CN218599470U - Gas-liquid mixing proportioning device - Google Patents

Abstract

The utility model discloses a gas-liquid mixing proportioning device, which comprises a first gas circuit, a second gas circuit, a heating chamber and a mixing chamber, wherein the inlet end of the first gas circuit is communicated with a liquid source, and the outlet end of the first gas circuit is communicated with the heating chamber; the inlet end of the second gas circuit is communicated with a gas source, the outlet end of the second gas circuit is communicated with the heating chamber, the gas outlet end of the heating chamber is communicated with the gas inlet end of the mixing chamber, and the gas outlet end of the mixing chamber is connected with a gas outlet pipeline; a first valve and a metering pump are arranged on the first air path; and the second gas circuit is sequentially provided with a second valve, a first switch valve and a first gas mass flow controller. The utility model discloses a first gas mass flow controller accurate control gas flow adopts the accurate control liquid flow of high accuracy measuring pump and then guarantees the accuracy of feed liquor volume and air input simultaneously, guarantees that the gas mixture concentration satisfies the user demand.

Description

Gas-liquid mixing proportioning device

Technical Field

The utility model relates to a gas-liquid proportioning device technical field, in particular to gas-liquid mixture proportioning device.

Background

The material test platform and other systems need to simulate the atmosphere environment under the actual working condition during working, and the experimental atmosphere is then provided through the gas-liquid proportioning device, and the gas-liquid proportioning common process is: the liquid and the gas are introduced into the heating chamber through two gas paths, the liquid is heated and vaporized, and the vaporized gas is taken out to the mixer when the gas enters, so that the gas and the liquid are mixed. However, in the process, the liquid inlet amount of the liquid is difficult to accurately control, if the liquid inlet amount is too large, the concentration of the mixed gas is too high, and if the liquid inlet amount is not enough, the concentration of the mixed gas is too low; and when gas distribution (gas-liquid mixing ratio) is finished, residual liquid in a pipeline introduced into a liquid gas path is difficult to remove, and the residual liquid in the pipeline is remained in the pipeline for a long time, so that the pipeline corrosion is caused, and the next gas distribution precision is also influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's is not enough, provides a gas-liquid mixture ratio device, through the accurate control gas flow of first gas mass flow controller, adopts high accuracy metering pump accurate control liquid flow and then guarantees the accuracy of feed liquor volume and air input simultaneously, guarantees that gas mixture concentration satisfies the user demand.

The purpose of the utility model is realized through the following technical scheme:

a gas-liquid mixing proportioning device comprises a first gas path, a second gas path, a heating chamber and a mixing chamber, wherein the inlet end of the first gas path is communicated with a liquid source, and the outlet end of the first gas path is communicated with the heating chamber;

the inlet end of the second gas circuit is communicated with a gas source, the outlet end of the second gas circuit is communicated with the heating chamber, the gas outlet end of the heating chamber is communicated with the gas inlet end of the mixing chamber, and the gas outlet end of the mixing chamber is connected with a gas outlet pipeline;

the first gas path is provided with a first valve and a metering pump for accurately controlling the liquid inlet amount;

and the second gas circuit is sequentially provided with a second valve, a first switch valve and a first gas mass flow controller for accurately controlling the gas inflow. The utility model discloses a first gas mass flow controller accurate control gas flow adopts the accurate control liquid flow of high accuracy measurement pump and then guarantees the accuracy of feed liquor volume and air input simultaneously, guarantees that the gas mixture concentration satisfies the user demand

Furthermore, a purging branch is arranged between the first gas path and the second gas path, and a second switch valve and a first one-way valve are sequentially arranged on the purging branch.

Furthermore, one end of the purging branch is arranged close to the liquid source and located between the first valve and the metering pump, and the other end of the purging branch is arranged close to the gas source and located between the second valve and the first switch valve.

Furthermore, a second-stage dilution air path is arranged between the second air path and the air outlet pipeline, and a third switch valve, a second air mass flow controller and a second one-way valve are sequentially arranged on the second-stage dilution air path.

Furthermore, a fourth switch valve, a third valve and a fire valve are sequentially arranged on the air outlet pipeline.

Furthermore, pressure sensors are respectively arranged on the first air path and the second air path.

Further, a safety valve is further arranged on the first air path and located between the air source and the pressure sensor.

Further, a third one-way valve is arranged on the first air path and is arranged between the metering pump and the heating chamber;

and a fourth check valve and a fifth check valve are arranged on the second gas path, the fourth check valve is arranged between the second valve and the purging branch, and the fifth check valve is arranged between the first gas mass flow controller and the heating chamber.

Further, an insulating layer is arranged outside the air outlet pipeline

The beneficial effects of the utility model are that:

1) The utility model discloses a first gas mass flow controller accurate control gas flow adopts the accurate control liquid flow of high accuracy measuring pump and then guarantees the accuracy of feed liquor volume and air input simultaneously, guarantees that the gas mixture concentration satisfies the user demand.

