CN208711114U - A kind of Detecting Pesticide pre-treatment extraction column - Google Patents

Abstract

The utility model relates to a kind of Detecting Pesticide pre-treatment extraction column, including outer tube, the upper end opening of the outer tube and lower part of outer tube is equipped with extract liquor collection port, extract liquor collection port is equipped with switch valve；It is equipped with inner tube in outer tube, is equipped with the piston being slidingly sealed between inner and outer tubes；Extraction module is equipped in inner tube, extraction module includes guide way, and extraction module is equipped between guide way and inner tube；Guide way is equipped with pilot hole between two parties, sliding is equipped with operating stick in pilot hole, the lower end of operating stick extends to the downside of guide way and the lower end of operating stick and is equipped with sealing-plug, is equipped with liquid outlet with the lower cover of the inner tube of sealing-plug position corresponding position, the internal diameter of liquid outlet is less than or equal to the outer diameter of sealing-plug；It further include the seal assembly for sealing pilot hole.Inner and outer tubes are relatively moved when extraction, so that forming negative pressure in outer tube can promote the raising of the extraction efficiency in inner tube.

Description

A kind of Detecting Pesticide pre-treatment extraction column

Technical field

The utility model relates to extraction column more particularly to a kind of Detecting Pesticide pre-treatment extraction columns.

Background technique

Solid-phase extraction column is common consumables in current pesticide residue analysis pretreatment process, and type is more, solid phase extraction The principle taken be using solid phase extraction filler in pillar, in fluid sample target compound and chaff interferent carry out selectivity Absorption and elution, reach the separation of chaff interferent and target chemical or the enrichment to target compound.Extraction column extraction process In be typically all under normal pressure state, extraction efficiency is low, rate of extraction is slow.Therefore, it is necessary to one kind can accelerate rate of extraction Extraction column.

Utility model content

The simple and high extraction efficiency pesticide residue the technical problem to be solved by the utility model is to provide a kind of structure Detect pre-treatment extraction column.

In order to solve the above technical problems, the technical solution of the utility model is: a kind of Detecting Pesticide pre-treatment extraction Take column, including outer tube, the lower part of the upper end opening of the outer tube and the outer tube is equipped with extract liquor collection port, and the extract liquor is received Ji Kou is equipped with switch valve；It is equipped with inner tube in the outer tube, the piston being slidingly sealed is equipped between said inner tube and the outer tube； Extraction module is equipped in said inner tube, the extraction module includes guide way, and extraction is equipped between the guide way and said inner tube Take component；The guide way is equipped with pilot hole between two parties, and sliding is equipped with operating stick in the pilot hole, and the lower end of the operating stick is prolonged The lower end for extending to the downside of the guide way and the operating stick is equipped with sealing-plug, and described in the corresponding position of the sealing-plug position The lower cover of inner tube is equipped with liquid outlet, and the internal diameter of the liquid outlet is less than or equal to the outer diameter of the sealing-plug；It further include close Seal the seal assembly of the pilot hole.

The seal assembly includes two interior sealing-plugs for being located at the pilot hole both ends as a preferred technical solution, The interior sealing-plug is fixed in the pilot hole and the interior sealing plug sleeve is slidingly sealed with operating stick formation.

The seal assembly includes the end seal being slidingly sealed with the operating stick as a preferred technical solution, The end seal be located between the sealing-plug and the extraction module and the end seal and the sealing-plug it Between be equipped with maintain spring.

The upper end of said inner tube is equipped with upper end cover as a preferred technical solution, and the upper end cover, which is equipped with, supplies the behaviour Make the upper through-hole of bar stretching, the internal diameter of the upper through-hole is greater than the outer diameter of the operating stick；The upper end of the operating stick is equipped with defeated Liquid bucket, the operating stick is interior to be equipped with the infusion channel for being connected to the infusion bucket and the inner cavity of said inner tube, and the infusion channel is remote One end from the infusion bucket is located at the upside of the extraction module.

