CN220819932U - Liquid phase sampling valve - Google Patents
Liquid phase sampling valve Download PDFInfo
- Publication number
- CN220819932U CN220819932U CN202322664112.4U CN202322664112U CN220819932U CN 220819932 U CN220819932 U CN 220819932U CN 202322664112 U CN202322664112 U CN 202322664112U CN 220819932 U CN220819932 U CN 220819932U
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- valve body
- valve
- body shell
- liquid phase
- connecting hole
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- 239000007791 liquid phase Substances 0.000 title claims abstract description 25
- 238000005070 sampling Methods 0.000 title claims abstract description 19
- 238000002347 injection Methods 0.000 claims abstract description 51
- 239000007924 injection Substances 0.000 claims abstract description 51
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 7
- 239000004696 Poly ether ether ketone Substances 0.000 claims description 3
- 229920002530 polyetherether ketone Polymers 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000000523 sample Substances 0.000 description 60
- 239000007788 liquid Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000013068 control sample Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000004128 high performance liquid chromatography Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Sampling And Sample Adjustment (AREA)
Abstract
The utility model discloses a liquid phase sampling valve, comprising: the valve comprises a first valve body shell, a second valve body shell and a valve core; the first valve body shell is connected with the second valve body shell; grooves for accommodating valve cores are arranged on the first valve body shell and the second valve body shell; the bottom of the valve core is provided with a dovetail groove, and the first valve body shell and the second valve body shell are provided with sliding grooves; an inner hole channel is arranged on the valve core, and a positioning protrusion is arranged on the valve core; a positioning groove is formed in the first valve body shell; a pipeline inlet connecting hole is arranged on the first valve body shell in a penetrating way; a pipeline outlet connecting hole is arranged on the second valve body shell at a position corresponding to the inner hole channel; when the valve core slides in the groove, the pipeline inlet connecting hole or the pipeline outlet connecting hole is coaxially communicated with the inner hole channel. Because the valve core can slide in the valve body, an inner hole channel on the valve core is coaxially communicated with an inlet pipeline and an outlet pipeline on the valve body, so that quantitative sample injection is realized, the dead volume is reduced, the sample injection is accurate, and the use is convenient.
Description
Technical Field
The utility model belongs to the technical field of sampling valves, and particularly relates to a liquid phase sampling valve.
Background
The sample injection valve is a multi-way valve for accurately and quantitatively introducing a sample into a chromatographic system, and is commonly used for the sample injection of high performance liquid chromatography. The microscale sample injection valve is one of sample injection valves, has a smaller sample injection amount range, is a key instrument in laboratory and industrial application, and is used for accurately controlling the sample injection amount of a sample so as to ensure the accuracy and repeatability of analysis. The design and configuration of the microsyringe valve may vary depending on the requirements of a particular application. Some common microscale sample valve types include injector sample valves, rotary sample valves, and diaphragm sample valves, where injector sample valves typically use a combination of a piston and cylinder to control the sample volume; the rotary sample injection valve realizes sample injection control through a rotary valve; the diaphragm type sample injection valve uses a diaphragm to control sample injection flow. Currently, nanoliter volume sample injectors exist in the market, and the minimum sample injection amount of 4nL can be obtained by injecting samples in a rotary mode by engraving a built-in metering tube on a rotor.
However, the conventional microscale sampling valve has high precision requirement and high processing difficulty due to the fact that the upgrade groove is etched on the rotor; meanwhile, a certain dead volume exists between the built-in quantitative ring on the rotor and the pipeline during sample injection, and the dead volume can have a great influence during microscale sample injection, especially nano-upgrading sample injection. Therefore, the conventional microscale sampling valve has the problems of large dead volume and inconvenient operation.
Disclosure of utility model
Aiming at the problems, it is necessary to provide a liquid phase sampling valve which is convenient to use and has strong sampling accuracy.
