Intelligent gas proportioning mixing device

Abstract

This utility model discloses an intelligent gas proportioning mixing device, including a mixing tank. One side of the mixing tank is equipped with inlet pipes one, two, and three for introducing the gas to be mixed, while the other side is equipped with an exhaust pipe for discharging the mixed gas. A mixing assembly for gas mixing is also installed on the mixing tank. Mass flow controllers are installed on inlet pipes one, two, and three. This utility model achieves unidirectional gas flow through an anti-backflow assembly, avoiding pollution and safety hazards caused by backflow. The mass flow controller dynamically adjusts the flow rate, significantly reducing mixing proportion errors and meeting the needs of high-precision applications such as semiconductors and medical devices. The mixing assembly actively agitates the gas using a servo motor-driven stirring plate, significantly improving mixing efficiency. It is also compatible with inert, corrosive, and flammable / explosive gases, comprehensively outperforming existing technologies in terms of safety, accuracy, efficiency, and applicability.

Description

Technical Field

[0001] This utility model relates to the field of gas mixing technology, and in particular to an intelligent gas proportioning mixing device. Background Technology

[0002] In fields such as food preservation, industrial manufacturing, and medical equipment, the precision, safety, and efficiency of gas proportioning devices directly affect product quality and production safety. Existing technologies (such as CN2564239Y) achieve gas mixing through segmented gas filling via solenoid valves and proportional control of pipe cross-sections. While offering advantages such as simple structure and low cost, they have the following limitations:

[0003] Lack of backflow prevention function: Without backflow prevention components, when the gas source pressure fluctuates or the pipeline pressure is abnormal, the gas may flow back to the gas source or pipeline, causing gas source contamination, inaccurate mixing ratio, or even safety accidents (such as backflow of flammable and explosive gases).

[0004] Insufficient accuracy and adaptability: Relying on time control circuits and fixed pipe cross-sectional ratios, it is difficult to dynamically adapt to changes in flow rate, and cannot meet the high-precision requirements of semiconductor manufacturing, medical ventilators (which require real-time concentration adjustment).

[0005] Low mixing efficiency: Mixing by natural diffusion alone results in poor gas mixing uniformity, especially in multi-component gas or high-flow-rate conditions, which prolongs the mixing time and affects production efficiency.

[0006] Limited application scenarios: The original technology was mainly designed for food preservation and did not take into account the compatibility requirements of complex working conditions such as industrial corrosive gases and medical special gases. Utility Model Content

[0007] The purpose of this invention is to provide an intelligent gas proportioning mixing device that achieves unidirectional gas flow through an anti-backflow component, avoiding pollution and safety hazards caused by backflow; a mass flow controller dynamically adjusts the flow rate, significantly reducing mixing ratio errors to meet the needs of high-precision applications such as semiconductors and medical devices; the mixing component actively agitates the gas by driving a stirring plate with a servo motor, significantly improving mixing efficiency; and it is compatible with inert, corrosive, and flammable and explosive gases, comprehensively outperforming existing technologies in terms of safety, accuracy, efficiency, and applicability.

[0008] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0009] A smart gas proportioning mixing device, comprising:

[0010] A mixing tank is provided with an inlet pipe 1, an inlet pipe 2, and an inlet pipe 3 for introducing the gas to be mixed on one side, and an exhaust pipe for discharging the mixed gas on the other side. A mixing assembly for gas mixing is also installed on the mixing tank.

[0011] In the aforementioned intelligent gas proportioning mixing device, mass flow controllers are installed on each of the first, second, and third inlet pipes.

[0012] In the aforementioned intelligent gas proportioning mixing device, the first, second, and third inlet pipes are also equipped with anti-backflow components to prevent gas backflow.

[0013] In the aforementioned intelligent gas proportioning mixing device, the anti-backflow component includes a sealing shell fixedly connected to the air inlet pipe. A sealing ring and a mounting rod are sequentially fixedly connected to the inner wall of the sealing shell. A retaining spring is fixedly connected to the side of the mounting rod, and a sealing plate matching the sealing ring is fixedly connected to the end of the retaining spring.

