Multi-element gas automatic mixing device

Abstract

The utility model discloses a multi-element gas automatic mixing device which comprises a plurality of gas branches, all the gas branches are jointly connected with a gas main path, the gas main path is connected with a mixing tank, the gas main path is provided with a static mixer, the mixing tank is provided with a dynamic mixer, and the static mixer is connected with the dynamic mixer. A gas outlet of the mixing tank is sequentially provided with a first-stage buffer tank, a second-stage buffer tank, a third-stage buffer tank and a first gas storage chamber in the gas conveying direction, and efficient mixing of gas is achieved through a static mixer and a dynamic mixer. The static mixer utilizes a spiral structure to generate rotation and turbulent flow to promote uniform mixing of gas; under the condition that the gas flow speed is lower or the gas types are more, the dynamic mixer is provided with an electric stirring blade, the mixing uniformity is further improved through mechanical stirring, the gas enters the buffer tank after being mixed through the arrangement of the multi-stage buffer tank, the pressure fluctuation is reduced, and the flow speed is homogenized. And the repeated diffusion and distribution process in the buffer tank improves the mixing uniformity of the gas.

Description

Technical Field

[0001] This utility model relates to the field of gas mixing equipment, and in particular to an automatic mixing device for multiple gases. Background Technology

[0002] Gas mixing involves combining different gases in a specific ratio. Some gases require mixing during production to facilitate direct use. Precise control of the proportions of the mixed gases is essential during gas mixing.

[0003] In the existing technology, the pure mechanical gas mixer has the following problems: (1) When mixing different gases (argon, oxygen, carbon dioxide, etc.), the gas ratio accuracy is only ±1%, which cannot be applied to the field of high-end mixed gas demand; (2) There is a lack of mixing device, and the mixing efficiency and effect are generally poor; (3) The mixing ratio adjustment is not flexible and requires manual adjustment. Automatic control and data recording cannot be achieved, and remote online monitoring cannot be achieved. Utility Model Content

[0004] Purpose of the invention: The purpose of this invention is to provide an automatic multi-gas mixing device that achieves efficient gas mixing through static and dynamic mixers. The static mixer utilizes a spiral structure to generate rotation and turbulence, promoting uniform gas mixing. When the gas flow rate is low or there are many types of gases, the dynamic mixer is equipped with electrically driven stirring blades to further improve the mixing uniformity through mechanical stirring.

[0005] Technical solution:

[0006] An automatic multi-gas mixing device includes multiple gas branches, all of which are connected to a main gas line. The main gas line is connected to a mixing tank. The main gas line is equipped with a static mixer, and the mixing tank is equipped with a dynamic mixer. The gas outlet of the mixing tank is sequentially provided with a primary buffer tank, a secondary buffer tank, a tertiary buffer tank, and a first gas storage chamber along the gas conveying direction. The volumes of the primary buffer tank, the secondary buffer tank, and the tertiary buffer tank gradually increase.

[0007] Preferably, the static mixer includes positive spiral blades and negative spiral blades disposed within a pipe.

[0008] Preferably, the dynamic mixer includes stirring blades disposed inside the mixing tank and a control motor disposed outside the mixing tank.

[0009] Preferably, the air inlets and outlets of the primary buffer tank, secondary buffer tank, and tertiary buffer tank should be arranged diagonally.

[0010] Preferably, the three-stage buffer tank has multiple chambers arranged sequentially along the gas conveying direction, with the air inlets and outlets of different chambers arranged diagonally.

[0011] Preferably, the secondary buffer tank is provided with two gas outlets, one of which is connected to the tertiary buffer tank and the other is connected to a second gas storage chamber.

[0012] Preferably, each branch includes at least one shut-off valve, one solenoid valve, one filter, one temperature and pressure sensor, one pressure reducing valve, one pressure gauge, one electric proportional regulating valve, one mass flow meter, and one check valve connected to the PLC controller.

[0013] Preferably, the PLC controller is equipped with a control panel for manually setting the gas ratio and flow rate when needed, suitable for debugging or emergency operation.

[0014] Preferably, each branch is provided with, in sequence along the gas delivery direction, a first shut-off valve, a first solenoid valve, a filter, a first temperature and pressure sensor, a first pressure gauge, a second shut-off valve, a pressure reducing valve, a second pressure gauge, a third shut-off valve, an electric proportional regulating valve, a fourth shut-off valve, a fifth shut-off valve, a mass flow meter, a sixth shut-off valve, a second temperature and pressure sensor, a third pressure gauge, a check valve, and a second solenoid valve.

