A gas calibration device

Abstract

The utility model provides a kind of gas calibration device.The gas calibration device includes: first gas supply source, for providing the gas of first concentration;Second gas supply source, for providing the gas of second concentration;Air flow control component, the air flow control component includes air pressure regulating element, first gas path switch element and second gas path switch element, the first gas path switch element respectively with the second gas path switch element and the air pressure regulating element are communicated by gas path;Wherein, the first gas supply source with the first gas path switch element is communicated by gas path, the second gas supply source with the second gas path switch element is communicated by gas path, the air pressure regulating element's air outlet end is used to connect the sensor to be calibrated.By the gas calibration device, different concentration of standard gas source can be switched automatically in order and calibration is executed, greatly simplifies operation, improves efficiency, avoids artificial operation error.

Description

Technical Field

[0001] This utility model relates to the field of gas calibration technology, and in particular to a gas calibration device. Background Technology

[0002] Gas calibration, as a technology to ensure the accuracy of gas detection equipment, plays an irreplaceable fundamental role in modern industrial safety, environmental monitoring, and scientific research. Traditional gas calibration methods require repeatedly replacing standard gas cylinders of different concentrations during multi-concentration calibration. Each time a standard gas cylinder is replaced, the operator must manually close the valve of the current cylinder, disassemble and replace it with a new one, and then reconnect the pipeline and open the valve of the new cylinder. This process is not only tedious and time-consuming but also requires operators to have a certain level of experience and proficiency. Furthermore, manual operation is not only inefficient but also prone to introducing various errors, causing the calibrated equipment to fail to accurately measure the concentration of the target gas in actual use, thus reducing its reliability and dependability. Utility Model Content

[0003] This invention provides a gas calibration device that can automatically switch between different concentrations of calibration gas sources in sequence and perform calibration, which greatly simplifies the operation, improves efficiency, and avoids human error.

[0004] This utility model provides a gas calibration device, comprising: A first gas supply source is used to provide a gas of a first concentration; A second gas supply source is used to provide a gas of a second concentration; An airflow control component, comprising an air pressure regulating element, a first air path switching element, and a second air path switching element, wherein the first air path switching element is connected to the second air path switching element and the air pressure regulating element via air paths; The first gas supply source is connected to the first gas circuit switch element via a gas circuit, the second gas supply source is connected to the second gas circuit switch element via a gas circuit, and the outlet of the pressure regulating element is used to connect to the sensor to be calibrated.

[0005] In one possible implementation, when the first gas circuit switch element is turned on and the second gas circuit switch element is turned off, the gas of the first concentration can flow sequentially through the first gas circuit switch element and the gas pressure regulating element, and be output from the outlet of the gas pressure regulating element. When the first gas circuit switch element and the second gas circuit switch element are turned on, the gas of the second concentration can flow sequentially through the second gas circuit switch element, the first gas circuit switch element, and the gas pressure regulating element, and be output from the outlet of the gas pressure regulating element.

[0006] In one possible implementation, the gas calibration device further includes an air pump connected to the second gas circuit switching element via a gas circuit, the air pump being used to provide air.

[0007] In one possible implementation, the gas calibration device further includes a controller, which is electrically connected to the first gas supply source, the second gas supply source, the first gas circuit switching element, the second gas circuit switching element, and the gas pump, respectively. After the gas of the first concentration flows sequentially through the first gas circuit switch element and the gas pressure regulating element, the controller controls the first gas supply source and the second gas supply source to close, controls the first gas circuit switch element and the second gas circuit switch element to open, and then starts the air pump to blow out air to remove the residual gas of the first concentration.

[0008] In one possible implementation, the first and second pneumatic circuit switching elements are solenoid valves, and the pneumatic pressure regulating element is a pressure regulating valve.

[0009] In conjunction with the first aspect, in one possible implementation, the first gas supply source and the second gas supply source are gas generators.

