CN112362719B - Airflow flow control device and ion mobility spectrometer - Google Patents
Airflow flow control device and ion mobility spectrometer Download PDFInfo
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- CN112362719B CN112362719B CN201910678189.2A CN201910678189A CN112362719B CN 112362719 B CN112362719 B CN 112362719B CN 201910678189 A CN201910678189 A CN 201910678189A CN 112362719 B CN112362719 B CN 112362719B
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/62—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode
- G01N27/622—Ion mobility spectrometry
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J49/00—Particle spectrometers or separator tubes
- H01J49/02—Details
- H01J49/04—Arrangements for introducing or extracting samples to be analysed, e.g. vacuum locks; Arrangements for external adjustment of electron- or ion-optical components
- H01J49/0422—Arrangements for introducing or extracting samples to be analysed, e.g. vacuum locks; Arrangements for external adjustment of electron- or ion-optical components for gaseous samples
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Abstract
The invention relates to an airflow flow control device and an ion mobility spectrometer, wherein the airflow flow control device comprises an air supply device, a flow dividing device and a first flow control assembly, the flow dividing device is provided with a first inner cavity, a first air inlet and a first air outlet, the first air inlet and the first air outlet are communicated with the first inner cavity, and one air flow sent by the air supply device is divided into multiple paths of airflows through the arrangement of the flow dividing device for different air utilization equipment or different air inlet ports of the air utilization equipment to supply air; the first flow control assembly is hermetically connected in the first inner cavity and is positioned between the first air inlet and the first air outlet, a plurality of first flow control holes are formed in the first flow control assembly, the apertures of the first flow control holes are different, and flow regulation control of multiple paths of air flows can be realized through the arrangement of the first flow control holes due to different flow control holes with different corresponding flow rates under specific pressure; compared with the existing mass flow controllers, needle valves, multi-way valves and the like, the flow control valve has the advantages of simple structure, accurate flow control and convenient adjustment operation.
Description
Technical Field
The invention relates to the technical field of ion mobility spectrometry, in particular to an airflow flow control device and an ion mobility spectrometer.
Background
The ion mobility spectrometer is an instrument for converting molecules to be detected into charged ions, the charged ions move under the action of a migration electric field and collide continuously in a gas environment, and finally, different ions are distinguished by analyzing the moving speed of the charged ions. The gas environment can be pure gas such as nitrogen, argon and the like, or air; generally, relatively pure and stable properties are required.
In the instrument, the gas is not only responsible for providing a stable collision gas, but also for bringing the sample into the ion source region in order to ionize the sample to be measured, sometimes with the gas being split for other purposes. However, in general, the number of air pumps or air cylinders for providing air movement is limited, and it is impossible to use one pump for each path of air to provide flow, so that a flow dividing structure is required to divide one path into multiple paths, and a flow controller or the like is required to achieve the purpose of controlling the air flow of each path.
Most of flow controllers applied to the existing ion mobility spectrometers adopt mass flow controllers to realize accurate control of the flow of each branch gas path, and the mass flow controllers have the defects of high manufacturing cost, large volume and the like although the accurate control of the air flow can be realized; some of the valves also adopt needle valves for flow control, but the valves have the defect of difficult adjustment when the valves are used for flow control, so that accurate control cannot be realized; in addition, the part directly adopts tee joint or multi-way, and the defect of large airflow flow fluctuation exists when the tee joint or multi-way is adopted for flow control, so that the accurate control cannot be realized; the flow control structures are simple in structure and convenient to adjust when the flow cannot be accurately controlled.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the technical problems in the prior art.
An airflow rate control device of the present invention includes:
an air supply device;
the flow dividing device is provided with a first inner cavity, at least one first air inlet and at least two first air outlets, wherein the first air inlet and the at least two first air outlets are communicated with the first inner cavity; the first air inlet is communicated with the air supply device through a first pipeline;
the first flow control assembly is provided with a first flow control component, the periphery of which is hermetically arranged in a first inner cavity of the flow dividing device and is positioned between the first air inlet and the first air outlet, the first flow control component is provided with a plurality of first flow control holes, and the apertures of at least part of the first flow control holes are different; and the first flow control channels are used for correspondingly and hermetically communicating at least one first flow control hole with one first air outlet, and any two adjacent first flow control channels are hermetically separated.
Preferably, in the airflow rate control device, the first flow control holes are in one-to-one correspondence with the first air outlets.
Preferably, in the airflow flow control device, the first flow control hole is connected with the corresponding first air outlet in a sealing manner through a second pipeline, and the second pipeline is used as the first flow control channel.
Preferably, in the airflow rate control device, the apertures of all the first flow control holes are different.
