CN216771504U - Liquid sample injector combined with infrared spectrometer and infrared spectrum analysis system - Google Patents
Liquid sample injector combined with infrared spectrometer and infrared spectrum analysis system Download PDFInfo
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- CN216771504U CN216771504U CN202122589625.4U CN202122589625U CN216771504U CN 216771504 U CN216771504 U CN 216771504U CN 202122589625 U CN202122589625 U CN 202122589625U CN 216771504 U CN216771504 U CN 216771504U
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Abstract
The utility model belongs to the technical field of analytical instruments, and discloses a liquid sample injector combined with an infrared spectrometer and an infrared spectroscopic analysis system, wherein the liquid sample injector comprises a sampling system, a first three-way valve, a sample tube, a second three-way valve, an injector and a controller, and the sampling system is used for collecting liquid to be detected from a sample bottle; a first branch port of the first three-way valve is used for being communicated with the sampling system through a pipeline, and a second branch port of the first three-way valve is used for being communicated with the detection equipment through a pipeline; a fourth branch port of the second three-way valve is communicated with a third branch port of the first three-way valve through a sample pipe, and a fifth branch port is used for being communicated with a waste liquid pipe through a pipeline; the injector is communicated with the sixth branch port of the second three-way valve through a pipeline. The controller controls the on-off of the first three-way valve and the second three-way valve and the starting of the injector to execute the rinsing of a new sample, and then the new sample is pushed into the detection equipment, so that the automatic liquid sample introduction and the automatic cleaning of a pipeline are realized, and the efficiency is greatly improved.
Description
Technical Field
The utility model belongs to the technical field of analytical instruments, particularly relates to a liquid sample injector combined with an infrared spectrometer, and further relates to an infrared spectrum analysis system.
Background
This section provides background information related to the present disclosure only and is not necessarily prior art.
Due to the need for scientific research development, there is also an increasing number of samples for infrared analysis of liquids. At present, no commercial system for liquid automatic sample introduction combined with infrared spectroscopic analysis exists.
SUMMERY OF THE UTILITY MODEL
The utility model aims to at least solve the problem that no liquid sample injector suitable for liquid infrared analysis exists in the prior art, and the aim is realized by the following technical scheme:
in a first aspect, the utility model provides a liquid injector for use with an infrared spectrometer, comprising:
the sampling system is used for collecting liquid to be measured from the sample bottle;
the sampling device comprises a first three-way valve, a second three-way valve and a third three-way valve, wherein the first three-way valve is provided with a first branch port, a second branch port and a third branch port which can be mutually communicated, the first branch port is used for being communicated with a sampling system through a pipeline, and the second branch port is used for being communicated with a detection device through a pipeline;
a sample tube;
a second three-way valve having a fourth branch port, a fifth branch port and a sixth branch port which can be communicated with each other, the fourth branch port being communicated with the third branch port of the first three-way valve through the sample tube, the fifth branch port being used for communicating a waste liquid tube through a pipeline;
an injector communicated with the sixth branch port of the second three-way valve through a pipeline;
and the controller is electrically connected with the sampling system, the first three-way valve, the second three-way valve and the injector.
The liquid sample injector combined with the infrared spectrometer controls the on-off of the first three-way valve and the second three-way valve and the starting of the injector through the controller, so that the liquid sample injector firstly performs the rinsing of a new sample and then pushes the new sample into the detection equipment, the automatic sample injection of liquid is realized, the automatic cleaning of a pipeline is realized, and the efficiency is greatly improved.
In addition, the liquid injector according to the present invention may have the following additional features:
in some embodiments of the present invention, the sampling system comprises a sample tray for carrying sample bottles, a positioning device connected to the positioning device, and a needle communicating with the first port via a conduit, the positioning device being configured to align the needle with the sample bottles and insert the needle into the sample bottles.
In some embodiments of the utility model, the positioning device comprises:
a frame;
an X-axis positioning unit connected to the frame so as to be movable in a horizontal direction of the frame;
the Y-axis positioning unit is connected with the X-axis positioning unit;
and the Z-axis positioning unit is connected with the Y-axis positioning unit in a manner of moving along the horizontal direction of the Y-axis positioning unit, the needle head is connected with the Z-axis positioning unit, and the Z-axis positioning unit can control the needle head to move along the vertical direction.
