control, liquid flow uniformly through the solid absorbent of solid phase extraction column and are to ensure that chromatography result degree of accuracy and the key of accuracy
Factor.Post inserted link sealing system then can make solid-phase extracting instrument realize this function.
Full-automatic solid phase extraction instrument production firm both knows about the advantage of post inserted link sealing system both at home and abroad, but due to design difficulty
Spend big, the most do not use, or use the sealing means sealing lid to provide malleation (i.e. within holding extraction column just
Pressure).
The structure of existing solid phase extraction column seal cap sealing system as shown in fig. 1, (is also called for short at solid phase extraction column
For solid-phase extraction column) opening (i.e. the upper end of solid-phase extraction column in figure) of 4, it is provided with the liquid-transfering needle 1 sealing lid 8,
The bottom (lower end of solid-phase extraction column in figure) of solid-phase extraction column, is provided with solid absorbent 7.Due to the lower end of liquid-transfering needle with
There is air section 9 between solid absorbent, cause in " loading " and " eluting " operating process in solid phase extraction procedure, move liquid
The liquid that pin flows out is to meet with solid absorbent with the liquid of a drop-wise, result in the liquid speed through solid phase extraction column
Unstable, it is impossible to ensure that liquid flows uniformly through the solid absorbent of solid-phase extraction column, and due to the existence of air section, result in sample
Product or solvent easily produce bubble, and then have impact on degree of accuracy and the accuracy of analysis result.
Utility model content
It is close that technical problem to be solved in the utility model is to provide a kind of post inserted link for Full-automatic solid phase extraction instrument
Envelope system, it uses the post hinge pedestal structure with liquid-conveying ducts and drain head that bottom is arcuation flaring structure, it is ensured that sample
Product or solvent uniformly across solid absorbent with stable speed, do not produce bubble, and can complete solid phase with automatic batch
Extraction process.
The technical solution of the utility model is: provide a kind of post inserted link sealing system for Full-automatic solid phase extraction instrument,
Including being positioned at the sealing structure of solid-phase extraction column upper, open end and being positioned at the liquid-transfering needle of Z axis mechanical arm front end；Described shifting liquid
Pin is for injecting sample or solvent in solid-phase extraction column；It is characterized in that:
At the opening on described solid-phase extraction column top, the sealing structure of a column structure is set；
The sealing structure of described column structure at least includes motion bar and the fluid-directing rod being sequentially connected with, described motion bar and
Fluid-directing rod constitutes knockdown post inserted-link type and seals structure；
Wherein, described motion bar is the tubular structure of a hollow, is provided with one with liquid-transfering needle on the top of motion bar
The end cap of pin hole, the hollow space in motion bar, suit is provided with fluid-directing rod；
Described fluid-directing rod is the column structure in the middle of with liquid-conveying ducts；
The bottom of described fluid-directing rod is arcuation flaring structure；
The bottom of described fluid-directing rod, contacts with the upper surface of the solid absorbent being positioned at solid-phase extraction column intracavity；
In the joint portion of described motion bar Yu fluid-directing rod, it is provided with sealing ring；
Described motion bar or the external diameter of fluid-directing rod, less than the internal diameter of solid-phase extraction column inner chamber；
Described fluid-directing rod and motion bar suit external diameter partly, less than the internal diameter of motion bar；
Longitudinal length after described motion bar and fluid-directing rod combined set, more than solid-phase extraction column upper, open end to solid phase
Distance between solid absorbent upper surface in extraction column；
Described liquid-transfering needle is made up of the needle point of needle body and front end；
The external diameter of described liquid-transfering needle needle body is more than the diameter of liquid-transfering needle pin hole on described end cap.