2) Through setting up the branch road that sweeps, introduce the gas of second gas circuit into first gas circuit, can sweep remaining liquid in the second gas circuit when the distribution is finished, and then avoid remaining liquid in the second gas circuit for a long time.

3) Through setting up second grade dilution gas circuit and can carry out the two-stage dilution to liquid, increase the dilution width of gas mixture.

Drawings

Fig. 1 is a schematic view of the overall structure of a gas-liquid mixing and proportioning device in the embodiment of the present invention;

in the figure, 1, a first air path; 2. a second gas path; 3. a heating chamber; 4. a mixing chamber; 5. a source of liquid; 6. a gas source; 7. an air outlet pipe; 8. a first valve; 9. a metering pump; 10. a second valve; 11. a first on-off valve; 12. a first gas mass flow controller; 13. a purging branch; 14. a second on-off valve; 15. a first check valve; 16. a second-stage dilution gas circuit; 17. a third on/off valve; 18. a second gas mass flow controller; 19. a second check valve; 20. a fourth switching valve; 21. a third valve; 22. a fire-stopping valve; 23. a pressure sensor; 24. a safety valve; 25. a third check valve; 26. a fourth check valve; 27. and a fifth check valve.

Detailed Description

The technical solutions of the present invention will be described clearly and completely below with reference to embodiments, and it should be understood that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1, the utility model provides a technical scheme:

the embodiment is as follows:

as shown in fig. 1, a gas-liquid mixture proportioning device includes a first gas path 1, a second gas path 2, a heating chamber 3 and a mixing chamber 4, an inlet end of the first gas path 1 is communicated with a liquid source 5, and an outlet end of the first gas path 1 is communicated with the heating chamber 3;

the inlet end of the second gas circuit 2 is communicated with a gas source 6, the outlet end of the second gas circuit 2 is communicated with the heating chamber 3, the gas outlet end of the heating chamber 3 is communicated with the gas inlet end of the mixing chamber 4, and the gas outlet end of the mixing chamber 4 is connected with a gas outlet pipeline 7;

the first gas path 1 is provided with a first valve 8 and a metering pump 9 for accurately controlling the liquid inlet amount;

and the second gas circuit 2 is sequentially provided with a second valve 10, a first switch valve 11 and a first gas mass flow controller 12 for accurately controlling the gas inflow.

Among them, (1) a gas Mass flow controller (flow meter) is a device for precisely measuring and controlling a Mass flow of a gas, which is abbreviated as MFC (MFM). (2) The metering pump 9 is a high-precision constant flow pump, and can control the set step length: flow rate range of 0.001 mL/min: (0-9.999) mL/min below liquid inlet, can realize stepless regulation; both of the foregoing are prior art and will not be described herein.

Wherein, the liquid source 5 is liquid carbon tetrachloride, the gas source 6 is hydrogen, and the heating chamber 3 is a vaporizer.

The first switch valve 11 may be, but is not limited to, a normally open switch valve.

The working principle is as follows: the first valve 8 and the second valve 10 are opened, the gas source 6 and the liquid source 5 supply gas and liquid respectively, the liquid and the gas enter the heating chamber 3 at the same time, and the gas is carried out to the mixing chamber 4 when the liquid is vaporized, so that gas-liquid mixing is realized.

When the gas enters the heating chamber 3, the gas flow is accurately controlled by the first gas mass flow controller 12, and when the liquid enters the heating chamber 3, the liquid flow is accurately controlled by the high-precision metering pump 9. The concentration of the mixed gas is controlled by the liquid inlet amount and the gas inlet amount.

The utility model discloses a 12 accurate control gas flow of first gas mass flow controller adopts 9 accurate control liquid flow of high accuracy measuring pump and then guarantees the accuracy of feed liquor volume and air input simultaneously, guarantees that the gas mixture concentration satisfies the user demand.

Further, as shown in fig. 1, a purging branch 13 is disposed between the first gas circuit 1 and the second gas circuit 2, and a second switch valve 14 and a first check valve 15 are sequentially disposed on the purging branch 13.

Wherein the second switching valve 14 may be, but is not limited to, a normally closed switching valve.

When the gas distribution is finished or in the final stage of the gas distribution, the liquid source 5 is closed, the second switch valve 14 is opened, the gas enters the first gas circuit 1 through the purging branch 13, and the liquid remaining in the first gas circuit 1 is blown into the heating chamber 3, so that the liquid remaining in the first gas circuit 1 can be avoided.

Through setting up and sweeping branch 13, introduce the gas of second gas circuit 2 into first gas circuit 1, remaining liquid can be swept in the second gas circuit 2 when the distribution is finished, and then avoid remaining liquid in the second gas circuit 2 for a long time.

Further, as shown in fig. 1, one end of the purging branch 13 is disposed near the liquid source 5 and between the first valve 8 and the metering pump 9, and the other end of the purging branch 13 is disposed near the gas source 6 and between the second valve 10 and the first switch valve 11.

So configured, the remaining of liquid in the first gas circuit 1 can be minimized.

