CN112362719A - Airflow flow control device and ion mobility spectrometer - Google Patents
Airflow flow control device and ion mobility spectrometer Download PDFInfo
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- CN112362719A CN112362719A CN201910678189.2A CN201910678189A CN112362719A CN 112362719 A CN112362719 A CN 112362719A CN 201910678189 A CN201910678189 A CN 201910678189A CN 112362719 A CN112362719 A CN 112362719A
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- flow control
- air
- flow
- airflow
- air inlet
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
Abstract
The invention relates to an airflow control device and an ion mobility spectrometer, wherein the airflow 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 which are communicated with the first inner cavity, and one path of airflow sent out by the air supply device is divided into multiple paths of airflow through the arrangement of the flow dividing device and is used for air supply of different air-using equipment or different air inlet ports of the air-using equipment; the first flow control assembly is connected in the first inner cavity in a sealing mode and located 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 first flow control holes are different in aperture, and due to the fact that the corresponding flow of different flow control holes under specific pressure is different, flow regulation control of multiple paths of air flows can be achieved through the arrangement of the first flow control holes; compared with the existing mass flow controller, needle valve, multi-way valve and the like, the mass flow controller has the advantages of simple structure, accurate flow regulation and convenient regulation operation.
Description
Technical Field
The invention relates to the technical field of ion mobility spectrometry, in particular to an airflow control device and an ion mobility spectrometer.
Background
An ion mobility spectrometer is an instrument which converts molecules to be measured into charged ions, the charged ions move under the action of a migration electric field, and simultaneously collide continuously in a gas environment, and finally, different ions are distinguished by analyzing the moving speed of the charged ions. Wherein the gas environment can be pure gas such as nitrogen, argon and the like, and can also be air; generally, the product is required to be relatively pure and stable.
In the instrument, the gas serves not only to provide a stable collision gas, but also to bring the sample into the ion source region for ionization of the sample to be measured, and sometimes to bypass the gas for other purposes. However, in general, the number of air pumps or air bottles for providing air movement is limited, and it is impossible to provide flow for each path of air by using one pump, so that a flow dividing structure is required to divide one path into multiple paths, and a flow controller or the like is adopted to achieve the purpose of controlling the air flow of each branch.
Most of flow controllers applied in the existing ion mobility spectrometers adopt mass flow controllers to realize accurate control of the flow of each branch gas path, and although the flow controllers can realize accurate control of gas flow, the mass flow controllers have the defects of high manufacturing cost, large volume and the like; part of the devices also adopt needle valves for flow control, but the needle valves have the defect of difficult adjustment when used for flow control, and accurate control cannot be realized; in addition, a part of the system directly adopts three-way or multi-way, and the defect of large airflow fluctuation exists when the three-way or multi-way is adopted for flow control, and accurate control cannot be realized; the flow control structures have the advantages that the flow can not be accurately controlled, meanwhile, the structure is simple, and the adjustment is convenient.
Disclosure of Invention
The technical problem underlying the present invention is therefore to overcome the technical problems of the prior art.
An air flow control device of the present invention includes:
an air supply device;
the flow dividing device is provided with a first inner cavity, and at least one first air inlet and at least two first air outlets which 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 part, the periphery of the first flow control part is hermetically arranged in the 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 part is provided with a plurality of first flow control holes, and at least part of the first flow control holes are different in aperture; and the first flow control channel is 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 control device, the first flow control holes correspond to the first air outlets one to one.
Preferably, in the airflow control device, the first flow control holes and the corresponding first air outlets are hermetically connected through second pipelines, and the second pipelines serve as the first flow control channels.
Preferably, the airflow control device has a different aperture for all the first control holes.
Preferably, the airflow control device further comprises a confluence device, wherein the confluence device is provided with a second inner cavity, and at least one second air outlet and at least two second air inlets which are communicated with the second inner cavity, and all the second air inlets are communicated with an air using device through a third pipeline;
the second flow control assembly is provided with a second flow control part, the periphery of the second flow control part is hermetically arranged in a second inner cavity of the confluence device and is positioned between the second air inlet and the second air outlet, the second flow control part is provided with a plurality of second flow control holes, and at least part of the second flow control holes are different in aperture; and the second flow control channel is 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 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 serves as the second flow control channel.
Preferably, the airflow control device further comprises a filter element disposed on the first flow control channel and/or the second flow control channel, and the filter element is provided with at least one filter hole.
Preferably, the first flow control part and/or the second flow control part are/is a plate.
Preferably, the first flow control hole and the second flow control hole are circular 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 above airflow flow control devices, wherein a plurality of the first air outlets are in one-to-one correspondence with air inlet ports of the ion mobility spectrometer through third pipelines.