The technical solution of the utility model, additionally provides a kind of post inserted link for Full-automatic solid phase extraction instrument and seals system
System, including being positioned at the sealing structure of solid-phase extraction column upper, open end and being positioned at the liquid-transfering needle of Z axis mechanical arm front end；Described shifting
Liquid pin is for injecting sample or solvent in solid-phase extraction column；It is characterized in that:
Described sealing structure includes motion bar, fluid-directing rod and the drain head being sequentially connected with, described motion bar, fluid-directing rod
Constitute knockdown post inserted-link type with drain head and seal structure；
Wherein, described motion bar is the tubular structure of a hollow, is provided with one with liquid-transfering needle on the top of motion bar
The end cap of pin hole, the hollow space in motion bar, suit is provided with fluid-directing rod；
Described fluid-directing rod is the column structure in the middle of with liquid-conveying ducts, and in the bottom of fluid-directing rod, nesting is plugged with
Drain head；
The bottom of described drain head is arcuation flaring structure；
The bottom of described drain head, contacts with the upper surface of the solid absorbent being positioned at solid-phase extraction column intracavity；
In the joint portion of described motion bar Yu drain head, it is provided with sealing ring；
Described motion bar or the external diameter of drain head, less than the internal diameter of solid-phase extraction column inner chamber；
The external diameter of described fluid-directing rod, less than the internal diameter of motion bar；
Longitudinal length after described motion bar, fluid-directing rod and drain head combined set, more than solid-phase extraction column upper opening
Hold to distance between solid absorbent upper surface in solid-phase extraction column；
Described liquid-transfering needle is made up of the needle point of needle body and front end；
The external diameter of described liquid-transfering needle needle body is more than the diameter of liquid-transfering needle pin hole on described end cap.
Concrete, use interference fit between tip portion and the liquid-conveying ducts of fluid-directing rod of described liquid-transfering needle, to reach
Sealing effectiveness.
Concrete, the external diameter of described liquid-transfering needle needle body, more than the external diameter of described needle point, constitutes the step-like liquid-transfering needle of column
Outside diameter structure.
Compared with the prior art, the utility model has the advantages that:
1. use the technical program, it is possible to reduce the air in solid-phase extraction column cavity so that sample or solvent are with stable
Flow velocity by solid absorbent, and reduce bubble by solid absorbent, thus improve impurity-eliminating effect, improve solid phase
The repeatability of extraction results；
2. use the technical program, when sample flows through post inserted link, be laid in solid absorbent upper surface so that sample exists
Can be well-proportioned by solid absorbent under the effect of malleation or negative pressure, increase solid absorbent and the contact area of sample,
Improve Solid-Phase Extraction effect；
3. use the technical program, liquid-transfering needle provide downward thrust so that sample or solvent pass through solid absorbent
Time the post inserted link sealing system bigger pressure of tolerance, applicable a greater variety of samples, in other words, it can extract wider scope
Sample, and solid absorbent filling process requirement can be reduced；
4., under the drive of mechanical arm, liquid-transfering needle can switch equally between multiple post inserted link sealing systems, it is achieved thereby that
The batch processing of Solid-Phase Extraction.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing extraction column seal cap sealing system；
Fig. 2 is the cross-sectional view of this utility model post inserted link sealing system；
Fig. 3 is the cross-sectional view of this utility model post inserted link sealing system embodiment；
Fig. 4 is the structural representation of this utility model liquid-transfering needle；
Fig. 5 is the cross-sectional view of this utility model drain head.
In figure, 1 is liquid-transfering needle, and 11 is needle body, and 12 is needle point, and 2 is motion bar, and 3 is fluid-directing rod, and 3-1 is liquid-conveying ducts, and 4 are
Solid-phase extraction column, 5 is sealing ring, and 6 is drain head, and 6-1 is arcuation flaring structure, and 6-2 is that head is protruding, and 7 is solid absorbent,
8 for sealing lid, and 9 is to seal the air section between lid and solid absorbent.
Detailed description of the invention
Below in conjunction with the accompanying drawings this utility model is described further.