Further, as shown in fig. 1, a second-stage dilution gas path 16 is arranged between the second gas path 2 and the gas outlet pipe 7, and a third on-off valve 17, a second gas mass flow controller 18 and a second one-way valve 19 are sequentially arranged on the second-stage dilution gas path 16.

The second-stage dilution gas circuit 16 is used for further diluting the gas mixture, and when the gas is mixed with the mixer through the second-stage dilution gas circuit 16, the gas concentration is further reduced, so that the dilution width of the gas mixture can be increased (namely, the gas mixture concentration range can be increased to 30% -80% if the gas mixture range with the gas distribution range of 50% -80%).

The two-stage dilution can be carried out on the liquid by arranging the second-stage dilution air path 16, and the dilution width of the mixed gas is increased.

Further, as shown in fig. 1, a fourth switch valve 20, a third valve 21 and a fire valve 22 are sequentially disposed on the outlet pipe 7.

Wherein the fourth switching valve 20 may be, but is not limited to, a normally open switching valve.

Further, as shown in fig. 1, pressure sensors 23 are respectively disposed on the first air path 1 and the second air path 2. A pressure sensor 23 is provided for detecting the pressure of the first and second gas lines 1 and 2.

Further, as shown in fig. 1, a safety valve 24 is further disposed on the first gas path 1, and the safety valve 24 is located between the gas source 6 and the pressure sensor 23.

Further, as shown in fig. 1, a third check valve 25 is arranged on the first gas path 1, and the third check valve 25 is arranged between the metering pump 9 and the heating chamber 3;

a fourth one-way valve 26 and a fifth one-way valve 27 are arranged on the second gas path 2, the fourth one-way valve 26 is arranged between the second valve 10 and the purging branch 13, and the fifth one-way valve 27 is arranged between the first gas mass flow controller 12 and the heating chamber 3.

A fourth check valve 26 is provided to prevent gas from flowing back through the purge branch 13, the fourth check valve 26 is provided to prevent gas from flowing back towards the gas source 6, and a fifth check valve 27 is provided to prevent gas from flowing back towards the purge branch 13.

Further, as shown in fig. 1, an insulating layer is disposed outside the air outlet pipe 7. The arranged heat preservation layer can prevent liquid from condensing, and the heat preservation layer can be, but is not limited to, heat preservation and insulation cotton, and can also be other heat preservation materials, which are not described in detail here.

The foregoing is illustrative of the preferred embodiments of the present invention, and it is to be understood that the invention is not limited to the precise forms disclosed herein, and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the invention as defined by the appended claims. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.

Claims (9)

1. The utility model provides a gas-liquid mixture proportioning device which characterized in that: the device comprises a first gas path, a second gas path, a heating chamber and a mixing chamber, wherein the inlet end of the first gas path is communicated with a liquid source, and the outlet end of the first gas path is communicated with the heating chamber;

the inlet end of the second gas path is communicated with a gas source, the outlet end of the second gas path is communicated with the heating chamber, the gas outlet end of the heating chamber is communicated with the gas inlet end of the mixing chamber, and the gas outlet end of the mixing chamber is connected with a gas outlet pipeline;

the first gas path is provided with a first valve and a metering pump for accurately controlling the liquid inlet amount;

and the second gas path is sequentially provided with a second valve, a first switch valve and a first gas mass flow controller for accurately controlling the gas inflow.

2. The gas-liquid mixture proportioning device of claim 1, characterized in that: a purging branch is arranged between the first air path and the second air path, and a second switch valve and a first one-way valve are sequentially arranged on the purging branch.

3. The gas-liquid mixture proportioning device of claim 2, characterized in that: one end of the purging branch is close to the liquid source and located between the first valve and the metering pump, and the other end of the purging branch is close to the gas source and located between the second valve and the first switch valve.

4. The gas-liquid mixture proportioning device of claim 3, wherein: and a second-stage dilution air path is arranged between the second air path and the air outlet pipeline, and a third switch valve, a second air mass flow controller and a second one-way valve are sequentially arranged on the second-stage dilution air path.

5. The gas-liquid mixture proportioning device of claim 1, characterized in that: and a fourth switch valve, a third valve and a fire stopping valve are sequentially arranged on the air outlet pipeline.

6. The gas-liquid mixture proportioning device of claim 1, characterized in that: and the first air path and the second air path are respectively provided with a pressure sensor.

7. The gas-liquid mixture proportioning device of claim 6, wherein: and the first gas path is also provided with a safety valve, and the safety valve is positioned between the gas source and the pressure sensor.

8. The gas-liquid mixture proportioning device of claim 4, characterized in that: a third one-way valve is arranged on the first air path and is arranged between the metering pump and the heating chamber;

and a fourth check valve and a fifth check valve are arranged on the second gas path, the fourth check valve is arranged between the second valve and the purging branch, and the fifth check valve is arranged between the first gas mass flow controller and the heating chamber.

9. The gas-liquid mixture proportioning device of claim 8, wherein: and a heat insulation layer is arranged outside the air outlet pipeline.

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