In some embodiments of the present invention, the Z-axis positioning unit includes a first lead screw mechanism, a second lead screw mechanism and a pressing plate, the first lead screw mechanism is used for driving the second lead screw mechanism to move along the vertical direction, the second lead screw mechanism is used for driving the needle head to move along the vertical direction, and the pressing plate is horizontally arranged and connected with the bottom end of the second lead screw mechanism.
In some embodiments of the utility model, the liquid injector used with the infrared spectrometer further comprises a hydrocarbon sensor for monitoring the liquid injector for the presence of a leak of oil liquid.
In some embodiments of the utility model, the liquid injector for use with an infrared spectrometer further comprises a buzzer electrically connected to the hydrocarbon sensor.
In some embodiments of the present invention, the sample tray is provided with a plurality of pits for placing sample bottles, and the plurality of pits are distributed in an array.
In some embodiments of the utility model, the liquid injector used in conjunction with the infrared spectrometer further comprises a wash vial disposed within the range of motion of the needle.
In some embodiments of the utility model, the syringe is a metered dose pump.
A second aspect of the present invention provides an infrared spectroscopic analysis system, comprising an infrared spectrometer and a liquid sample injector, wherein the liquid sample injector is the liquid sample injector provided in the first aspect of the present invention and used in combination with the infrared spectrometer, and the infrared spectrometer is communicated with a second branch port of a first three-way valve of the liquid sample injector.
The infrared spectroscopic analysis system of the second aspect of the present invention has the same beneficial effects as the liquid sample injector for use with an infrared spectrometer of the first aspect of the present invention, and will not be described herein again.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also, like parts are designated by like reference numerals throughout the drawings. In the drawings:
fig. 1 schematically shows a schematic configuration of a liquid injector for use with an infrared spectrometer according to an embodiment of the present invention.
FIG. 2 schematically shows a schematic of a sampling system for a liquid injector used with an infrared spectrometer according to an embodiment of the utility model;
FIG. 3 schematically shows a schematic of a Z-axis positioning unit of a liquid injector for use with an infrared spectrometer according to an embodiment of the utility model;
the reference symbols in the drawings denote the following:
10: first three-way valve, 11: second three-way valve, 12: first branch port, 13: second branch port, 14: third branch port, 15: fourth branch port, 16: fifth branch port, 17: sixth branch port, 18: sample tube, 19: an injector;
20: sampling system, 21: sample tray, 22: needle head, 23: x-axis positioning unit, 24: y-axis positioning unit, 25: z-axis positioning unit, 26: first screw mechanism, 27: second screw mechanism, 28: pressing plate, 29: a frame;
30: detection device, 31: a waste liquid pipe.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a," "an," and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.
Although the terms, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, an element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
For convenience of description, spatially relative terms, such as "inner", "outer", "inner", "side", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
As shown in fig. 1 to fig. 3, a first aspect of the present invention provides a liquid sampler for use with an infrared spectrometer, comprising a sampling system 20, a first three-way valve 10, a sample tube 18, a second three-way valve 11, an injector 19, and a controller, wherein the sampling system 20 is configured to collect a liquid to be measured from a sample bottle; the first three-way valve 10 is provided with a first branch port 12, a second branch port 13 and a third branch port 14 which can be mutually communicated, wherein the first branch port 12 is used for being communicated with the sampling system 20 through a pipeline, and the second branch port 13 is used for being communicated with the detection device 30 through a pipeline; the second three-way valve 11 has a fourth branch 15, a fifth branch 16 and a sixth branch 17 which can be communicated with each other, the fourth branch 15 is communicated with the third branch 14 of the first three-way valve 10 through a sample tube 18, and the fifth branch 16 is used for communicating with a waste liquid tube 31 through a pipeline; the injector 19 is communicated with the sixth branch port 17 of the second three-way valve 11 through a pipeline; the controller is electrically connected to the sampling system 20, the first three-way valve 10, the second three-way valve 11, and the injector 19.
It should be noted that the liquid sample injector is an automatic control device, and the liquid sample injector is controlled to inject sample by a preset program, and the sampling system 20 may be a structure in which the needle 22 is electrically controlled to move vertically to insert a sample bottle, or the XYZ three-coordinate positioning sampling system 20 of the present invention. The first three-way valve 10 and the second three-way valve 11 are electric three-way valves, and branch ports communicated with the electric three-way valves are controlled by a controller, and a third branch port 14 is a public end: when the power is not on, the first branch port 12 is communicated with the third branch port 14; when the power is on, the valve switches the third branch port 14 to be communicated with the second branch port 13. Only one of the branches can be connected. The syringe 19 may be a syringe pump or a plunger pump, and is not limited thereto. For the consideration of durability, the pipeline in the liquid sample injector adopts a metal pipeline or a PEEK (polyether-ether-ketone) pipeline.