In Fig. 2, the technical solution of the utility model provides a kind of post inserted link for Full-automatic solid phase extraction instrument and seals
System, including being positioned at the sealing structure of solid-phase extraction column upper, open end and being positioned at the liquid-transfering needle of Z axis mechanical arm front end；Described
Liquid-transfering needle is for injecting sample or solvent in solid-phase extraction column；Its inventive point is:
At the opening on described solid-phase extraction column top, the sealing structure of a column structure is set；
The sealing structure of above-mentioned column structure at least includes motion bar 2 and the fluid-directing rod 3 being sequentially connected with, described motion bar
Constitute knockdown post inserted-link type with fluid-directing rod and seal structure；
Wherein, motion bar is the tubular structure of a hollow, is provided with one on the top of motion bar with liquid-transfering needle pin hole
End cap, the hollow space in motion bar, suit is provided with fluid-directing rod；
Above-mentioned fluid-directing rod is the column structure in the middle of with liquid-conveying ducts 3-1；In the lower end of fluid-directing rod, it is provided with head
Portion's projection 6-2；
The bottom of described fluid-directing rod head projection is arcuation flaring structure 6-1；
The bottom that described fluid-directing rod head is protruding, connects with the upper surface of the solid absorbent 7 being positioned at solid-phase extraction column 4 intracavity
Touch；
In the joint portion that motion bar is protruding with fluid-directing rod head, it is provided with sealing ring 5；
Its motion bar or the external diameter of fluid-directing rod, less than the internal diameter of solid-phase extraction column inner chamber；
Described fluid-directing rod and motion bar suit external diameter partly, less than the internal diameter of motion bar；
Longitudinal length after above-mentioned motion bar and fluid-directing rod combined set, more than solid-phase extraction column upper, open end to solid phase
Distance between solid absorbent upper surface in extraction column.
In Fig. 3, the technical solution of the utility model provides a kind of post inserted link for Full-automatic solid phase extraction instrument and seals
System, including being positioned at the sealing structure of solid-phase extraction column upper, open end and being positioned at the liquid-transfering needle of Z axis mechanical arm front end；Described
Liquid-transfering needle is for injecting sample or solvent in solid-phase extraction column；Its inventive point is:
Aforesaid sealing structure includes motion bar 2, fluid-directing rod 3 and the drain head 6 being sequentially connected with, and described motion bar, leads
Liquid bar and drain head constitute knockdown post inserted-link type and seal structure；
Wherein, described motion bar is the tubular structure of a hollow, is provided with one with liquid-transfering needle on the top of motion bar
The end cap of pin hole, the hollow space in motion bar, suit is provided with fluid-directing rod；
Aforesaid fluid-directing rod is the column structure in the middle of with liquid-conveying ducts 3-1, in the bottom of fluid-directing rod, and nested grafting
There is drain head 6；
The bottom of described drain head is arcuation flaring structure 6-1；
The bottom of described drain head, contacts with the upper surface of the solid absorbent 7 being positioned at solid-phase extraction column 4 intracavity；
In the joint portion of described motion bar Yu drain head, it is provided with sealing ring 5；
Its motion bar or the external diameter of drain head, less than the internal diameter of solid-phase extraction column inner chamber；
The external diameter of its fluid-directing rod, less than the internal diameter of motion bar；
Longitudinal length after described motion bar, fluid-directing rod and drain head combined set, more than solid-phase extraction column upper opening
Hold to distance between solid absorbent upper surface in solid-phase extraction column.
It is apparent that when the fluid-directing rod 3 shown in Fig. 3 and drain head 6 use integrated inseparable version, just
Define the monoblock type fluid-directing rod structure with head bulge-structure 6-2 in Fig. 2.
Obviously, the fluid-directing rod 3 shown in Fig. 3 and drain head 6 use separable version, are based on easy to assembly
Consider, if based on processing technique or the variation of installation step with being easy to the reasons such as processing so that fluid-directing rod 3 and drain head
Without using separable split-type structural between 6, then it is exactly the entirety with head bulge-structure 6-2 shown in Fig. 2
Formula fluid-directing rod structure, vice versa.
So, shown in Fig. 3 use the fluid-directing rod 3 of separable version and drain head 6 to assemble after, its function and
Monnolithic case structure, fully equivalent in the monoblock type fluid-directing rod structure with head bulge-structure 6-2 shown in Fig. 2, otherwise
As the same.
In Fig. 4, described liquid-transfering needle is made up of the needle point 12 of needle body 11 and front end.
The external diameter of described liquid-transfering needle needle body is more than the diameter of liquid-transfering needle pin hole on described end cap.
Interference fit is used, to reach to seal effect between tip portion and the liquid-conveying ducts of fluid-directing rod of described liquid-transfering needle
Really.
The external diameter of described liquid-transfering needle needle body, more than the external diameter of described needle point, constitutes column step-like liquid-transfering needle external diameter knot
Structure.