[0015] Beneficial effects:

[0016] 1. By setting up static and dynamic mixers, the static mixer relies on its internal spiral structure to generate rotation and turbulence in different gases, accelerating the mixing process. The static mixer can effectively divide and recombine gas flows, causing the gas to undergo multiple splitting and merging during the flow process, thereby achieving uniform mixing. When the gas flow rate is low or there are many types of gases, a dynamic mixer with stirring blades can be used. The stirring blades are driven by an electric motor, and the gases are uniformly mixed through mechanical stirring, making it suitable for more complex or demanding gas mixing applications.

[0017] 2. A multi-stage buffer tank is installed. After gas mixing, it enters the buffer tank to buffer pressure fluctuations in the gas flow and homogenize the gas flow rate. This design reduces airflow pulsation and allows the gas sufficient time to diffuse and distribute evenly within the buffer tank, further improving the gas mixing uniformity. The multiple buffer tanks allow the gas to undergo repeated diffusion and distribution processes within the buffer tanks.

[0018] 3. Equipped with a PLC controller, the central controller connects to all mass flow controllers, sensors, and actuators. Based on the set gas ratio and flow requirements, it automatically adjusts the flow rate of each gas stream to ensure accurate mixing. The central controller achieves precise flow control of each gas stream by adjusting the electric proportional control valve. The control valve can adjust its opening in real time based on feedback signals to adapt to different gas mixing ratios. Attached Figure Description

[0019] Figure 1 This is a structural flowchart of the present invention;

[0020] Figure 2 This is a schematic diagram of the gas branch of this utility model;

[0021] Figure 3 This is a perspective view of the static mixer of this utility model;

[0022] Figure 4 This is a cross-sectional view of the mixing tank of this utility model;

[0023] Figure 5 This is a cross-sectional view of the three-stage buffer tank of this utility model. Detailed Implementation

[0024] To make the technical solution of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] Example 1

[0026] like Figure 1-4 As shown, an automatic multi-gas mixing device includes multiple gas branches 1, all of which are connected to a main gas line 2. The main gas line 2 is connected to a mixing tank 3. The main gas line is equipped with a static mixer 4, and the mixing tank is equipped with a dynamic mixer 5. The gas outlet of the mixing tank 3 is sequentially provided with a primary buffer tank 61, a secondary buffer tank 62, a tertiary buffer tank 63, and a first gas storage chamber 71 along the gas conveying direction. The volumes of the primary, secondary, and tertiary buffer tanks gradually increase.

[0027] In this embodiment, the static mixer 4 includes a positive spiral blade 41 and a negative spiral blade 42 disposed within the pipe. It relies on its internal spiral structure to generate rotation and turbulence in different gases, accelerating the mixing process. The static mixer can effectively divide and recombine gas flows, causing the gas to undergo multiple splitting and merging processes during flow, thereby achieving uniform mixing.

[0028] In this embodiment, the dynamic mixer 5 includes stirring blades 51 disposed inside the mixing tank and a control motor 52 disposed outside the mixing tank. When the gas flow rate is low or there are many types of gases, a dynamic mixer with stirring blades can be used. The stirring blades are driven by an electric motor, and the gases are uniformly mixed by mechanical stirring, which is suitable for more complex or demanding gas mixing applications.

[0029] In this embodiment, the inlets and outlets of the primary, secondary, and tertiary buffer tanks should be arranged diagonally. This effectively increases the flow path of the gas within the buffer tanks, avoids short-circuit flow, and ensures thorough gas mixing.

[0030] In this embodiment, the three-stage buffer tank 63 has multiple chambers arranged sequentially along the gas delivery direction, with the air inlets and outlets of different chambers arranged diagonally. This further increases the gas flow path.

[0031] In this embodiment, the secondary buffer tank has two gas outlets, one connected to the tertiary buffer tank and the other connected to a second gas storage chamber. The use of a tertiary buffer tank can be determined based on actual mixing requirements.

[0032] In this embodiment, each branch includes at least a shut-off valve, a solenoid valve, a filter, a temperature and pressure sensor, a pressure reducing valve, a pressure gauge, an electric proportional regulating valve, a mass flow meter, and a check valve connected to the PLC controller.

[0033] In this embodiment, the PLC controller is equipped with a control panel for manually setting the gas ratio and flow rate when needed, which is suitable for debugging or emergency operation.