The technical scheme of the invention has the following advantages:
1. the invention provides an airflow 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 which are communicated with the first inner cavity, and one path of airflow sent out by the air supply device is divided into multiple paths of airflow through the arrangement of the flow dividing device, so that the multiple paths of airflow can be used for air intake of different air appliances or different air inlet ports of the air appliances; the first flow control assembly is connected in the first inner cavity in a sealing mode and located 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 first flow control holes are different in aperture, and due to the fact that the corresponding flow of different flow control holes under specific pressure is different, flow regulation control of multiple paths of air flows can be achieved through the arrangement of the first flow control holes; compared with the existing flow control structures such as a mass flow controller, a needle valve and a multi-way valve, the flow control structure is simple in structure, accurate in flow regulation and convenient to regulate and operate.
2. The invention provides an airflow flow control device, which further comprises a confluence device, wherein the confluence 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-using equipment or different air outlet ports of the air-using equipment are converged by the confluence device and then conveyed to the air supply device again for recycling.
3. The ion mobility spectrometer provided by the invention is hermetically communicated with the airflow control device through a pipeline, divides one path of airflow in the air supply device into multiple paths of airflows for air intake of different air intake ports of air equipment through the flow dividing device, and realizes accurate control of the flow of each path of airflow through the arrangement of the first flow control assembly and the first flow control holes with different apertures so as to realize airflow requirements of different air intake ports of the air equipment with different flows; the airflow 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 used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of an airflow control device according to the present invention.
Description of reference numerals:
1-an air supply device;
2-a flow splitting device;
3-a first flow control orifice;
4-gas using equipment;
5-a first conduit;
6-a third pipeline;
7-a confluence device;
8-a second flow control orifice;
9-a fifth pipeline;
10-a sixth conduit;
11-filter element.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular 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 otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
An airflow control device of the present embodiment, as shown in fig. 1, includes an air supply device 1, a flow dividing device 2, a first flow control assembly 3, a converging device 7, a second flow control device 8, and a filter element 11, where 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 hermetically communicated with the air supply device 1 through a first pipeline 5; the periphery of the first flow control assembly is hermetically arranged in a first inner cavity of the flow dividing device 2, the first flow control assembly comprises a first flow control part positioned between a first air inlet and a first air outlet, five first flow control holes 3 are formed in the first flow control part, the aperture of each of the five first flow control holes 3 is different and is between 0.01 mm and 3mm, and the aperture of each of the five first flow control holes 3 can be selected from 0.1mm, 0.2mm, 0.3mm, 0.4mm and 0.5 mm; the number of the first air outlets is not limited to five, but may also be two, three, four, six, etc., and correspondingly, the number of the first flow control holes 3 is not limited to five, but may also be two, three, four, five, etc.; optionally, the apertures of the first flow control holes 3 are not limited to be all different, and may be partially the same and 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 in sealed communication with the five first air outlets through first flow control channels, namely one flow control hole is communicated with the first air outlet through one first flow control channel, two adjacent first flow control channel brackets are separated, and the five first air outlets are in one-to-one correspondence sealed communication with five air inlet ports of the air using equipment 4 through five third pipelines 6; optionally, 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 multiple first air outlets or multiple first flow control holes 3 correspond to one first air outlet; optionally, the first flow control channel is a second pipeline, and the first flow control hole 3 is connected with the corresponding first air outlet in a sealing manner through the second pipeline; optionally, the gas-using apparatus 4 is an ion mobility spectrometer or a mass spectrometer.
The confluence device 7 may have a structure opposite to that of the diversion device 2, and includes a second inner cavity (not shown), and five second air inlets (not shown) and one first air outlet (not shown) which are communicated with the second inner cavity, wherein the five second air inlets are respectively communicated with five air outlet ports of the gas-using equipment 4 in a sealing manner through five fifth pipelines 9; the second flow control assembly is the same in structure as the first flow control assembly and is provided with a second flow control part, the periphery of the second flow control part is hermetically arranged in the second inner cavity and positioned between the second air inlet and the second air outlet, five second flow control holes 8 are formed in 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 hermetically communicated with the five second air inlets through five second flow control channels (not shown), and two adjacent second flow control channels are hermetically separated; 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; optionally, the number of the second inlet ports is not limited to five, but may also be other numbers, such as one, two, three, four, six, etc., and correspondingly, the number of the second flow control holes 8 is not limited to five, and may be one, two, three, four, six, etc.; optionally, the apertures of the second flow control holes 8 are not limited to be different, and may be partially the same and partially different; the second inlet and the second flow control hole 8 may not correspond to each other, and one second inlet may correspond to a plurality of second flow control holes 8 or one second flow control hole 8 may correspond to a plurality of second inlets; alternatively, the main purpose of the confluence device 7 is to join the airflows from the plurality of air outlet ports of the gas-using equipment 4 and then input the merged airflows into the air supply device 1 for recycling, so that the confluence device 7 does not need to be provided with a second flow control assembly.