During real work, liquid-transfering needle 1 is under the drive of Full-automatic solid phase extraction instrument Z axis mechanical arm, and needle point pricks fluid-directing rod 3
In, the tip portion of liquid-transfering needle and the endoporus interference fit of fluid-directing rod, to reach sealing effectiveness.
Liquid-transfering needle 1 continues to move down under the drive of Z axis mechanical arm, and the body sections of liquid-transfering needle pushes down motion bar 2.Live
Lever 2 crush seal circle 5, owing to the material of sealing ring 5 is softer, so generation deformation can be extruded so that it is external diameter becomes big, thus
Closely cooperate with the inwall of solid-phase extraction column 4, play good sealing effectiveness.
Flow through the sample in liquid-transfering needle 1 or solvent, flow into solid absorbent by the liquid-conveying ducts of fluid-directing rod 3, sample or
Solvent is enclosed in sealing ring less than 5.
Use the post inserted link sealing system of the technical program, it is possible to reduce the air in solid-phase extraction column cavity so that molten
Agent or sample by solid absorbent with stable flow velocity, do not have air to flow through solid absorbent, thus reach good solid phase
Effect of extracting.And liquid-transfering needle moves to next position and enters after completing the processing procedure of a sample under the drive of mechanical arm
Row sample treatment, thus realize the process of sample batch processing.
When fluid sample flows through solid absorbent, stable flow velocity is particularly significant for extraction efficiency.For target chemical combination
Thing absorption mode Solid-Phase Extraction, flow velocity is too fast, and the pressure produced in solid-phase extraction column is excessive, and target compound is along with impurity together
It is washed off, the response rate of target compound can be reduced；Flow velocity is crossed and not only can be reduced work efficiency slowly, it is also possible to can make sample substrate
In other compositions be retained, thus cause interference with thing increase, the response rate reduce, have influence on follow-up analysis result.Use this
Sample or solvent that post inserted link sealing system, syringe pump or other power sources are got by liquid-transfering needle directly pass through solid absorption
Agent, without be trapped in the upside of solid absorbent, sample or solvent flow through the speed of solid absorbent and syringe pump or other
Flow velocity set by power source keeps consistent, thus ensure that the stability of flow velocity when sample or solvent flow through solid absorbent.
Reduce bubble and pass through solid absorbent, it is possible to increase solid absorbent and the contact area of sample, be conducive to improving Solid-Phase Extraction effect
Really.
Granule in sample that viscosity is big or sample is more, often causes solid absorbent partly or entirely to block, from
And affecting the sample speed by solid absorbent, severe patient can make sample cannot pass through solid absorbent thus cause solid phase to extract
Take procedure failure.This post inserted link sealing system is used to can tolerate bigger pressure so that viscosity is compared with big or that granule is more sample
Pass through solid absorbent, complete extraction process.Solid absorbent is powdery solid, needs machine or is manually loaded into solid phase
In extraction column, although the solid-phase extraction column that machine loads is the most homogeneous, but load every time and certainly there are differences, the specialty that consumption is few
Post, loads the most by hand, and operation technique is difficult to control to strict conformance.Loaded secret meeting limited flow rate, easily occurred that solid phase extracted
Take post stopping state, use this post inserted link sealing system because can tolerate bigger pressure, so to filling process require need not
Particularly severe.
The sealing of this post inserted link sealing system is that the crimp by sealing ring realizes, and Z axis mechanical arm drives and moves
Liquid pin moves down so that sealed ring deformation, it is not necessary to plus structural.So under the drive of mechanical arm, liquid-transfering needle completes Solid-Phase Extraction
Next solid-phase extraction column being assembled with post inserted link sealing system can be moved on to after process, proceed Solid-Phase Extraction action, it is not necessary to people
For intervening, thus realize the batch processing of Solid-Phase Extraction.
In Fig. 5, the bottom of drain head 6 is arcuation flaring structure 6-1.
After using said structure, sample flows through and (is actually similar to a trumpet-shaped opening with arcuation flaring structure
Structure) drain head bottom, after being laid in the whole upper surface of solid absorbent 7, uniformly across solid absorbent, will not concentrate
At certain point or concentrate on relatively facet and produce " trench effect ".