[0014] In the aforementioned intelligent gas proportioning mixing device, a sealing gasket that matches the sealing ring is fixedly connected to the side of the sealing plate.

[0015] In the aforementioned intelligent gas proportioning mixing device, a limiting slide rod is fixedly connected to the side of the sealing plate, and a limiting slide sleeve matching the limiting slide rod is installed on the mounting rod at a position corresponding to the limiting slide rod.

[0016] In the aforementioned intelligent gas proportioning mixing device, the mixing component includes a servo motor mounted on the mixing tank, an agitator shaft mounted on the output shaft of the servo motor, and an agitator plate mounted on the agitator shaft.

[0017] This utility model has at least the following beneficial effects:

[0018] 1. This utility model realizes an intelligent gas proportioning mixing device, which realizes unidirectional gas flow through the anti-backflow component to avoid pollution and safety hazards caused by backflow; the mass flow controller dynamically adjusts the flow rate, which greatly reduces the mixing ratio error and meets the needs of high-precision scenarios such as semiconductors and medical devices; the mixing component actively disturbs the gas by driving the stirring plate with a servo motor, which significantly improves the mixing efficiency; and it is compatible with inert, corrosive and flammable and explosive gases, and is superior to the existing technology in terms of safety, accuracy, efficiency and applicability.

[0019] 2. Install mass flow controllers in each air inlet pipe to monitor gas flow in real time and dynamically adjust valve opening to greatly reduce mixing ratio error, meet the requirements of semiconductor manufacturing, medical ventilators and other scenarios with extremely high gas purity requirements, and be compatible with inert gases, corrosive gases and flammable and explosive gases, adapting to the needs of multiple fields such as industry, medical care and scientific research.

[0020] 3. Install anti-backflow components in each air inlet pipe. Through the mechanical linkage between the sealing plate and the sealing ring, the pipe will be automatically closed when the gas supply stops, so as to avoid pollution or safety hazards caused by gas backflow.

[0021] 4. Install mixing components inside the mixing tank, and drive the stirring shaft and stirring plate to rotate via a servo motor, forcibly agitating the gas, greatly shortening the mixing time and improving production efficiency. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0023] Figure 1 This is a schematic diagram of the intelligent gas proportioning mixing device of this utility model;

[0024] Figure 2 This is a cross-sectional structural diagram of the intelligent gas proportioning mixing device of this utility model;

[0025] Figure 3 This is a schematic diagram of the anti-backflow component in the intelligent gas proportioning mixing device of this utility model.

[0026] Explanation of icon numbers:

[0027] 1. Mixing tank; 2. Intake pipe one; 3. Intake pipe two; 4. Intake pipe three; 5. Exhaust pipe; 6. Mixing assembly;

[0028] 201. Mass flow controller;

[0029] 202. Anti-backflow assembly; 203. Sealing shell; 2031. Sealing ring; 2032. Sealing plate;

[0030] 204. Mounting rod; 2041. Abutment spring;

[0031] 205. Limiting slide bar; 2051. Limiting slide sleeve;

[0032] 20321, Sealing gasket;

[0033] 601, Servo motor; 6011, Agitator shaft; 6012, Agitator plate. Detailed Implementation

[0034] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0035] Please refer to Figures 1 to 3 As shown, an embodiment of the present invention provides an intelligent gas proportioning mixing device, comprising: a mixing tank 1, an inlet pipe 2, an inlet pipe 3 and an inlet pipe 4 for introducing the gas to be mixed are installed on one side of the mixing tank 1, an exhaust pipe 5 for discharging the mixed gas is installed on the other side of the mixing tank 1, and a mixing component 6 for gas mixing is also installed on the mixing tank 1.

[0036] By adopting the above technical solution, the anti-backflow component 202 enables unidirectional gas flow, avoiding pollution and safety hazards caused by backflow; the mass flow controller 201 dynamically adjusts the flow rate, significantly reducing the mixing ratio error and meeting the needs of high-precision scenarios such as semiconductors and medical applications; the mixing component 6 actively agitates the gas by driving the stirring plate 6012 through the servo motor 601, significantly improving the mixing efficiency; and it is compatible with inert, corrosive, and flammable and explosive gases, comprehensively outperforming existing technologies in terms of safety, accuracy, efficiency, and applicability.

