CN220194517U

CN220194517U - Multi-component dynamic gas distribution device

Info

Publication number: CN220194517U
Application number: CN202321603346.1U
Authority: CN
Inventors: 张晶; 李哲; 焦松涛; 李舟; 张弛; 王会敏; 杨毕宣
Original assignee: Huayun Sounding Beijing Meteorological Technology Corp
Current assignee: Huayun Sounding Beijing Meteorological Technology Corp
Priority date: 2023-06-21
Filing date: 2023-06-21
Publication date: 2023-12-19
Anticipated expiration: 2033-06-21

Abstract

The application provides a multicomponent dynamic gas distribution device, including: a plurality of standard gas passages, a diluent gas passage and a mixed gas passage; a pressure reducing valve group and an electromagnetic valve group are arranged on the multi-channel standard gas channel, and the pressure reducing valve group is connected with the multi-channel source gas and the electromagnetic valve group; the diluting gas passage is provided with a pressure reducing valve and a first electromagnetic valve, and the pressure reducing valve is connected with a diluting gas source and the first electromagnetic valve; the multi-channel standard gas passage is connected with the diluent gas passage through a first mass flow controller and a second mass flow controller, the standard gas passage and the diluent gas passage are dynamically adjusted by combining the corresponding mass flow controllers through the multi-channel standard gas passage, the diluent gas passage, the pressure reducing valves, the electromagnetic valves and the electromagnetic valves, and the adjusted gas is mixed through a gas mixer on the mixed gas passage, and the gas proportioning output and uniform mixing are realized through the first gas mixer and the second gas mixer on the mixed gas passage.

Description

Multi-component dynamic gas distribution device

Technical Field

The application relates to the technical field of gas detection, in particular to a multi-component dynamic gas distribution device.

Background

The dynamic gas distribution is to introduce the raw material gas and the diluent gas with known concentration into a gas mixing chamber with smaller flow and a certain proportion, and continuously output the gas with larger flow and a certain concentration after the mixing chamber is uniform.

In the related art, the dynamic gas distribution method mainly comprises a serial dilution method, a negative pressure injection method, a permeation tube method, a gas diffusion method, a saturated steam method and the like, and the currently mainstream dynamic gas distribution method is a permeation tube method and a mass flow mixing method.

In the prior art, the uneven mixing of the multi-component gas proportioning output of the dynamic gas distribution technology has become an important problem.

Disclosure of Invention

In view of the foregoing, the present application provides a multi-component dynamic air distribution device to solve at least the foregoing technical problems.

The embodiment of the application provides a multicomponent dynamic gas distribution device, which comprises: a plurality of standard gas passages, a diluent gas passage and a mixed gas passage; the pressure reducing valve group and the electromagnetic valve group are arranged on the multi-channel standard gas channel, one end of the pressure reducing valve group is connected with multi-channel source gas, and the other end of the pressure reducing valve group is connected with the electromagnetic valve group; the dilution gas passage is provided with a pressure reducing valve and a first electromagnetic valve, one end of the pressure reducing valve is connected with a dilution gas source, and the other end of the pressure reducing valve is connected with the first electromagnetic valve; the multi-path standard gas passage is connected with the diluent gas passage through a first mass flow controller and the mixed gas passage through a second mass flow controller.

In an embodiment, a second electromagnetic valve is arranged between the multi-path standard gas passage and the diluent gas passage, one end of the second electromagnetic valve is respectively connected with the electromagnetic valve group and the first mass flow controller, and the other end of the second electromagnetic valve is respectively connected with the first electromagnetic valve and the second mass flow controller.

In an embodiment, the mixed gas passage is sequentially provided with a first gas mixer and a second gas mixer, wherein the first gas mixer is used for mixing gases with different pressures, and the second gas mixer is used for uniformly mixing the gases.

In an embodiment, a third electromagnetic valve is arranged between the first mass flow controller and the first gas mixer, and a fourth electromagnetic valve is arranged between the second mass flow controller and the first gas mixer.

In one embodiment, the first gas mixer comprises: the high-speed nozzle assembly is in threaded connection with the venturi tube through the connecting assembly.

In an embodiment, the high-speed nozzle assembly comprises a first flange and a high-speed nozzle, the venturi tube comprises a pipeline and a third flange, wherein the pipeline comprises an inlet section, a contraction section, a throat section and a diffusion section, and the second flange in the connecting assembly is used for setting one end of the high-speed nozzle at the inlet section.