" trench effect " is unfavorable for effectively extracting, because this effect can reduce the surface area that adsorbent contacts with sample,
Cause being decreased obviously of adsorbent capacity.When post crossed by sample, sample segment enters these irrigation canals and ditches quickly through solid absorbent,
Fail to contact with adsorbent fully so that the response rate reduces.
By measure the agriculture in Folium Camelliae sinensis residual during sample by contrasting as a example by the Contrast on effect of solid-phase extraction column:
When using the post inserted link sealing system of the technical program, observe the Folium Camelliae sinensis absorption situation by solid-phase extraction column, can
See that the absorption ratio of solid-phase extraction column is more uniform.
When using sealing convering system, observe the Folium Camelliae sinensis absorption situation by solid-phase extraction column, it can be seen that solid-phase extraction column
Solid absorbent on the upside of absorption and the most downward more few, there is obvious non-uniform phenomenon.
With same size and the solid-phase extraction column of brand, 2g pure water syringe pump is got under identical stable flow velocity
In solid-phase extraction column, one of which post inserted link mode seals, and another kind seals lid mode and seals, after collecting post respectively
Liquid is weighed, and result is as follows:
| Seal structure | 1st time | 2nd time | 3rd time | The 4th | The 5th | 6th time | Meansigma methods | RSD (%) |
| Post inserted link | 1.9923 | 1.9902 | 1.9888 | 1.9930 | 1.9894 | 1.9907 | 1.9907 | 0.0822 |
| Seal lid | 1.8674 | 1.8637 | 1.8569 | 1.8662 | 1.8476 | 1.8538 | 1.8593 | 0.4203 |
Interpretation of result: from above-mentioned data it is known that by the post inserted link sealing means ratio seal cap sealing mode response rate
Wanting height, relative standard deviation is little.
Have employed the post hinge pedestal structure with liquid-conveying ducts due to the technical solution of the utility model and bottom is that arcuation expands
The drain head of mouth structure, it is possible to reduce the air in solid-phase extraction column cavity so that sample or solvent pass through with stable flow velocity
Solid absorbent, and reduce bubble and pass through solid absorbent；When sample flows through post inserted link, it is laid in table on solid absorbent
Face so that sample can be well-proportioned by solid absorbent under the effect of malleation or negative pressure, increases solid absorbent and sample
The contact area of product, improves Solid-Phase Extraction effect；Additionally, provided downward thrust by liquid-transfering needle so that sample or solvent pass through
The pressure that during solid absorbent, the tolerance of post inserted link sealing system is bigger, the sample of applicable extraction wider scope, and can reduce
Solid absorbent filling process requirement；Its liquid-transfering needle can switch equally between multiple post inserted link sealing systems, it is achieved thereby that solid
The batch processing extracted mutually.
This utility model can be widely used for design and the manufacture field of Full-automatic solid phase extraction instrument.
Claims (4)
1. for a post inserted link sealing system for Full-automatic solid phase extraction instrument, including being positioned at solid-phase extraction column upper, open end
Seal structure and be positioned at the liquid-transfering needle of Z axis mechanical arm front end；Described liquid-transfering needle is for injecting Solid-Phase Extraction by sample or solvent
In post；It is characterized in that:
At the opening on described solid-phase extraction column top, the sealing structure of a column structure is set；
The sealing structure of described column structure at least includes motion bar and the fluid-directing rod being sequentially connected with, described motion bar and drain
Bar constitutes knockdown post inserted-link type and seals structure；
Wherein, described motion bar is the tubular structure of a hollow, is provided with one on the top of motion bar with liquid-transfering needle pin hole
End cap, the hollow space in motion bar, suit be provided with fluid-directing rod；
Described fluid-directing rod is the column structure in the middle of with liquid-conveying ducts；
The bottom of described fluid-directing rod is arcuation flaring structure；
The bottom of described fluid-directing rod, contacts with the upper surface of the solid absorbent being positioned at solid-phase extraction column intracavity；
In the joint portion of described motion bar Yu fluid-directing rod, it is provided with sealing ring；
Described motion bar or the external diameter of fluid-directing rod, less than the internal diameter of solid-phase extraction column inner chamber；
Described fluid-directing rod and motion bar suit external diameter partly, less than the internal diameter of motion bar；
Longitudinal length after described motion bar and fluid-directing rod combined set, more than solid-phase extraction column upper, open end to Solid-Phase Extraction
Distance between solid absorbent upper surface in post；
Described liquid-transfering needle is made up of the needle point of needle body and front end；
The external diameter of described liquid-transfering needle needle body is more than the diameter of liquid-transfering needle pin hole on described end cap.
