Small gas flow quick conversion system

Abstract

The utility model relates to the technical field of portable total hydrocarbon detection equipment sampling, and particularly discloses a small gas flow quick conversion system. The small gas flow quick conversion system comprises a gas storage container, a pressure regulating gas circuit, a first gas circuit and a second gas circuit, wherein the first gas circuit and the second gas circuit are connected in parallel; one parallel end of the first gas path and the second gas path is communicated with the outlet of the gas storage container through the pressure regulating gas path, and the other parallel end is communicated with the use end; a normally-closed first ultra-miniature electromagnetic valve and an air resistor are arranged in the first air path; and a normally-closed second ultra-miniature electromagnetic valve is arranged in the second gas path. The small-sized gas flow quick conversion system is insensitive to the change of environment temperature and pressure, is high in response speed, can perform quick gas flow conversion, and can realize microfluid and high-speed precise control.

Description

Technical Field

[0001] The utility model relates to the technical field of sampling of portable total hydrocarbon detection equipment, in particular to a small-sized gas flow rapid conversion system. Background Art

[0002] In the prior art, in order to achieve gas flow conversion with the same gas source, a pressure regulating valve is usually installed on the gas input or gas output pipeline to adjust the gas flow.

[0003] The patent with publication number CN112906875A discloses a gas flow conversion system, which uses piezoelectric ceramics to drive the main valve core of the flow valve to achieve precise control of the displacement between the valve core and the valve body, thereby achieving control of the opening amount of the flow valve, achieving the purpose of microfluidics and high-speed precision control. However, the system is relatively complex, has high manufacturing costs, cannot be miniaturized, is sensitive to changes in ambient temperature and pressure, and has a slow response speed, and cannot perform rapid gas flow conversion. Summary of the invention

[0004] The utility model aims to provide a small-sized gas flow rapid conversion system, which is insensitive to changes in ambient temperature and pressure, has a fast response speed, and can perform rapid gas flow conversion.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A small-sized gas flow rapid conversion system comprises a gas storage container, a pressure regulating gas circuit, and a first gas circuit and a second gas circuit connected in parallel;

[0007] One parallel end of the first gas path and the second gas path is connected to the outlet of the gas storage container through the pressure regulating gas path, and the other parallel end is connected to the use end;

[0008] The first gas circuit is provided with a normally closed first ultra-micro solenoid valve and an air resistor; the second gas circuit is provided with a normally closed second ultra-micro solenoid valve.

[0009] Furthermore, a diaphragm pressure regulating valve is provided in the pressure regulating gas circuit.

[0010] Furthermore, a pressure sensor is also provided in the pressure regulating gas circuit, and the pressure sensor is located at the outlet end of the diaphragm pressure regulating valve.

[0011] Furthermore, the air resistance is a metal powder sintered filter element installed at the outlet of the first ultra-micro solenoid valve.

[0012] Furthermore, the inlet of the gas storage container is connected to the gas supply source through a one-way inflation valve.

[0013] Furthermore, the gas storage container is a high-pressure gas storage cylinder.

[0014] The beneficial effects of the utility model are as follows: the small-sized gas flow rapid conversion system of the utility model is insensitive to changes in ambient temperature and pressure, has a fast response speed, can perform rapid gas flow conversion, and can realize microfluidic, high-speed and precise control. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model discloses a gas circuit diagram of a small-sized gas flow rapid conversion system.

[0016] In the figure: 1-one-way inflation valve; 2-gas storage container; 3-diaphragm pressure regulating valve; 4-pressure sensor; 5-second ultra-micro solenoid valve; 6-first ultra-micro solenoid valve; 7-air resistance; 8-pressure regulating gas path; 9-first gas path; 10-second gas path. DETAILED DESCRIPTION

[0017] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0018] like Figure 1 As shown, a small-sized gas flow rapid conversion system comprises a gas storage container 2, a pressure regulating gas circuit 8, and a first gas circuit 9 and a second gas circuit 10 connected in parallel.

[0019] Specifically, the inlet of the gas storage container 2 is connected to the gas supply source through the one-way inflation valve 1. In this embodiment, the gas storage container 2 is preferably a high-pressure gas storage cylinder, and the gas storage pressure is 0 to 25 MPa. It should be noted that the material of the gas storage tank can be metal, but is not limited to metal. In some embodiments, the gas storage container 2 is a high-pressure hydrogen storage bottle.