In one embodiment, the second gas mixer comprises: the static mixer comprises a connecting flange, a static mixer pipe sleeve and a mixing unit; the connecting flanges are arranged at two ends of the static mixer pipe sleeve, and the mixing unit is arranged in the static mixer pipe sleeve.

In one embodiment, a plurality of said mixing units are mounted in sequence within said static mixer shroud at a predetermined angular variation.

In one embodiment, the multicomponent dynamic gas distribution device further comprises: the upper computer is in communication connection with the driver, the first mass flow controller and the second mass flow controller, and the driver controls the electromagnetic valve group, the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve and the fourth electromagnetic valve to operate.

In an embodiment, the mixing unit comprises: static corrugated plate mixing unit.

According to the multi-component dynamic gas distribution device, the first mass flow controller and the second mass flow controller are used for adjusting the gas flow of each path of single-path or multi-path standard gas, the gas flow ratio of any proportion is achieved, required gas is output to a mixed gas path, the standard gas path and the diluent gas path are dynamically adjusted by combining the first mass flow controller and the second mass flow controller through the multi-path standard gas path, the various pressure reducing valves of the diluent gas path, the electromagnetic valve, the pressure reducing valve bank and the electromagnetic valve bank, and in addition, the gas ratio output and uniform mixing can be further achieved through the first gas mixer and the second gas mixer in the mixed gas path.

It should be understood that what is described in this section is not intended to identify key or critical features of the embodiments of the application or to delineate the scope of the application, other features of which will be readily apparent from the description that follows.

Drawings

The present application will be described in more detail hereinafter based on embodiments and with reference to the accompanying drawings.

FIG. 1 is a schematic structural view of a multicomponent dynamic gas distribution device according to an embodiment of the present application;

FIG. 2 is a schematic diagram of a first gas mixer according to an embodiment of the present application;

FIG. 3 shows a schematic diagram of a second gas mixer according to an embodiment of the present application;

fig. 4 shows a schematic structural diagram of a mixing unit according to an embodiment of the present application;

fig. 5 is a schematic flow chart of issuing an upper computer program according to an embodiment of the present application.

Detailed Description

In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The multi-component dynamic gas distribution device provided by the embodiment of the utility model can be applied to the ratio output and mixing of multi-component gas and diluent gas so as to solve the problem of uneven ratio output and mixing of the multi-component gas in the existing dynamic gas distribution technology, wherein the multi-component dynamic gas distribution device is suitable for application scenes such as gas sensor calibration, gas detection analysis and the like.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a multi-component dynamic air distribution device according to an embodiment of the present application.

The multicomponent dynamic gas distribution device of the embodiment of the utility model comprises:

a plurality of standard gas passages, a diluent gas passage and a mixed gas passage; the pressure reducing valve group 301 and the electromagnetic valve group 401 are arranged on the multi-channel standard gas channel, one end of the pressure reducing valve group 301 is connected with the multi-channel source gas 1, and the other end of the pressure reducing valve group 301 is connected with the electromagnetic valve group 401; the diluting gas passage is provided with a reducing valve 302 and a first electromagnetic valve 402, one end of the reducing valve 302 is connected with a diluting gas source 2, and the other end of the reducing valve 302 is connected with the first electromagnetic valve 402; the multiple standard gas paths are connected to the mixed gas path through a first mass flow controller 7 and the diluent gas path through a second mass flow controller 8.

In this embodiment of the application, for the multiple gas sources 1 and the dilution gas source 2, the multiple gas sources 1 may add and subtract the number of gas paths according to the actual proportioning requirement, and correspondingly select different gas types and concentrations. Illustratively, the dilution gas source 2 may include AIR, N2, AR, or the like.

The pressure reducing valve set 301 is used for regulating sub pressure reducing valves of each path of source gas, wherein the pressure value of the output gas can be flexibly regulated according to the use requirement of a user, the gas mixing is facilitated under the condition that the pressure of each path of source gas is equal, the laminar flow phenomenon is not generated, the pressure reducing valve 302 is used for regulating and controlling a dilution gas source, the pressure reducing valve 302 acts as the same ratio as the pressure reducing valve set 301, and the optimal pressure regulating value is equal to the pressure regulating value of the multi-path source gas.