A liquid phase injection valve comprising: the valve comprises a first valve body shell, a second valve body shell and a valve core; the first valve body shell is detachably connected with the second valve body shell through a connecting piece; the valve core is arranged between the first valve body shell and the second valve body shell; wherein:
Grooves are formed in the first valve body shell and the second valve body shell, and the grooves are used for accommodating the valve cores; the bottom of the valve core is provided with a dovetail groove, and sliding grooves are formed in positions, corresponding to the dovetail groove, of the first valve body shell and the second valve body shell;
An inner hole channel is formed in the valve core, and a positioning protrusion is arranged on one side, close to the first valve body shell, of the valve core; a positioning groove is formed in the first valve body shell at the position opposite to the positioning protrusion;
a pipeline inlet connecting hole is arranged on the first valve body shell in a penetrating manner, and the position of the pipeline inlet connecting hole corresponds to the inner hole channel; a pipeline outlet connecting hole is formed in the position, corresponding to the inner hole channel, of the second valve body shell;
when the valve core slides in the groove, the pipeline inlet connecting hole or the pipeline outlet connecting hole is coaxially communicated with the inner hole channel.
In one embodiment, the connector is a screw; the first valve body shell is uniformly provided with first connecting holes; a second connecting hole is formed in the second valve body shell at a position corresponding to the first connecting hole; the screw penetrates through the first connecting hole and the second connecting hole to connect the first valve body shell with the second valve body shell.
In one embodiment, three inner hole channels are provided and are uniformly distributed in the middle of the valve core.
In one embodiment, the sliding length of the dovetail groove in the sliding groove is the same as the sliding length of the positioning protrusion in the positioning groove and the interval between the inner hole channels.
In one embodiment, the pipeline inlet connecting hole and the pipeline outlet connecting hole are respectively provided with two.
In one embodiment, sample injection pipelines are disposed in the three inner hole channels.
In one embodiment, the sample line has an outer diameter of 780 μm to 820 μm.
In one embodiment, the sample line is made of a polyetheretherketone material.
In one embodiment, the three internal bore passages are spaced apart by a distance of 9mm to 11mm.
In one embodiment, the first valve body housing and the second valve body housing are each made of a stainless steel material.
According to the liquid phase sampling valve, the dovetail groove is formed in the bottom of the valve core, the sliding grooves are formed in the first valve body shell and the second valve body shell, the valve core can slide in the valve body, so that an inner hole channel on the valve core is coaxially communicated with an inlet pipeline and an outlet pipeline on the valve body, quantitative sampling is realized, and the dead volume is reduced; and the volume of the sample can be accurately sampled according to the sizes of the inner hole channel and the inlet and outlet pipelines on the valve body, so that the accuracy of sample injection is ensured, and the use is convenient.
Drawings
FIG. 1 is a block diagram of a liquid injection valve in one embodiment;
FIG. 2 is a schematic diagram of the valve core 300 in the structure shown in FIG. 1;
FIG. 3 is a schematic view of the first valve body housing 100 in the configuration shown in FIG. 1;
Fig. 4 is a schematic view of the second valve body case 200 in the structure shown in fig. 1.
Detailed Description
For a better understanding of the present utility model, the content of the present utility model will be further elucidated with reference to the drawings and examples, but the utility model is not limited to the examples described below.
It is to be understood that the terms "first," "second," and the like, as used herein, may be used to describe valve body housings, connecting bores, etc., but that these valve body housings, connecting bores are not limited by these terms. These terms are only used to distinguish a first valve body housing, connection aperture from another valve body housing, connection aperture. For example, a first valve body housing may be referred to as a second valve body housing, and similarly, a second valve body housing may be referred to as a first valve body housing, without departing from the scope of the application. Both the first valve body housing and the second valve body housing are valve body housings, but they are not the same valve body housing.
In one embodiment, as shown in fig. 1, the liquid phase sampling valve provided by the present utility model mainly includes: a first valve body housing 100, a second valve body housing 200, and a valve cartridge 300; the first valve body housing 100 is detachably connected with the second valve body housing 200 through a connecting member 400; the valve cartridge 300 is disposed between the first valve body housing 100 and the second valve body housing 200; wherein: grooves 500 are formed in the first valve body housing 100 and the second valve body housing 200, and the grooves 500 are used for accommodating the valve core 300; the bottom of the valve core 300 is provided with a dovetail groove 310, and sliding grooves 510 are arranged on the first valve body shell 100 and the second valve body shell 200 at positions corresponding to the dovetail groove 310; an inner hole channel 320 is arranged on the valve core 300, and a positioning protrusion 330 is arranged on one side of the valve core 300 close to the first valve body shell 100; a positioning groove 110 is provided on the first valve body housing 100 at a position opposite to the positioning protrusion 330; the first valve body shell 100 is provided with a pipeline inlet connecting hole 120 in a penetrating way, and the position of the pipeline inlet connecting hole 120 corresponds to the inner hole channel 320; a pipe outlet connection hole 210 is provided on the second valve body housing 200 at a position corresponding to the inner hole channel 320; when the spool 300 slides within the groove 500, the line inlet connection bore 120 or the line outlet connection bore 210 is in coaxial communication with the bore channel 320.