[0037] To achieve high-precision gas ratio mixing, in this embodiment, mass flow controllers 201 are installed on inlet pipe 1 2, inlet pipe 2 3, and inlet pipe 3 4. The mass flow controllers 201 monitor the flow rate of each gas in real time and dynamically adjust the valve opening to greatly reduce the mixing ratio error, thus meeting the requirements of scenarios with extremely high gas purity, such as semiconductor manufacturing and medical ventilators.

[0038] To prevent gas backflow and ensure system safety, in this embodiment, anti-backflow components 202 are also installed on the first intake pipe 2, the second intake pipe 3, and the third intake pipe 4. The anti-backflow component 202 includes a sealing shell 203 fixedly connected to the first intake pipe 2. A sealing ring 2031 and a mounting rod 204 are fixedly connected to the inner wall of the sealing shell 203 in sequence. A retaining spring 2041 is fixedly connected to the side of the mounting rod 204. A sealing plate 2032 matching the sealing ring 2031 is fixedly connected to the end of the retaining spring 2041. When gas is introduced, the sealing plate 2032 is pressed and disengaged from the sealing ring 2031 to ensure effective gas flow. When gas stops flowing, the retaining spring 2041 pushes the sealing plate 2032 to reset, automatically closing the pipeline and avoiding pollution or safety hazards caused by gas backflow.

[0039] To enhance the sealing performance of the anti-backflow component 202, in this embodiment, a sealing gasket 20321 matching the sealing ring 2031 is fixedly connected to the side of the sealing plate 2032. The sealing gasket 20321 fills the tiny gap between the sealing plate 2032 and the sealing ring 2031, improving sealing reliability, and is especially suitable for high pressure or corrosive gas conditions.

[0040] To ensure the stable operation of the anti-backflow component 202, in this embodiment: a limiting slide rod 205 is fixedly connected to the side of the sealing plate 2032, and a limiting sleeve 2051 matching the limiting slide rod 205 is installed on the mounting rod 204 at the position corresponding to the limiting slide rod 205. The limiting slide rod 205 and the limiting sleeve 2051 cooperate to restrict the movement trajectory of the sealing plate 2032, prevent it from deviating or getting stuck, and ensure the long-term stability of the anti-backflow function.

[0041] To improve the gas mixing efficiency in the mixing tank 1, in this embodiment: the mixing component 6 includes a servo motor 601 installed on the mixing tank 1, an agitator 6011 installed on the output shaft of the servo motor 601, and an agitator 6012 installed on the agitator 6011. The agitator 6012 is driven by the servo motor 601 to forcibly disturb the gas, which greatly shortens the mixing time. It is especially suitable for multi-component gas or high-flow-rate conditions, and significantly improves production efficiency.

[0042] The working principle of this utility model is as follows:

[0043] Precise flow control: Mass flow controllers 201 are installed on intake pipe 1 (2), intake pipe 2 (3), and intake pipe 3 (4) to monitor the flow of each gas in real time and dynamically adjust the valve opening, greatly reducing the mixing ratio error and meeting the needs of high-precision scenarios such as semiconductors and medical applications.

[0044] Anti-backflow safety design: Anti-backflow components 202 are added to each air inlet pipe. When gas is introduced, the sealing plate 2032 is compressed and disengages from the sealing ring 2031 to ensure gas flow. When gas stops flowing, the abutment spring 2041 pushes the sealing plate 2032 to reset, automatically closing the pipeline to prevent gas backflow from contaminating the gas source or causing safety accidents.

[0045] Enhanced sealing performance: A sealing gasket 20321 is added between the sealing plate 2032 and the sealing ring 2031 to improve sealing reliability; the limiting slide rod 205 cooperates with the limiting slide sleeve 2051 to prevent the sealing plate 2032 from shifting and ensure the long-term stability of the anti-backflow function.