The electromagnetic valve group 401 can control one-way electromagnetic valves for on-off of each path of source gas, selective mixing of multiple paths of source gas is realized by controlling the on-off of each electromagnetic valve, so that gas proportioning components are richer and more flexible, the first electromagnetic valve 402 is an electromagnetic valve for controlling a dilution gas source, on-off of the dilution gas source is realized by controlling the on-off of the electromagnetic valve, and the controllability of gas mixing is improved.

The first mass flow controller 7 is a controller of a multipath standard gas passage, can select the number of input channels according to the proportioning requirement of a user, is provided with at least one air inlet and one air outlet, can be expanded into multiple-input single-output, can realize accurate control of source gas flow by using the mass flow controller, and realizes accurate proportioning of dynamic gas distribution. The second mass flow controller 8 is a controller of a dilution air source passage, the controller is arranged to be single in and out and single out, and the accurate control of the flow of the dilution air source is realized through the regulation and control of the controller, so that the guarantee is provided for the accuracy of the multi-component dynamic air distribution device.

In this embodiment, the device adapts to different scenes and user demands, and adjusts the multi-path source gas and the dilution gas source according to actual output flow demands by setting a plurality of mass flow controllers, so as to realize that the gas flow of each path is adjusted by the mass flow controllers to realize the gas flow ratio of any proportion, output standard gas to generate mixed gas, dilute single-path or multi-path gas according to the user demands, accurately control the source gas and dilution flow ratio, and prepare standard gas with different concentrations.

Cleaning of the multicomponent dynamic gas distribution device is contemplated.

In some embodiments, a second electromagnetic valve 403 is arranged between the multi-path standard gas path and the diluent gas path, one end of the second electromagnetic valve 403 is respectively connected with the electromagnetic valve group 401 and the first mass flow controller 7, and the other end of the second electromagnetic valve 403 is respectively connected with the first electromagnetic valve 402 and the second mass flow controller 8.

In this embodiment of the present application, the second solenoid valve 403 is a one-way solenoid valve for realizing cleaning of the multicomponent dynamic gas distribution device, where one gas inlet of the second solenoid valve 403 is connected to the first solenoid valve 402, the gas outlet is connected to the first mass flow controller 7 and the solenoid valve group 401, when in a gas distribution state, the second solenoid valve 403 is adjusted to be in a closed state, the multiple paths of source gas 1 and diluent gas 2 respectively pass through the first mass flow controller 7 and the second mass flow controller 8 to a mixed gas channel to realize a target gas ratio, when the gas channel is self-cleaned, the second solenoid valve 403 is adjusted to be in an open state, the source gas channel (e.g. the solenoid valve group 401) is closed, the diluent gas channel is opened, a part of diluent gas passes through the second mass flow controller 8 and other valve opening devices to be in the gas mixing channel, and another part of diluent gas passes through the first mass flow controller 7 and other valve opening devices to be in the gas mixing channel, thereby realizing a cleaning function of the gas distribution channel of the multicomponent dynamic gas distribution device.

Consider that to achieve uniform mixing of the proportioning gases.

In some embodiments, a first gas mixer 9 and a second gas mixer 10 are sequentially arranged on the mixed gas path, wherein the first gas mixer 9 is used for mixing gases with different pressures, and the second gas mixer 10 is used for uniformly mixing the gases.

In the embodiment of the application, a two-stage mixer is adopted for mixing, wherein the first gas mixer is applicable to mixing of gases with different pressures, the second gas mixer is used for realizing gas uniformity, and the two-stage mixing device is used for realizing uniform mixing of proportioning gases.

The method is considered to prevent the mixed gas in the multi-component dynamic gas distribution device from generating backflow influence, so that the channel is polluted.

In some embodiments, a third solenoid valve 404 is disposed between the first mass flow controller 7 and the first gas mixer 9, and a fourth solenoid valve 405 is disposed between the second mass flow controller 8 and the first gas mixer 9.

In this embodiment of the present application, the third electromagnetic valve 404 may be a unidirectional electromagnetic valve of the source gas path, the air inlet is connected to the first mass flow controller 7, the air outlet is connected to the first gas mixer 9, the mixed gas is prevented from generating backflow to affect the first mass flow controller 7 and pollute the source gas path, the fourth electromagnetic valve 405 is a unidirectional electromagnetic valve of the diluent gas path, the function is equivalent to that of the third electromagnetic valve 404, and the mixed gas backflow is prevented from polluting the second mass flow controller 8 and the diluent gas path.