The liquid sample injector combined with the infrared spectrometer controls the on-off of the first three-way valve 10 and the second three-way valve 11 and the starting of the injector 19 through the controller, so that the liquid sample injector firstly performs the rinsing of a new sample, and then pushes the new sample into the detection equipment 30, thereby realizing the automatic sample injection of liquid and the automatic cleaning of pipelines and greatly improving the efficiency.
In some embodiments of the present invention, the sampling system 20 comprises a sample tray 21 for carrying sample bottles, a positioning device to which the needle 22 is connected, and a needle 22 for aligning the needle 22 with a sample bottle and piercing the needle 22 into the sample bottle.
It will be appreciated that the sample plate 21 is a generally square plate. The positioning device may be an electrically controlled vertical motion mechanism or an electrically controlled three-coordinate positioning mechanism, and the positioning device controls the movement of the needle 22 to complete the insertion of the needle 22 into the sample bottle.
Specifically, the positioning device includes:
a frame 29;
an X-axis positioning unit 23 fixed to the frame 29;
a Y-axis positioning unit 24, the right side of which is connected with the X-axis slider positioning unit 23 and the left side of which is connected with the slider;
and a Z-axis positioning unit 25 fixed to the Y-axis slider.
It should be noted that the X-axis positioning unit 23 may be a motor-driven lead screw, and the lead screw module is screwed to the frame 29 to move along the horizontal direction of the frame 29.
The Y-axis positioning unit 24 and the X-axis positioning unit 23 can form a 90-degree motion direction, and the components of the Z-axis positioning unit 25 are in a structure of driving a screw rod by a motor.
The movement of the needle 22 in the vertical direction may be achieved by means of a screw mechanism or a motor driven screw.
Further, the Z-axis positioning unit 25 includes a first lead screw mechanism 26, a second lead screw mechanism 27, and a pressing plate 28, the first lead screw mechanism 26 is used for driving the second lead screw mechanism 27 to move in the vertical direction, the second lead screw mechanism 27 is used for driving the needle 22 to move in the vertical direction, and the pressing plate 28 is horizontally disposed and connected with the bottom end of the second lead screw mechanism 27.
The sample injection steps of the liquid sample injector are as follows:
1) controlling the positioning device to enable the needle 22 to be inserted into the sample bottle, controlling the first three-way valve 10 to enable the first branch port 12 to be communicated with the third branch port 14, controlling the second three-way valve 11 to enable the fourth branch port 15 to be communicated with the sixth branch port 17, and controlling the injector 19 to pump liquid into the injector 19;
2) controlling the second three-way valve 11 to switch, so that the fifth branch port 16 is communicated with the sixth branch port 17, controlling the injector 19 to discharge the liquid, and finishing pipeline cleaning or new sample rinsing;
3) controlling the first three-way valve 10 to communicate the first branch port 12 with the third branch port 14, controlling the second three-way valve 11 to communicate the fourth branch port 15 with the sixth branch port 17, and controlling the syringe 19 to draw the liquid into the syringe 19;
4) and controlling the first three-way valve 10 to switch so that the second branch port 13 is communicated with the third branch port 14, and controlling the injector 19 to push out the liquid so that the liquid in the sample tube 18 is pushed out of the detection device 30, thereby completing sample injection.
In some embodiments of the utility model, the liquid injector further comprises a hydrocarbon sensor for monitoring the liquid injector for oil liquid leaks.
Further, the liquid sample injector also comprises a buzzer, and the buzzer is electrically connected with the hydrocarbon sensor. When an oil sample is made, if gasoline and the like have leakage and can cause larger potential safety hazards, a hydrocarbon sensor and a buzzer are added, so that the leakage of the gasoline can be detected in time.
In some embodiments of the present invention, the sample tray 21 is provided with a plurality of pits for placing sample bottles, the plurality of pits are distributed in an array, and can place a plurality of sample bottles, and the sample bottles are sequentially fed into the infrared analyzer for detection through program control.
In some embodiments of the utility model, the liquid injector further comprises a wash vial disposed within the range of motion of the needle 22. After the sample injection operation is completed, the needle 22 needs to be cleaned, and the needle 22 can be controlled to move into the cleaning bottle and be cleaned by professional cleaning liquid.
In some embodiments of the utility model, the syringe 19 is a metered dose pump, such as a plunger pump or syringe pump.