The shapes of the first valve body housing 100 and the second valve body housing 200 may be rectangular, cylindrical or other regular polyhedrons. The first valve body case 100 may be connected to the second valve body case 200 through the connection member 400, wherein the connection member 400 may be provided in plurality, uniformly distributed at edge positions of the first valve body case 100 and the second valve body case 200, thereby detachably connecting the first valve body case 100 and the second valve body case 200.
The valve core 300 may be disposed at an intermediate position between the first valve body housing 100 and the second valve body housing 200, and the valve core 300 may slide left and right at the intermediate position between the first valve body housing 100 and the second valve body housing 200, thereby realizing flow control sampling.
As shown in fig. 1, 2 and 3, two sides of the bottom of the valve core 300 extend outwards to form a dovetail groove 310, a plurality of inner hole channels 320 may be provided in the middle of the valve core 300, and a positioning protrusion 330 is provided on one side of the valve core 300 near the first valve body housing 100, for limiting the sliding distance of the valve core 300. The valve core 300 may be rectangular, and the positioning protrusions 330 may be two, and are respectively distributed at two opposite corners of one side of the valve core 300, which is close to the first valve body housing 100.
In order to facilitate the left-right sliding of the valve cartridge 300 at the intermediate position of the first and second valve body housings 100 and 200, grooves 500 are provided on both the first and second valve body housings 100 and 200, and the grooves 500 may be used to accommodate the valve cartridge 300. Wherein the shape of the groove 500 may correspond to the shape of the valve cartridge 300. Specifically, the positions of the first valve body housing 100 and the second valve body housing 200 corresponding to the dovetail groove 310 are provided with sliding grooves 510, the length of the sliding grooves 510 can be greater than that of the dovetail groove 310, the depth of the sliding grooves 510 can correspond to that of the dovetail groove 310, and the dovetail groove 310 can slide left and right on the sliding grooves 510, so that the valve core 300 is driven to slide left and right at the middle position of the first valve body housing 100 and the second valve body housing 200.
As shown in fig. 1, a positioning groove 110 is provided on the first valve body housing 100 at a position opposite to the positioning protrusion 330. Wherein the number of the positioning grooves 110 may be the same as the number of the positioning protrusions 330. The positioning groove 110 may be an elongated cavity, the positioning protrusion 330 may slide in the positioning groove 110, and the positioning groove 110 may limit a sliding range of the positioning protrusion 330.
A pipe inlet connection hole 120 is provided through the first valve body housing 100 for pipe connection. The line inlet connection bore 120 may be positioned to correspond to the bore channel 320 such that fluid enters the valve cartridge 300. Likewise, a pipe outlet connection hole 210 may be provided in the second valve body housing 200 at a position corresponding to the inner hole passage 320 such that the liquid flows out of the pipe outlet connection hole 210 from within the valve cartridge 300. During use, the valve core 300 slides in the groove 500, and quantitative sample injection can be performed when the valve core 300 slides to the pipeline inlet connection hole 120 or the pipeline outlet connection hole 210 and the inner hole channel 320 are coaxially communicated.
In this embodiment, by disposing the dovetail groove 310 at the bottom of the valve core 300, and disposing the sliding groove 510 on the first valve body housing 100 and the second valve body housing 200, the valve core 300 can slide inside the valve body, so that the inner hole channel 320 on the valve core 300 is coaxially communicated with the inlet and outlet pipelines on the valve body, thereby quantitatively injecting samples, and reducing the dead volume; and the volume of the sample can be accurately sampled according to the sizes of the inner hole channel 320 and the inlet and outlet pipelines on the valve body, so that the accuracy of sample injection is ensured, and the use is convenient.