In some aspects, a single solenoid valve may be replaced with a solenoid valve sleeve or other gas switching valve.

Consider the use requirements for adapting to different usage scenarios of the mixer.

Referring to fig. 2, fig. 2 is a schematic structural diagram of a first gas mixer according to an embodiment of the present application.

In some embodiments, as depicted in fig. 2, the first gas mixer 9 comprises: the high-speed nozzle assembly is in threaded connection with the venturi tube through the connecting assembly, the high-speed nozzle assembly comprises a first flange and a high-speed nozzle, the venturi tube comprises an inlet section, a contraction section, a pipeline and a third flange, the pipeline and the third flange are formed by the throat section and the diffusion section, and one end of the high-speed nozzle is arranged at the inlet section through the second flange in the connecting assembly.

In this embodiment of the present application, the first stage gas mixer may specifically include three parts, namely a high-speed nozzle part, a venturi tube part and an intermediate connection pipeline part, where the high-speed nozzle part includes an air inlet 2, a flange 1, and a high-speed nozzle, and the venturi tube part includes a complete venturi tube (inlet section, constriction section, throat, and diffusion section), a flange 3, and an air outlet, and the intermediate connection part includes the air inlet 1 and the flange 2.

It should be noted that, this blender can satisfy the user demand of different scenes, not only is applicable to two kinds of gas mixture of equal isobaric, also is applicable to two kinds of gas mixture of unequal isobaric, when the gas of air inlet 2 is through the in-process of high-speed nozzle sudden expansion, can produce certain negative pressure difference, makes the gas of air inlet 1 be inhaled because of the negative pressure, realizes the mixing of different pressure difference gas, and high-speed nozzle part and venturi part outer end face have and connect the external screw thread, and intermediate junction part both ends face have and connect the internal screw thread.

In some aspects, a conventional gas jet mixer may be used instead when there is no dilution gas and source gas pressure differential.

Consider that to further achieve a sufficiently uniform mixing of the gases.

Referring to fig. 3, fig. 3 is a schematic structural diagram of a second gas mixer according to an embodiment of the present disclosure.

In some embodiments, the second gas mixer 10 comprises: a connection flange 101, a static mixer shroud 102, a mixing unit (vertically mounted SV-type mixing unit 103 and horizontally mounted SV-type mixing unit); the connection flanges 101 are provided at both ends of the static mixer shroud 102, and the mixing unit is provided in the static mixer shroud 102.

In some aspects, a plurality of mixing units are mounted in sequence at a predetermined angular variation within static mixer shroud 102.

In this embodiment, the second-stage mixer includes three parts, which are a connection flange, a mixing pipe (static mixer pipe sleeve), and a mixing unit, where the connection flange part includes connection flanges at two ends, the mixing pipe is a pipeline for supporting the mixing elements to be fixed in a certain arrangement manner, and the mixing unit part includes a structure schematically shown in fig. 4, and each mixing unit is installed in a 90 ° arrangement according to the vertical installation SV type mixing unit 103 and the horizontal installation SV type mixing unit according to the sequence shown in fig. 3.

In some embodiments, the mixing unit comprises: static corrugated plate mixing unit.

As shown in FIG. 4, the static mixer is divided into baffle plates, vane type, maze, corrugated plate mixer and the like according to different static mixing elements, and the static mixer of the utility model adopts corrugated plate for gas-gas mixing and mixing static components, so that the mixed gas can flow in a Z shape in a three-dimensional space, and the gas is respectively dispersed to realize the purpose of uniform mixing.

In the embodiment, various gases such as isobaric unequal amount and isobaric unequal amount are mixed by a two-stage dynamic and static gas mixing device, gas mixing without amplification effect is realized by a corrugated plate static mixer, and uniform mixing of proportioning gases can be realized by combining two mixing devices.

Consider the more convenient control operation in order to achieve the device.

Fig. 5 is a schematic flow chart of the upper computer program issuing.

In some embodiments, the multicomponent dynamic gas distribution device further comprises: the upper computer 6 is in communication connection with the driver 5, the first mass flow controller 7 and the second mass flow controller 8, and the driver 5 controls the electromagnetic valve group 401, the first electromagnetic valve 402, the second electromagnetic valve 403, the third electromagnetic valve 404 and the fourth electromagnetic valve 405 to operate.