2. for a post inserted link sealing system for Full-automatic solid phase extraction instrument, including being positioned at solid-phase extraction column upper, open end
Seal structure and be positioned at the liquid-transfering needle of Z axis mechanical arm front end；Described liquid-transfering needle is for injecting Solid-Phase Extraction by sample or solvent
In post；It is characterized in that:
At the opening on described solid-phase extraction column top, the sealing structure of a column structure is set；
The sealing structure of described column structure includes motion bar, fluid-directing rod and the drain head being sequentially connected with, and described motion bar, leads
Liquid bar and drain head constitute knockdown post inserted-link type and seal structure；
Wherein, described motion bar is the tubular structure of a hollow, is provided with one on the top of motion bar with liquid-transfering needle pin hole
End cap, the hollow space in motion bar, suit be provided with fluid-directing rod；
Described fluid-directing rod is the column structure in the middle of with liquid-conveying ducts, and in the bottom of fluid-directing rod, nesting is plugged with drain
Head；
The bottom of described drain head is arcuation flaring structure；
The bottom of described drain head, contacts with the upper surface of the solid absorbent being positioned at solid-phase extraction column intracavity；
In the joint portion of described motion bar Yu drain head, it is provided with sealing ring；
Described motion bar or the external diameter of drain head, less than the internal diameter of solid-phase extraction column inner chamber；
The external diameter of described fluid-directing rod, less than the internal diameter of motion bar；
Longitudinal length after described motion bar, fluid-directing rod and drain head combined set, more than solid-phase extraction column upper, open end extremely
Distance between solid absorbent upper surface in solid-phase extraction column；
Described liquid-transfering needle is made up of the needle point of needle body and front end；
The external diameter of described liquid-transfering needle needle body is more than the diameter of liquid-transfering needle pin hole on described end cap.
3., according to the post inserted link sealing system for Full-automatic solid phase extraction instrument described in claim 1 or 2, it is characterized in that described
Interference fit is used, to reach sealing effectiveness between tip portion and the liquid-conveying ducts of fluid-directing rod of liquid-transfering needle.
4., according to the post inserted link sealing system for Full-automatic solid phase extraction instrument described in claim 1 or 2, it is characterized in that described
The external diameter of liquid-transfering needle needle body, more than the external diameter of described needle point, constitutes column step-like liquid-transfering needle outside diameter structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521116747.XU CN205506772U (en) | 2015-12-29 | 2015-12-29 | A stake pocket pole sealing system for full -automatic solid -phase extraction appearance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521116747.XU CN205506772U (en) | 2015-12-29 | 2015-12-29 | A stake pocket pole sealing system for full -automatic solid -phase extraction appearance |
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| CN205506772U true CN205506772U (en) | 2016-08-24 |
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| CN201521116747.XU Expired - Fee Related CN205506772U (en) | 2015-12-29 | 2015-12-29 | A stake pocket pole sealing system for full -automatic solid -phase extraction appearance |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105467047A (en) * | 2015-12-29 | 2016-04-06 | 上海屹尧仪器科技发展有限公司 | Column inserted link sealing system used for full-automatic solid-phase extractor |
| CN114570183A (en) * | 2022-03-01 | 2022-06-03 | 西安热工研究院有限公司 | Derivatization reaction device of urea hydrolysis sediment |
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2015
- 2015-12-29 CN CN201521116747.XU patent/CN205506772U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105467047A (en) * | 2015-12-29 | 2016-04-06 | 上海屹尧仪器科技发展有限公司 | Column inserted link sealing system used for full-automatic solid-phase extractor |
| CN114570183A (en) * | 2022-03-01 | 2022-06-03 | 西安热工研究院有限公司 | Derivatization reaction device of urea hydrolysis sediment |
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