In one embodiment, as shown in fig. 1, 3 and 4, the connecting member 400 is a screw; the first valve body housing 100 is uniformly provided with first connection holes 102; a second connection hole 202 is formed in the second valve body housing 200 at a position corresponding to the first connection hole 102; the first valve body housing 100 is coupled to the second valve body housing 200 by screws passing through the first coupling holes 102, 202.
As shown in fig. 1, 3 and 4, four first connection holes 102 may be provided on the first valve body housing 100; four second connection holes 202 may be provided on the second valve body case 200; the connecting pieces 400 may also be provided with four connecting holes, which respectively pass through the four first connecting holes 102 and the four second connecting holes 202, so as to connect the first valve body housing 100 with the second valve body housing 200, and when the connecting pieces 400 need to be disassembled, the connecting pieces 400 can be taken out from the connecting holes. Wherein the screw may be a fine screw.
The first valve body shell 100 and the second valve body shell 200 are connected and fixed by arranging the screws as the connecting pieces 400, so that the two valve body shells can be disassembled or assembled conveniently and rapidly, and the efficiency is high.
In one embodiment, three inner bore passages are provided and evenly distributed in the middle of the valve core. Wherein, three hole passageway can transversely arrange in proper order.
In one embodiment, the sliding length of the dovetail groove in the sliding groove is the same as the sliding length of the positioning protrusion in the positioning groove and the interval between the inner hole channels.
When the valve core slides in the valve body, in order to make the inner hole channel on the valve core coaxially communicated with the pipeline inlet connecting hole or the pipeline outlet connecting hole on the valve body, the sliding range of the valve core needs to be limited. Specifically, when the valve core moves, the whole valve core is driven to move mainly through the sliding of the dovetail groove at the bottom in the sliding groove, and when the valve core moves, the inner hole channel can be controlled to be communicated with the pipeline inlet connecting hole or the pipeline outlet connecting hole through the positioning protrusion and the positioning groove, so that loading and sample injection are completed, and the device has the advantages of being simple in structure and convenient to operate, and accuracy and reproducibility of sample injection are improved.
Specifically, in this embodiment, the sliding length of the dovetail groove in the chute is also required to be the same as the interval between the inner hole channels on the valve core, so that when the dovetail groove at the bottom slides in the chute, the pipeline inlet connection hole or the pipeline outlet connection hole on the valve body can accurately slide to the inner hole channel position on the valve core, thereby completing loading and sample injection.
In this embodiment, the sliding direction and distance of the spool can be limited by setting the sliding length of the dovetail groove in the chute to be the same as the sliding length of the positioning protrusion in the positioning groove, so that the dead volume can be reduced.
In one embodiment, the pipeline inlet connection hole and the pipeline outlet connection hole are respectively provided with two. The two pipeline inlet connecting holes can be transversely arranged, and the arrangement mode of the two pipeline outlet connecting holes is the same as that of the two pipeline inlet connecting holes. After the sliding of the valve core is completed, two of the three inner hole channels can be coaxially communicated with the two pipeline outlet connecting holes and the two pipeline inlet connecting holes, so that the dead volume can be reduced.
In one embodiment, sample injection pipelines are arranged in the three inner hole channels, and by arranging the sample injection pipelines, a thinner channel is not required to be etched on the valve core, so that the precision requirement on material processing can be greatly reduced, and the quantitative volume can be changed by adjusting the inner diameter of the sample injection pipelines; and the sample injection volume is determined by the inner diameter and the length of the sample injection pipeline, so that the accuracy and the reproducibility of sample injection can be ensured.
In one embodiment, the sample line has an outer diameter of 780 μm to 820 μm. Preferably, the outer diameter of the sample introduction pipe may be 800 μm, the inner diameter of the sample introduction pipe may be 25 μm, and the length of the sample introduction pipe may be 5mm. In this embodiment, the inner diameters of the three inner hole channels may be the same as the outer diameter of the sample injection pipeline, or may be 800 μm, that is, the inner hole channels are lined with sample injection pipelines having an outer diameter of 800 μm. Wherein, because the quantitative volume is changed through the internal diameter of the sample injection pipeline, when the internal diameter of the sample injection pipeline is 25 mu m, and the length is 5mm, nano-upgrading sample injection can be realized, and the accuracy of sample injection is improved.
In one embodiment, the feed line is made of a polyetheretherketone material.