Preferably, the airflow flow control device further comprises a converging device, wherein the converging device is provided with a second inner cavity, at least one second air outlet and at least two second air inlets, wherein the second air outlet and the at least two second air inlets are communicated with the second inner cavity, and all the second air inlets are communicated with the air utilization equipment through a third pipeline;
the second flow control assembly is provided with a second flow control component, the periphery of which is hermetically arranged in a second inner cavity of the converging device and is positioned between the second air inlet and the second air outlet, the second flow control component is provided with a plurality of second flow control holes, and the apertures of at least part of the second flow control holes are different; and the second flow control channels are used for correspondingly and hermetically communicating at least one second flow control hole with one second air inlet, and any two adjacent second flow control channels are hermetically separated.
Preferably, in the airflow flow control device, the second flow control hole is connected with the corresponding second air inlet in a sealing manner through a fourth pipeline, and the fourth pipeline is used as the second flow control channel.
Preferably, the airflow flow control device further comprises a filter component arranged on the first flow control channel and/or the second flow control channel, and at least one filter hole is arranged on the filter component.
Preferably, in the airflow rate control device, the first flow control component and/or the second flow control component are/is a plate.
Preferably, the air flow control device comprises a first air flow control hole and a second air flow control hole, wherein the first air flow control hole and the second air flow control hole are round holes, square holes or special-shaped holes.
Another object of the present invention is to provide an ion mobility spectrometer, including any one of the airflow control devices described above, wherein the plurality of first air outlets are in one-to-one correspondence with air inlet ports of the ion mobility spectrometer through a third pipeline.
The technical scheme of the invention has the following advantages:
1. the invention provides an airflow flow control device, which comprises an air supply device, a flow dividing device and a first flow control assembly, wherein the flow dividing device is provided with a first inner cavity, a first air inlet and a first air outlet, the first air inlet and the first air outlet are communicated with the first inner cavity, and one path of airflow sent by the air supply device is divided into multiple paths of airflows by the arrangement of the flow dividing device so as to supply different air utilization equipment or different air inlet ports of the air utilization equipment for air intake; the first flow control assembly is hermetically connected in the first inner cavity and is positioned between the first air inlet and the first air outlet, a plurality of first flow control holes are formed in the first flow control assembly, the apertures of the first flow control holes are different, and flow regulation control of multiple paths of air flows can be realized through the arrangement of the first flow control holes due to different flow control holes with different corresponding flow rates under specific pressure; compared with the existing mass flow controller, flow control structures such as needle valve and multi-way valve, the flow control structure is simple in structure, accurate in flow adjustment and convenient to adjust and operate.
2. The invention provides an airflow flow control device, which also comprises a converging device, wherein the converging device is provided with a second inner cavity, a second air inlet and a second air outlet which are communicated with the second inner cavity, and airflows of different air utilization equipment or different air outlet ports of the air utilization equipment are converged by the converging device and then conveyed to an air delivery device for recycling.
3. The ion mobility spectrometer provided by the invention is communicated with the airflow flow control device in a sealing way through the pipeline, one path of airflow in the air supply device is divided into multiple paths of airflows for air intake of different air inlet ports of the air utilization device through the flow dividing device, and the flow of each path of airflow is accurately controlled through the arrangement of the first flow control assembly and the first flow control holes with different apertures so as to realize the airflow requirements of different flow rates of different air inlet ports of the air utilization device; the airflow flow control device has the advantages of simple structure, accurate flow control, simple and convenient operation and strong practicability.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an airflow rate control device according to the present invention.
Reference numerals illustrate:
1-an air supply device;
2-split device;
3-a first flow control aperture;
4-gas utilization equipment;
5-a first pipe;
6-a third pipeline;
7-confluence means;
8-a second flow control aperture;
9-a fifth pipe;
10-sixth conduit;
11-filter element.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
Example 1
An airflow flow control device of the embodiment, as shown in fig. 1, includes an air supply device 1, a flow dividing device 2, a first flow control assembly, a converging device 7, a second flow control assembly and a filter element 11, wherein the air supply device 1 is an adjustable air pump or an air bottle with an adjustable air pump; the flow dividing device 2 is internally provided with a first inner cavity (not shown) and a first air inlet (not shown) and five first air outlets (not shown) which are respectively communicated with the first inner cavity, and the first air inlet is communicated with the air supplying device 1 in a sealing way through a first pipeline 5; the periphery of the first flow control assembly is hermetically arranged in the first inner cavity of the flow dividing device 2, the first flow control assembly comprises a first flow control part positioned between the first air inlet and the first air outlet, five first flow control holes 3 are arranged on the first flow control part, the apertures of the five first flow control holes 3 are different and are 0.01-3mm, and the apertures of the five first flow control holes 3 can be selected from 0.1mm, 0.2mm, 0.3mm, 0.4mm and 0.5mm; the number of the first air outlets is not limited to five, but may be two, three, four, six, etc., and correspondingly, the number of the first air outlets 3 is not limited to five, but may be two, three, four, five, etc.; alternatively, the apertures of the first flow control holes 3 are not limited to be all different, and may be partially the same or partially different; the five first flow control holes 3 are arranged in one-to-one correspondence with the five first air outlets, the five first flow control holes 3 are communicated with the five first air outlets in a sealing way through first flow control channels, namely, one flow control hole is communicated with the first air outlets through one first flow control channel, two adjacent first flow control channel brackets are separated, and the five first air outlets are communicated with five air inlet ports of the air utilization equipment 4 in one-to-one correspondence in a sealing way through five third pipelines 6; alternatively, the number of the first flow control holes 3 may not correspond to the number of the first air outlets, and may be that one first flow control hole 3 corresponds to a plurality of first air outlets or that a plurality of first flow control holes 3 corresponds to one first air outlet; optionally, the first flow control channel is a second pipeline, and the first flow control hole 3 is in sealing connection with the corresponding first air outlet through the second pipeline; alternatively, the gas-using device 4 is an ion mobility spectrometer or a mass spectrometer.