The lower end of the outer tube is fixed on the base as a preferred technical solution,.

Piston is arranged between inner and outer tubes in a kind of Detecting Pesticide pre-treatment extraction column, including outer tube and inner tube, Inner and outer tubes are relatively moved when extraction, so that forming negative pressure in outer tube can promote the raising of the extraction efficiency in inner tube.

Detailed description of the invention

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, before not making the creative labor property It puts, is also possible to obtain other drawings based on these drawings.

Fig. 1 is the structural schematic diagram of the utility model embodiment；

Fig. 2 is the structural schematic diagram of the first embodiment of inner tube in the utility model embodiment；

Fig. 3 is the structural schematic diagram of second of embodiment of inner tube in the utility model embodiment.

Specific embodiment

As shown in Figure 1, a kind of Detecting Pesticide pre-treatment extraction column, including outer tube 2, the upper end of the outer tube 2 are opened The lower part of mouth and the outer tube 2 is equipped with extract liquor collection port 21, and switch valve 22 is arranged in extract liquor collection port 21.Outer tube 2 is arranged Pedestal 1, extract liquor collection port 21 are preferably provided on the side wall of outer tube 2.Inner tube 4,4 He of said inner tube are equipped in the outer tube 2 The piston 3 being slidingly sealed is equipped between the outer tube 2；It is equipped with extraction module 43 in said inner tube 4, is realized by extraction module 43 Treat the extraction of detectable substance.In extraction process, in order to improve the speed of extraction, outer tube 2 and inner tube 4 can be relatively moved, so that outside Negative pressure, the raising of facilitated extraction efficiency are formed at the lower part of pipe 2.When extraction, extract liquor collection port 21 is in closed state；Complete extraction After taking, when outer tube 2 is discharged in extract liquor, need to open switch valve 22, it is at this time if inner tube 4 is mobile to the lower end of outer tube 2, it can Accelerate the discharge of extract liquor.

As shown in Fig. 2, the extraction module 43 includes guide way 432, set between the guide way 432 and said inner tube 4 There is extraction module；Extraction module includes two filter plates 431, and filler 433 is arranged between two filter plates 431.The guide way 432 are equipped with pilot hole between two parties, and sliding is equipped with operating stick 42 in the pilot hole, and the lower end of the operating stick 42 extends to described lead The lower end of downside and the operating stick 42 to body 432 is equipped with sealing-plug 44, and described in the 44 position corresponding position of sealing-plug The lower cover of inner tube 4 is equipped with liquid outlet 45, and the internal diameter of the liquid outlet 45 is less than or equal to the outer diameter of the sealing-plug 44；When When sealing-plug 44 is attached on the lower cover of inner tube 4, liquid outlet 45 is blocked.

Filter plate 431 is preferably fixed on 4 inner wall of inner tube, and when operation only needs hand-held operation bar 42.Extracting operation When, inner tube 4 is first pushed into the lower part of outer tube 2 and closes switch valve 22, is pushed away under operating stick 42 and blocks liquid outlet 45；It will be wait extract Take in liquid injection inner tube 4, pull up operating stick 42, operating stick 42 drives inner tube 4 together with respect to 2 uplink of outer tube, outer tube 2 it is interior Chamber forms negative pressure, and extract liquor is promoted to enter in outer tube 2；After completing extracting operation, valve 22 is turned on the switch, pushes 42 band of operating stick Opposite 2 downlink of outer tube of dynamic inner tube 4, under the common promotion of piston 3 and inner tube 4, extract liquor accelerates outflow outer tube 2.

In order to avoid the downside that liquid self- steering hole flow to extraction module 43 in extraction process, it is additionally provided with described in sealing and leads To the seal assembly in hole.As shown in figure 3, the seal assembly includes two interior sealing-plugs 48 for being located at the pilot hole both ends, The interior sealing-plug 48 is fixed in the pilot hole and 48 sets of the interior sealing-plug are slidingly sealed with the operating stick 42 formation.