[0034] In this embodiment, each branch is sequentially provided with a first shut-off valve 101, a first solenoid valve 102, a filter 103, a first temperature and pressure sensor 104, a first pressure gauge 105, a second shut-off valve 106, a pressure reducing valve 107, a second pressure gauge 108, a third shut-off valve 109, an electric proportional regulating valve 110, a fourth shut-off valve 111, a fifth shut-off valve 112, a mass flow meter 113, a sixth shut-off valve 114, a second temperature and pressure sensor 115, a third pressure gauge 116, a one-way valve 117, and a second solenoid valve 118 along the gas delivery direction.

[0035] Among them, the following components are included: Shut-off valves: Used to switch gas flow on and off, facilitating maintenance and emergency closure. Multiple shut-off valves allow for independent control of flow or isolation at different locations. Solenoid valves: Achieve rapid opening or closing via electrical control, facilitating automated control; typically used at key control points to open or cut off gas flow. Filters: Filter out impurities or particles from the gas, preventing contamination or damage to downstream precision instruments and improving system reliability. Temperature and pressure sensors: Monitor gas temperature and pressure in real time, providing data support for the control system and contributing to stable gas delivery and quality control. Pressure gauges: Display the current gas pressure, allowing operators or the control system to monitor pressure changes in real time and ensure gas pressure remains within safe ranges. Pressure reducing valves: Regulate gas pressure, reducing excessively high pressures to ensure downstream equipment operates under appropriate pressure conditions. Electric proportional control valves: Control gas flow and mixing ratios, precisely controlling gas flow or proportions by adjusting the flow area to achieve accurate mixing of different gases. Mass flow meters: Measure the mass flow rate of passing gas in real time, providing accurate flow data to ensure accurate gas mixing ratios and feedback adjustment by the control system. One-way valve: Prevents gas backflow, avoids cross-contamination between different gases and disruption of gas mixing ratio, and ensures that gas can only flow in one direction.

[0036] The PLC controller connects all mass flow controllers, sensors, and actuators, automatically adjusting the flow rate of each gas stream based on the set gas ratio and flow requirements to ensure accurate mixing. The central controller achieves precise flow control of each gas stream by adjusting the electric proportional control valve. The control valve can adjust its opening in real time based on feedback signals to adapt to the mixing ratio requirements of different gases.

[0037] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. An automatic multi-gas mixing device, comprising multiple gas branches, all gas branches being connected to a main gas line, the main gas line being connected to a mixing tank, characterized in that, The main gas path is equipped with a static mixer, and the mixing tank is equipped with a dynamic mixer. The gas outlet of the mixing tank is sequentially provided with a primary buffer tank, a secondary buffer tank, a tertiary buffer tank, and a first gas storage chamber along the gas conveying direction. The volumes of the primary buffer tank, the secondary buffer tank, and the tertiary buffer tank gradually increase.

2. The multi-element gas automatic mixing device according to claim 1, characterized in that, The static mixer includes positive spiral blades and negative spiral blades disposed within a pipe.

3. The multi-element gas automatic mixing device according to claim 1, characterized in that, The dynamic mixer includes stirring blades installed inside the mixing tank and a control motor installed outside the mixing tank.

4. The multi-element gas automatic mixing device according to claim 1, characterized in that, The air inlets and outlets of the primary, secondary, and tertiary buffer tanks should be arranged diagonally.

5. The multi-element gas automatic mixing device according to claim 1, characterized in that, The three-stage buffer tank has multiple chambers arranged sequentially along the gas delivery direction, with the air inlets and outlets of different chambers arranged diagonally.

6. The multi-element gas automatic mixing device according to claim 1, characterized in that, The secondary buffer tank is equipped with two gas outlets, one of which is connected to the tertiary buffer tank and the other is connected to a second gas storage chamber.

7. The multi-element gas automatic mixing device according to claim 1, characterized in that, Each branch circuit includes at least one shut-off valve, one solenoid valve, one filter, one temperature and pressure sensor, one pressure reducing valve, one pressure gauge, one electric proportional regulating valve, one mass flow meter, and one check valve connected to the PLC controller.

8. The multi-element gas automatic mixing device according to claim 7, characterized in that, The PLC controller is equipped with a control panel for manually setting the gas ratio and flow rate when needed, suitable for debugging or emergency operation.

9. The multi-element gas automatic mixing device according to claim 7, characterized in that, Each branch is sequentially equipped with a first shut-off valve, a first solenoid valve, a filter, a first temperature and pressure sensor, a first pressure gauge, a second shut-off valve, a pressure reducing valve, a second pressure gauge, a third shut-off valve, an electric proportional regulating valve, a fourth shut-off valve, a fifth shut-off valve, a mass flow meter, a sixth shut-off valve, a second temperature and pressure sensor, a third pressure gauge, a check valve, and a second solenoid valve along the gas delivery direction.

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