The converging device 7 has a structure opposite to that of the flow dividing device 2, and is provided with a second inner cavity (not shown), five second air inlets (not shown) communicated with the second inner cavity and a first air outlet (not shown), wherein the five second air inlets are respectively communicated with five air outlet ports of the air utilization equipment 4 in a sealing way through five fifth pipelines 9; the second flow control assembly has the same structure as the first flow control assembly, is provided with a second flow control part, the periphery of which is arranged in the second inner cavity in a sealing way and is positioned between the second air inlet and the second air outlet, five second flow control holes 8 are arranged on the second flow control part, the apertures of the five second flow control holes 8 are different, the five second flow control holes 8 are communicated with the five second air inlets in a sealing way through five second flow control channels (not shown), and two adjacent second flow control channels are separated in a sealing way; the second air outlet is communicated with the air supply device 1 in a sealing way through a sixth pipeline 10; optionally, the second flow control channel is a fourth pipeline; alternatively, the number of the second air inlets is not limited to five, but may be other numbers, such as one, two, three, four, six, etc., and correspondingly, the number of the second air inlets 8 is not limited to five, but may be one, two, three, four, six, etc.; alternatively, the apertures of the second flow control holes 8 are not limited to be all different, and may be partially identical or partially different; the second air inlets and the second flow control holes 8 are not in one-to-one correspondence, and one second air inlet can also correspond to a plurality of second flow control holes 8 or one second flow control hole 8 corresponds to a plurality of second air inlets; in addition, alternatively, the main purpose of the converging device 7 is to merge the air flows of the plurality of air outlet ports of the air utilization apparatus 4 and then re-input the air flows into the air supply device 1 for recycling, so that the converging device 7 may not be provided with a second flow control assembly.
The first flow control component and the second flow control component are plate-shaped, and the first flow control hole 3 and the second flow control hole 8 can be round holes, square holes or special-shaped holes with other shapes, and are not limited in particular; optionally, the materials of the first flow control member and the second flow control member may be ceramic, stainless steel, plastic, etc., which are not limited specifically, and may be selected by those skilled in the art according to practical situations.
The first flow control assembly can be composed of a plurality of plate-shaped first flow control components, each first flow control component is arranged corresponding to one first air outlet, each first flow control component is provided with one first flow control hole 3, or can be composed of only one first flow control component, and a plurality of first flow control holes 3 are arranged on the first flow control component at intervals; the detachable structure can be inserted and installed in the first inner cavity of the shunt device 2, and the structure integrated with the shunt device 2 can also be adopted; similarly, the second flow control assembly can also be formed by a plurality of second flow control components, each second flow control component is arranged corresponding to one second air outlet, each first flow control component is provided with one second flow control hole 8, or can be formed by only one second flow control component, and a plurality of second flow control holes 8 are arranged on the second flow control component at intervals; the detachable structure can be inserted and installed in the second inner cavity of the confluence device 7, and the detachable structure can also be integrated with the confluence device 7. For example, the first flow control member and the second flow control member are both plate-shaped flow control plates.
The first duct 5 is provided with a filter element 11 for filtering the air flow outputted from the air supply device 1 to ensure the purity of the air used by the air using device 4.
Optionally, a filter component (not shown) is arranged in the first flow control channel and/or the second flow control channel, and a filter hole is formed in the filter component, and optionally, the filter component is a filter screen; the filter plate can also be a filter plate, and a filter screen is arranged on the filter plate corresponding to the first air outlet. That is, the filter member may be provided only in the first flow control passage, the filter member may be provided only in the second flow control passage, and the filter member may be provided in both the first flow control passage and the second flow control passage. Optionally, filter elements are also provided on the first duct 5, the third duct 6, the fifth duct 9 and the sixth duct 10.