As shown in Fig. 2, the seal assembly includes the end seal 47 being slidingly sealed with the operating stick 42, the end Portion's sealing element 47 is between the sealing-plug 44 and the extraction module 43 and the end seal 47 and the sealing-plug It is equipped between 44 and maintains spring 49.Maintain spring 49 may make maintains pilot hole to be in close always when 42 upstream or downstream of operating stick Envelope state.

Further, the upper end of said inner tube 4 is equipped with upper end cover, and the upper end cover is equipped with to be stretched out for the operating stick 42 Upper through-hole, the gas when internal diameter of the upper through-hole is greater than the outer diameter of the operating stick 42 to guarantee adding liquid in inner tube 4 Outlet.Equipped with infusion bucket 41, the operating stick 42 is interior equipped with the connection infusion bucket 41 and described for the upper end of the operating stick 42 The infusion channel 46 of the inner cavity of inner tube 4, the infusion channel 46 are located at the extraction module far from one end of the infusion bucket 41 43 upside.

The advantages of basic principles and main features and the utility model of the utility model have been shown and described above.Current row The technical staff of industry is described in above embodiments and description it should be appreciated that the present utility model is not limited to the above embodiments Only illustrate the principles of the present invention, on the premise of not departing from the spirit and scope of the utility model, the utility model is also It will have various changes and improvements, these various changes and improvements fall within the scope of the claimed invention.The utility model Claimed range is defined by the appending claims and its equivalent thereof.

Claims (5)

1. a kind of Detecting Pesticide pre-treatment extraction column, it is characterised in that: including outer tube, the upper end opening of the outer tube and The lower part of the outer tube is equipped with extract liquor collection port, and the extract liquor collection port is equipped with switch valve；It is equipped in the outer tube interior Pipe is equipped with the piston being slidingly sealed between said inner tube and the outer tube；Extraction module, the extraction mould are equipped in said inner tube Block includes guide way, and extraction module is equipped between the guide way and said inner tube；The guide way is equipped with pilot hole between two parties, institute It states sliding in pilot hole and is equipped with operating stick, the lower end of the operating stick extends to the downside of the guide way and the operating stick Lower end is equipped with sealing-plug, is equipped with liquid outlet, the liquid out with the lower cover of the said inner tube of sealing-plug position corresponding position The internal diameter of mouth is less than or equal to the outer diameter of the sealing-plug；It further include the seal assembly for sealing the pilot hole.

2. a kind of Detecting Pesticide pre-treatment extraction column as described in claim 1, it is characterised in that: the seal assembly It is located at the interior sealing-plug at the pilot hole both ends including two, the interior sealing-plug is fixed in the pilot hole and described interior close Blocking set is slidingly sealed with operating stick formation.

3. a kind of Detecting Pesticide pre-treatment extraction column as described in claim 1, it is characterised in that: the seal assembly Including the end seal being slidingly sealed with the operating stick, the end seal is located at the sealing-plug and the extraction mould It is equipped between block and between the end seal and the sealing-plug and maintains spring.

4. a kind of Detecting Pesticide pre-treatment extraction column as described in claim 1, it is characterised in that: said inner tube it is upper End is equipped with upper end cover, and the upper end cover is equipped with the upper through-hole stretched out for the operating stick, and the internal diameter of the upper through-hole is greater than institute State the outer diameter of operating stick；The upper end of the operating stick is equipped with infusion bucket, is equipped in the operating stick and is connected to the infusion bucket and institute The infusion channel of the inner cavity of inner tube is stated, the infusion channel is located at the upper of the extraction module far from one end of the infusion bucket Side.

5. a kind of Detecting Pesticide pre-treatment extraction column as described in claim 1, it is characterised in that: under the outer tube End is fixed on the base.