In a second aspect, the present invention provides an infrared spectroscopic analysis system, comprising an infrared spectrometer and a liquid sample injector, wherein the liquid sample injector is the liquid sample injector provided in the first aspect of the present invention and used in combination with the infrared spectrometer, and the infrared spectrometer is communicated with the second branch port 13 of the first three-way valve 10 of the liquid sample injector.
The infrared spectroscopic analysis system of the second aspect of the present invention has the same beneficial effects as the liquid sample injector for use with an infrared spectrometer of the first aspect of the present invention, and will not be described herein again.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A liquid injector for use with an infrared spectrometer, comprising:
the sampling system is used for collecting liquid to be measured from the sample bottle;
the device comprises a first three-way valve, a second three-way valve and a third three-way valve, wherein the first three-way valve is provided with a first branch port, a second branch port and a third branch port which can be mutually communicated, the first branch port is used for being communicated with a sampling system through a pipeline, and the second branch port is used for being communicated with a detection device through a pipeline;
a sample tube;
a second three-way valve having a fourth branch port, a fifth branch port and a sixth branch port which can be communicated with each other, the fourth branch port being communicated with the third branch port of the first three-way valve through the sample tube, the fifth branch port being used for communicating a waste liquid tube through a pipeline;
an injector communicated with the sixth branch port of the second three-way valve through a pipeline;
and the controller is electrically connected with the sampling system, the first three-way valve, the second three-way valve and the injector.
2. The liquid injector as claimed in claim 1, wherein the sampling system comprises a sample tray for holding sample vials, a positioning device connected to the positioning device, and a needle in fluid communication with the first port, the positioning device being configured to align the needle with the sample vials and to pierce the needle into the sample vials.
3. The liquid injector for use with an infrared spectrometer of claim 2, wherein the positioning device comprises:
a frame;
an X-axis positioning unit connected to the frame so as to be movable in a horizontal direction of the frame;
the Y-axis positioning unit is connected with the X-axis positioning unit;
the Z-axis positioning unit is connected with the Y-axis positioning unit in a mode of moving along the horizontal direction of the Y-axis positioning unit, the needle head is connected with the Z-axis positioning unit, and the Z-axis positioning unit can control the needle head to move along the vertical direction.
4. The liquid injector as claimed in claim 3, wherein the Z-axis positioning unit comprises a first lead screw mechanism for driving the second lead screw mechanism to move in a vertical direction, a second lead screw mechanism for driving the needle to move in a vertical direction, and a pressing plate horizontally disposed and connected to a bottom end of the second lead screw mechanism.
5. The liquid injector in combination with an infrared spectrometer of claim 1, further comprising a hydrocarbon sensor for monitoring the liquid injector for the presence of a leak of oil liquid.
6. The liquid injector in combination with an infrared spectrometer of claim 5, further comprising a buzzer electrically coupled to the hydrocarbon sensor.
7. The liquid sample injector as claimed in claim 2, wherein the sample tray has a plurality of wells for receiving the sample bottles, and the plurality of wells are arranged in an array.
8. The liquid injector in combination with an infrared spectrometer of claim 2, further comprising a wash bottle disposed within the range of motion of the needle.
9. The liquid injector according to any of claims 1 to 8, characterized in that the syringe is a quantitative pipette pump.
10. An infrared spectroscopic analysis system comprising an infrared spectrometer and a liquid injector according to any one of claims 1 to 9, the liquid injector being used in combination with the infrared spectrometer, the infrared spectrometer being in communication with the second branch port of the first three-way valve of the liquid injector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122589625.4U CN216771504U (en) | 2021-10-26 | 2021-10-26 | Liquid sample injector combined with infrared spectrometer and infrared spectrum analysis system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122589625.4U CN216771504U (en) | 2021-10-26 | 2021-10-26 | Liquid sample injector combined with infrared spectrometer and infrared spectrum analysis system |
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| Publication Number | Publication Date |
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| CN216771504U true CN216771504U (en) | 2022-06-17 |
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| CN202122589625.4U Active CN216771504U (en) | 2021-10-26 | 2021-10-26 | Liquid sample injector combined with infrared spectrometer and infrared spectrum analysis system |
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| CN (1) | CN216771504U (en) |
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- 2021-10-26 CN CN202122589625.4U patent/CN216771504U/en active Active
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Inventor after: Jiang Hai Inventor after: Qi Xiaoran Inventor before: Jiang Hai |
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| CB03 | Change of inventor or designer information |