In the embodiment provided by the application, in order to realize the driver of each electromagnetic valve, the drivers of the electromagnetic valve driving are respectively connected with the upper computer and the electromagnetic assembly signal, the drivers of the electromagnetic valve driving are respectively connected with the upper computer and various electromagnetic valves, and the like, the upper computer receives the upper computer signal to realize the switching of various electromagnetic valves, and the upper computer can issue instructions according to the flow diagram issued by the upper computer program as shown in fig. 5, so that the control of the whole multicomponent dynamic air distribution device is realized, and the control is used for function selection (air distribution or cleaning), air source selection of multipath source air, standard and diluted air source types, output flow, conversion coefficient of source air, and the like.

In the embodiment of the application, the functions of the upper computer are added, the driver and the mass flow controller are controlled by the upper computer, the driver controls the switch of each path of electromagnetic valve, and real-time proportioning parameter adjustment and better man-machine interaction can be realized.

It should be understood that the disclosed technology may be implemented in other ways. The above-described embodiments of the apparatus are merely exemplary, and the division of the units, for example, may be a logic function division, and may be implemented in another manner, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interfaces, units or modules, or may be in electrical or other forms.

In addition, each functional unit in the embodiments of the present utility model may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, one of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not drive the essence of the corresponding technical solutions to depart from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A multicomponent dynamic gas distribution device comprising: a plurality of standard gas passages, a diluent gas passage and a mixed gas passage;

the pressure reducing valve group and the electromagnetic valve group are arranged on the multi-channel standard gas channel, one end of the pressure reducing valve group is connected with multi-channel source gas, and the other end of the pressure reducing valve group is connected with the electromagnetic valve group;

the dilution gas passage is provided with a pressure reducing valve and a first electromagnetic valve, one end of the pressure reducing valve is connected with a dilution gas source, and the other end of the pressure reducing valve is connected with the first electromagnetic valve;

the multi-path standard gas passage is connected with the diluent gas passage through a first mass flow controller and the mixed gas passage through a second mass flow controller.

2. The multi-component dynamic gas distribution device according to claim 1, wherein a second electromagnetic valve is arranged between the multi-channel standard gas channel and the diluent gas channel, one end of the second electromagnetic valve is respectively connected with the electromagnetic valve group and the first mass flow controller, and the other end of the second electromagnetic valve is respectively connected with the first electromagnetic valve and the second mass flow controller.

3. The multi-component dynamic gas distribution device according to claim 2, wherein a first gas mixer and a second gas mixer are sequentially arranged on the mixed gas passage, the first gas mixer is used for mixing gases with different pressures, and the second gas mixer is used for uniformly mixing the gases.

4. A multi-component dynamic gas distribution device according to claim 3, wherein a third solenoid valve is arranged between the first mass flow controller and the first gas mixer, and a fourth solenoid valve is arranged between the second mass flow controller and the first gas mixer.

5. A multi-component dynamic gas distribution device according to claim 3, wherein the first gas mixer comprises: the high-speed nozzle assembly is in threaded connection with the venturi tube through the connecting assembly.

6. The multiple component dynamic gas distribution device according to claim 5, wherein the high-speed nozzle assembly comprises a first flange and a high-speed nozzle, the venturi tube comprises a pipe line comprising an inlet section, a constriction section, a throat section and a diffusion section, and a third flange, and the second flange in the connection assembly positions one end of the high-speed nozzle at the inlet section.

7. A multi-component dynamic gas distribution device according to claim 3, wherein the second gas mixer comprises: the static mixer comprises a connecting flange, a static mixer pipe sleeve and a mixing unit; the connecting flanges are arranged at two ends of the static mixer pipe sleeve, and the mixing unit is arranged in the static mixer pipe sleeve.

8. The multiple component dynamic gas distribution device according to claim 7, wherein a plurality of said mixing units are mounted in sequence within said static mixer shroud at a predetermined angular variation.

9. The multiple component dynamic gas distribution device of claim 4, further comprising: the upper computer is in communication connection with the driver, the first mass flow controller and the second mass flow controller, and the driver controls the electromagnetic valve group, the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve and the fourth electromagnetic valve to operate.

10. The multiple component dynamic gas distribution device of claim 8, wherein the mixing unit comprises: static corrugated plate mixing unit.