The first flow control part and the second flow control part are in a plate shape, and the first flow control hole 3 and the second flow control hole 8 can be circular holes, square holes or special-shaped holes with other shapes, and are not limited specifically; optionally, the first flow control component and the second flow control component may be made of ceramic, stainless steel, plastic, and the like, and are not particularly limited, and those skilled in the art may select the first flow control component and the second flow control component according to actual 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, and each first flow control component is provided with one first flow control hole 3, or only one first flow control component is formed and is provided with a plurality of first flow control holes 3 at intervals; the detachable structure can be inserted into the first inner cavity of the flow dividing device 2, or the structure integrated with the flow dividing device 2 can be adopted; similarly, the second flow control assembly may also be composed of a plurality of second flow control components, each second flow control component is arranged corresponding to one second air outlet, and each first flow control component is provided with one second flow control hole 8, or only one second flow control component is formed and is provided with a plurality of second flow control holes 8 at intervals; the removable structure may be inserted into the second inner cavity of the bus bar device 7, or the removable structure may be integrally formed with the bus bar device 7. For example, the first flow control member and the second flow control member are each a plate-shaped flow control plate.
The first duct 5 is provided with a filter element 11 for filtering the air flow output from the air supply device 1 to ensure the purity of the air used by the air-using equipment 4.
Optionally, a filtering component (not shown) is arranged in the first flow control channel and/or the second flow control channel, the filtering component is provided with filtering holes, and optionally, the filtering component is a filter screen; also can be a filter, is equipped with the filter screen corresponding first gas outlet on the filter. That is, the filter member may be provided only in the first flow control passage, may be provided only in the second flow control passage, or 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 ranges of the first flow control hole 3 and the second flow control hole 8 are 0.1mm-0.3mm, the first flow control component and the second flow control component are made of steel sheets with the thickness of 0.1mm, and the relationship between the pressure and the flow is as follows:
because the flow rates corresponding to the flow control holes with different apertures are different under specific pressure, the flow control holes with different apertures formed in the flow control component can accurately realize the flow rate of the air flow in each branch, and the flow control component is simple in structure and convenient to adjust the flow rate.
Example 2
An ion mobility spectrometer of this embodiment includes the airflow control device in embodiment 1, where five first air outlets of the flow dividing device are in one-to-one corresponding sealed communication with five air inlet ports of the ion mobility spectrometer through five third pipelines 6, respectively, and five air outlet ports of the ion mobility spectrometer are in one-to-one corresponding sealed communication with five second air inlets of the flow converging device 7 through five fifth pipelines 9, respectively;
the air inlet flow of the five air inlet ports is different, the five first air outlets are divided by the flow dividing 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 number of the intake ports may not be limited to five, but may be other numbers, such as one, two, etc.; similarly, the number of the air outlet ports is not limited to five, and may be other numbers, such as one, two, etc.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. An airflow flow control device, comprising:
an air supply device (1);
the flow dividing device (2) is provided with a first inner cavity, and at least one first air inlet and at least two first air outlets which 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 part, the periphery of the first flow control part is hermetically arranged in the 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 part is provided with a plurality of first flow control holes (3), and the hole diameters of at least part of the first flow control holes (3) are different; and the first flow control channel is 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.
2. A gas flow control device according to claim 1, characterised in that the first flow control apertures (3) are in one-to-one correspondence with the first outlet ports.
3. The gas flow control device according to claim 1 or 2, characterized in that the first flow control hole (3) is connected with the corresponding first gas outlet in a sealing way through a second pipeline, and the second pipeline is used as the first flow control channel.
4. A gas flow control device according to any of claims 1-3, characterized in that the aperture of all the first flow control apertures (3) is different.
5. A gas flow control device according to any of claims 1-4, characterized by a flow converging device (7) having a second inner chamber and at least one second outlet port and at least two second inlet ports communicating with the second inner chamber, all of the second inlet ports communicating with a gas consuming apparatus (4) through a fifth conduit (9);
the second flow control assembly is provided with a second flow control part (8) which is arranged in a second inner cavity of the confluence device in a sealing mode at the periphery and is positioned between the second air inlet and the second air outlet, the second flow control part is provided with a plurality of second flow control holes (8), and the hole diameters of at least part of the second flow control holes (8) are different; and a second flow control channel which enables at least one second flow control hole (8) to be correspondingly and hermetically communicated with one second air inlet, wherein any two adjacent second flow control channels are hermetically separated.
6. The airflow control device according to claim 5, characterized in that the second flow control hole (8) 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.
7. A flow control device according to claim 5,
the filter element is 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 element.
8. A gas flow control arrangement according to any of claims 1-5, characterised in that the first flow control means (3) and/or the second flow control means (8) are plate-shaped.
9. An airflow control device according to claim 6 wherein the first and second flow control apertures are circular, square or profiled.
10. An ion mobility spectrometer comprising an airflow control device according to any one of claims 1 to 8, wherein a plurality of the first air outlets communicate with the air inlet port of the ion mobility spectrometer in a one-to-one correspondence via a third conduit (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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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112362719B (en) * | 2019-07-25 | 2023-08-25 | 苏州微木智能系统有限公司 | Airflow flow control device and ion mobility spectrometer |
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| CN112362719B (en) * | 2019-07-25 | 2023-08-25 | 苏州微木智能系统有限公司 | Airflow flow control device and ion mobility spectrometer |
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