[0020] In the small gas flow rapid conversion system, a diaphragm pressure regulating valve 3 and a pressure sensor 4 are provided in the pressure regulating gas circuit 8. The diaphragm pressure regulating valve 3 is used to adjust the cylinder gas whose pressure is gradually reduced to a pressure maintained within a stable range for output; the pressure sensor 4 is used to detect the outlet pressure of the diaphragm pressure regulating valve 3.

[0021] In the small-scale gas flow rapid conversion system, one parallel end of the first gas path 9 and the second gas path 10 is connected to the outlet of the gas storage container 2 through the pressure regulating gas path 8, and the other parallel end is connected to the use end.

[0022] Among them, the first gas path 9 is provided with a normally closed first ultra-micro solenoid valve 6 and an air block 7. The air block 7 is a metal powder sintered filter element installed at the outlet of the first ultra-micro solenoid valve 6, which is used to stabilize the outlet gas flow of the first ultra-micro solenoid valve 6. In this embodiment, the first ultra-micro solenoid valve 6 adopts an ultra-micro solenoid valve of model X-6-05-LF produced by Parker, USA. Since a metal powder sintered filter element is used as the air block 7, the precision is higher and the corrosion resistance is stronger.

[0023] A normally closed second ultra-micro solenoid valve 5 is provided in the second gas path 10. In this embodiment, the second ultra-micro solenoid valve 5 is also an ultra-micro solenoid valve of model X-6-05-LF produced by Parker, USA.

[0024] When in use, the first gas path 9 / the second gas path 10 can be opened and closed by opening and closing the first ultra-micro solenoid valve 6 / the second ultra-micro solenoid valve 5 .

[0025] The utility model discloses a small-sized gas flow rapid conversion system, and its operation mode and principle are as follows: the gas in the gas supply source enters the gas storage container 2 through the one-way inflation valve 1 and is stored; the diaphragm pressure regulating valve 3 is adjusted to adjust the outlet pressure to the required pressure value; when the user end needs a small amount of gas, the first ultra-micro solenoid valve 6 is opened, the first gas path 9 is connected, and the gas is transported to the user end after the gas resistance 7 is stabilized; when the user end needs a large amount of gas, the first ultra-micro solenoid valve 6 and the second ultra-micro solenoid valve 5 are opened, the first gas path 9 and the second gas path 10 are both connected, the gas in the first gas path 9 is transported to the user end after the gas resistance 7 is stabilized, and the gas in the second gas path 10 is directly transported to the user end. The small-sized gas flow rapid conversion system has a simple structure and is easy to operate. The size of the gas storage container 2 can be adjusted according to the use requirements of the detection equipment (user end), which is convenient for miniaturization, is insensitive to changes in ambient temperature and pressure, and has a fast response speed. Rapid gas flow conversion can be performed, and microfluidic and high-speed precision control can be achieved through the gas resistance 7 steady flow.

[0026] The technical principle of the present invention is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanations here, technicians in this field can think of other specific implementation methods of the present invention without creative work, and these methods will fall within the protection scope of the present invention.

Claims

1. A small gas flow rapid conversion system, characterized in that: It comprises a gas storage container (2), a pressure regulating gas circuit (8), and a first gas circuit (9) and a second gas circuit (10) connected in parallel; One parallel end of the first gas path (9) and the second gas path (10) is connected to the outlet of the gas storage container (2) through the pressure regulating gas path (8), and the other parallel end is connected to the use end; The first gas path (9) is provided with a normally closed first ultra-micro solenoid valve (6) and an air block (7), wherein the air block (7) is a metal powder sintered filter element installed at the outlet of the first ultra-micro solenoid valve (6); and the second gas path (10) is provided with a normally closed second ultra-micro solenoid valve (5).

2. A small-sized gas flow rapid conversion system according to claim 1, characterized in that: A diaphragm pressure regulating valve (3) is provided in the pressure regulating gas circuit (8).

3. A small-sized gas flow rapid conversion system according to claim 2, characterized in that: A pressure sensor (4) is also provided in the pressure regulating gas circuit (8), and the pressure sensor (4) is located at the outlet end of the diaphragm pressure regulating valve (3).

4. A small-sized gas flow rapid conversion system according to claim 1, characterized in that: The inlet of the gas storage container (2) is connected to the gas supply source via a one-way inflation valve (1).

5. A small-sized gas flow rapid conversion system according to claim 1 or 4, characterized in that: The gas storage container (2) is a high-pressure gas storage cylinder.

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