Optionally, the aperture range of the first flow control hole 3 and the second flow control hole 8 is 0.1mm-0.3mm, the first flow control component and the second flow control component adopt steel sheets with the thickness of 0.1mm, and the relation of pressure flow is as follows:
because the corresponding flow rates of the flow control holes with different apertures are different under specific pressure, the flow rate of the air flow of the branch can be accurately realized by adopting the flow control holes with different apertures in the flow control component, and the flow rate adjusting device is simple in structure and convenient to adjust.
Example 2
The ion mobility spectrometer comprises the airflow flow control device in the embodiment 1, wherein five first air outlets of the flow dividing device are respectively in one-to-one corresponding sealing communication with five air inlet ports of the ion mobility spectrometer through five third pipelines 6, and five air outlet ports of the ion mobility spectrometer are respectively in one-to-one corresponding sealing communication with five second air inlets of the converging device 7 through five fifth pipelines 9;
the five air inlet ports are different in air inlet flow, air flow split is realized on the five first air outlets through the splitting device 2, and the flow of each path of air flow is accurately controlled through the five first flow control holes 3 of the first flow control assembly.
Alternatively, the intake ports may be not limited to just five, but may be other numbers, such as one, two, and so on; similarly, the outlet ports may be not limited to five, but may be other numbers, such as one, two, etc.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (9)
1. An airflow rate control device, comprising:
an air supply device (1);
the flow dividing device (2) is provided with a first inner cavity, at least one first air inlet and at least two first air outlets, wherein the first air inlet and the at least two first air outlets are communicated with the first inner cavity; the first air inlet is communicated with the air supply device (1) through a first pipeline (5);
the first flow control assembly is provided with a first flow control component, the periphery of which is hermetically arranged in a first inner cavity of the flow dividing device (2) and is positioned between the first air inlet and the first air outlet, the first flow control component is provided with a plurality of first flow control holes (3), and the apertures of at least part of the first flow control holes (3) are different; and the first flow control channels are used for correspondingly and hermetically communicating at least one first flow control hole (3) with one first air outlet, and any two adjacent first flow control channels are hermetically separated;
the converging device (7) is provided with a second inner cavity, at least one second air outlet and at least two second air inlets, wherein the second air outlet is communicated with the second inner cavity, and all the second air inlets are communicated with the air utilization equipment (4) through a fifth pipeline (9);
the second flow control assembly is provided with a second flow control component (8) with the periphery being hermetically arranged in a second inner cavity of the converging device and positioned between the second air inlet and the second air outlet, the second flow control component is provided with a plurality of second flow control holes (8), and at least part of the second flow control holes (8) have different apertures; and second flow control channels which are communicated with at least one second flow control hole (8) and one second air inlet in a corresponding sealing way are sealed and separated from any two adjacent second flow control channels.
2. The airflow rate control device according to claim 1, wherein the first flow control holes (3) are in one-to-one correspondence with the first air outlets.
3. The airflow rate control device according to claim 1 or 2, characterized in that the first flow control hole (3) and the corresponding first air outlet are connected in a sealing manner through a second pipeline, and the second pipeline is used as the first flow control channel.
4. An airflow rate control device according to claim 1 or 2, characterized in that the apertures of all the first flow control holes (3) are different.
5. An airflow rate control device according to claim 1 or 2, characterized in that the second flow control hole (8) is in sealing connection with the corresponding second air inlet through a fourth pipeline, and the fourth pipeline is used as the second flow control channel.
6. An airflow rate control device according to claim 1 or 2, characterized in that,
the filter device further comprises a filter component arranged on the first flow control channel and/or the second flow control channel, and at least one filter hole is formed in the filter component.
7. An airflow rate control device according to claim 1 or 2, characterized in that the first flow control member and/or the second flow control member are in the form of a plate.
8. An airflow rate control device according to claim 1 or 2 wherein the first and second flow control apertures are circular, square or profiled.
9. An ion mobility spectrometer comprising an airflow rate control device according to any one of claims 1 to 8, wherein a plurality of said first air outlets are in one-to-one communication with air inlet ports of said ion mobility spectrometer via third ducts (6).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910678189.2A CN112362719B (en) | 2019-07-25 | 2019-07-25 | Airflow flow control device and ion mobility spectrometer |
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| CN201910678189.2A CN112362719B (en) | 2019-07-25 | 2019-07-25 | Airflow flow control device and ion mobility spectrometer |
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| CN112362719B true CN112362719B (en) | 2023-08-25 |
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