[0046] Active mixing mechanism: The servo motor 601 drives the stirring shaft 6011 and the stirring plate 6012 to rotate, which forcibly disturbs the gas, significantly shortens the mixing time and improves production efficiency.

[0047] The mass flow controller 201 can be selected from the following models:

[0048] The Alicat MC series: This series can quickly reach setpoints and stably control the mass flow rate, volumetric flow rate, or pressure of over 98 gases, with a control range from 0.01% to 100% of full scale. For example, in semiconductor manufacturing processes, the flow control requirements for some process gases are extremely high. The Alicat MC series mass flow controllers can accurately reduce mixing ratio errors, meeting the needs of high-precision scenarios. Its accuracy can reach ±0.5% of the reading or ±0.05% of full scale.

[0049] The Bronkhorst FLEXI-FLOW Compact series features multi-parameter functionality, integrating gas flow measurement and control, pressure measurement and control, and temperature measurement. It is suitable for a variety of applications, from benchtop bioreactors to fuel cell production. This series includes several models, such as FF-A005 and FF-A020. Through an integrated gas database (containing 22 gases) and real-time conversion, it achieves high-precision measurements, making it particularly suitable for applications requiring extremely high gas purity, such as medical ventilators. It ensures accurate gas mixture ratios, guaranteeing patient respiratory safety.

[0050] The HORIBAS600 is a digital mass flow controller using a 32-bit CPU for digital control. It features excellent flow stability, high accuracy, good linearity, low zero drift, fast airflow response, and minimal overshoot. Its valve body is constructed of stainless steel (316L), and the airtight materials include metal and fluororubber, making it adaptable to various gas environments. For example, in chemical experiments requiring high precision and stability in gas flow control, the HORIBAS600 mass flow controller can stably control gas flow, ensuring the accuracy and repeatability of experimental results. It also offers two optional communication protocols: F-NET and Profibus DP-V0 slave protocol, allowing for various complex metering, control operations, and configurations with a host computer.

[0051] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. An intelligent gas proportion mixing device comprising a mixing tank (1), characterized in that, The mixing tank (1) is equipped with an air inlet pipe 1 (2), an air inlet pipe 2 (3) and an air inlet pipe 3 (4) for the gas to be mixed to be introduced on one side, and an exhaust pipe (5) for the gas to be discharged after mixing is installed on the other side of the mixing tank (1). The mixing tank (1) is also equipped with a mixing component (6) for gas mixing.

2. The intelligent gas proportion mixing device according to claim 1, characterized in that: Mass flow controllers (201) are installed on the first (2), second (3) and third (4) air intake pipes.

3. The intelligent gas proportion mixing device according to claim 2, characterized in that: The first (2), second (3) and third (4) air intake pipes are also equipped with anti-backflow components (202) to prevent gas backflow.

4. The intelligent gas proportioning mixing device according to claim 3, characterized in that: The backflow prevention assembly (202) includes a sealing shell (203) fixedly connected to the intake pipe (2). A sealing ring (2031) and an installation rod (204) are fixedly connected to the inner wall of the sealing shell (203) in sequence. A retaining spring (2041) is fixedly connected to the side of the installation rod (204). A sealing plate (2032) matching the sealing ring (2031) is fixedly connected to the end of the retaining spring (2041).

5. The intelligent gas proportion mixing device according to claim 4, characterized in that: The sealing plate (2032) has a sealing gasket (20321) that matches the sealing ring (2031) fixedly connected to its side.

6. The intelligent gas proportion mixing device according to claim 5, characterized in that: The sealing plate (2032) is fixedly connected to a limiting slide rod (205), and a limiting sleeve (2051) matching the limiting slide rod (205) is installed on the mounting rod (204) at a position corresponding to the limiting slide rod (205).

7. The intelligent gas proportion mixing device according to claim 6, characterized in that: The mixing component (6) includes a servo motor (601) mounted on the mixing tank (1), an agitator shaft (6011) mounted on the output shaft of the servo motor (601), and an agitator plate (6012) mounted on the agitator shaft (6011).

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