In one embodiment, the separation distance between the three bore passages is 9mm to 11mm. Wherein the three inner hole channels may be three equidistant round holes with a diameter of 800 μm, preferably the interval between the three inner hole channels may be 10mm, which are punched using a laser punching device.
In one embodiment, the first valve body housing and the second valve body housing are each made of a stainless steel material.
The application method of the liquid phase sample injection valve provided by the utility model comprises the following steps:
Connecting a pipeline inlet connecting hole on a first valve body shell in the liquid phase sampling valve with a sample injector, and connecting a pipeline outlet connecting hole on a second valve body shell with a liquid chromatograph;
The first valve body shell is connected with the second valve body shell through a connecting piece, wherein the valve core is arranged between the first valve body shell and the second valve body shell and can slide;
Starting the liquid chromatograph, and filling mobile phases in all pipelines under the thrust action of the liquid phase constant flow pump;
The sample injector pushes the sample, so that the sample inlet phase valve is in a loading state;
Starting a liquid phase sample injection valve, sliding a valve core by 10mm, and enabling the liquid phase sample injection valve to be in a sample injection state, wherein under the thrust action of a liquid phase constant flow pump, a sample originally entering an inner hole channel enters a liquid phase chromatographic pipeline to finish sample injection at the time, so that accurate quantitative sample injection is realized.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A liquid phase injection valve, comprising: the valve comprises a first valve body shell, a second valve body shell and a valve core; the first valve body shell is detachably connected with the second valve body shell through a connecting piece; the valve core is arranged between the first valve body shell and the second valve body shell; wherein:
Grooves are formed in the first valve body shell and the second valve body shell, and the grooves are used for accommodating the valve cores; the bottom of the valve core is provided with a dovetail groove, and sliding grooves are formed in positions, corresponding to the dovetail groove, of the first valve body shell and the second valve body shell;
An inner hole channel is formed in the valve core, and a positioning protrusion is arranged on one side, close to the first valve body shell, of the valve core; a positioning groove is formed in the first valve body shell at the position opposite to the positioning protrusion;
a pipeline inlet connecting hole is arranged on the first valve body shell in a penetrating manner, and the position of the pipeline inlet connecting hole corresponds to the inner hole channel; a pipeline outlet connecting hole is formed in the position, corresponding to the inner hole channel, of the second valve body shell;
when the valve core slides in the groove, the pipeline inlet connecting hole or the pipeline outlet connecting hole is coaxially communicated with the inner hole channel.
2. The liquid phase injection valve of claim 1 wherein said connector is a screw; the first valve body shell is uniformly provided with first connecting holes; a second connecting hole is formed in the second valve body shell at a position corresponding to the first connecting hole; the screw penetrates through the first connecting hole and the second connecting hole to connect the first valve body shell with the second valve body shell.
3. The liquid phase sampling valve according to claim 1, wherein three inner hole channels are provided and uniformly distributed in the middle of the valve core.
4. The liquid phase sampling valve according to claim 3, wherein the sliding length of the dovetail groove in the sliding groove is the same as the sliding length of the positioning protrusion in the positioning groove and the interval between the inner hole channels.
5. The liquid phase sampling valve according to claim 3, wherein two pipeline inlet connecting holes and two pipeline outlet connecting holes are arranged.
6. The liquid phase sampling valve according to claim 3, wherein sampling pipes are disposed in each of the three inner hole channels.
7. The liquid-phase injection valve of claim 6 wherein the injection line has an outer diameter of 780 μm to 820 μm.
8. The liquid phase injection valve of claim 6 wherein said injection line is made of a polyetheretherketone material.
9. The liquid-phase injection valve of claim 3 wherein the three internal bore channels are spaced apart by a distance of 9mm to 11mm.
10. The liquid phase injection valve of claim 1 wherein said first valve body housing and said second valve body housing are each made of stainless steel material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322664112.4U CN220819932U (en) | 2023-10-07 | 2023-10-07 | Liquid phase sampling valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322664112.4U CN220819932U (en) | 2023-10-07 | 2023-10-07 | Liquid phase sampling valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220819932U true CN220819932U (en) | 2024-04-19 |
Family
ID=90673967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322664112.4U Active CN220819932U (en) | 2023-10-07 | 2023-10-07 | Liquid phase sampling valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220819932U (en) |
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2023
- 2023-10-07 CN CN202322664112.4U patent/CN220819932U/en active Active
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