[0010] In one possible implementation, the controller is also electrically connected to the pressure regulating element, the controller being used to control the pressure of the pressure regulating element and to receive pressure data fed back by the pressure regulating element.

[0011] In one possible implementation, the gas calibration device further includes a calibration gas balance detection unit, wherein the first gas supply source and / or the second gas supply source includes a gas generation unit and a gas storage unit, and the calibration gas balance detection unit is used to detect the gas balance data in the gas storage unit.

[0012] In one possible implementation, the gas calibration device further includes: a display for displaying the operating status of the gas calibration device; and control buttons for triggering the generation of control signals.

[0013] In one possible implementation, the gas calibration device further includes an indicator light, which illuminates in a preset manner to indicate the operating status of the gas calibration device.

[0014] The gas calibration device provided by this invention can automatically switch between gas supply sources of different concentrations through gas circuit switching elements (first gas circuit switching element and second gas circuit switching element) in the airflow control component. According to the preset calibration program, the on / off state of the gas circuit switching elements is controlled, so that the gas from the first gas supply source or the second gas supply source is sequentially delivered to the sensor to be calibrated through the gas circuit, eliminating the need for manual replacement of gas cylinders and automating the calibration process. Attached Figure Description

[0015] Figure 1 This is a first structural schematic diagram of the gas calibration device provided in this embodiment of the present invention.

[0016] Figure 2 This is a second structural schematic diagram of the gas calibration device provided in this embodiment of the present invention.

[0017] Figure 3 This is a schematic diagram of the third structure of the gas calibration device provided in this embodiment of the present invention.

[0018] Explanation of main component symbols: First gas supply source - 11; Second gas supply source - 12; First gas circuit switch element - 13; Second gas circuit switch element - 14; Gas pressure regulating element - 15; Air pump - 16; Controller - 17; Display - 18; Control button - 19; Indicator light - 20; Sensor to be calibrated - 21; Gas circuit - 22, 23, 24, 25.

[0019] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this utility model. Detailed Implementation

[0020] The following description of various embodiments of the present invention is based on the accompanying drawings.

[0021] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. "Fixed connection" means that the components are connected to each other and their relative positional relationship remains unchanged after connection. "Rotary connection" means that the components are connected to each other and can rotate relative to each other after connection. The term "integral molding" means that during the formation of one of a plurality of components, that component is connected to the other components without requiring further processing (such as bonding, welding, snap-fit ​​connection, screw connection) to connect the two components together. The directional terms mentioned in the embodiments of this utility model, such as "top," "bottom," "inner," "outer," and "side," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this utility model, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0022] Please see Figure 1 , Figure 1 This is a schematic diagram of the gas calibration device provided in this embodiment of the present invention. The gas calibration device includes a first gas supply source 11 for providing gas of a first concentration; a second gas supply source 12 for providing gas of a second concentration; and an airflow control assembly, which includes a pressure regulating element 15, a first gas path switch element 13, and a second gas path switch element 14. The first gas path switch element 13 is connected to the second gas path switch element 14 and the pressure regulating element 15 through a gas path. The first gas supply source 11 is connected to the first gas path switch element 13 through a gas path, and the second gas supply source 12 is connected to the second gas path switch element 14 through a gas path. The outlet of the pressure regulating element 15 is used to connect to the sensor 21 to be calibrated.

[0023] It should be noted that the sensor 21 to be calibrated can be a gas detection device, which is a sensor instrument used to detect and measure the concentration of a specific gas in the environment. After receiving the incoming calibration gas, the sensor inside the gas detection device (such as an electrochemical sensor, infrared sensor, etc.) begins to detect its concentration. The gas detection device compares the detected concentration with a fixed concentration set by the calibration device, and performs corresponding calibration adjustments based on the comparison result.

[0024] The user can connect the sensor 21 to be calibrated to the outlet of the pressure regulating element 15, and then start the gas calibration device. The gas calibration device sequentially provides calibration gas of known concentration through its first gas supply source 11 and second gas supply source 12. This calibration gas is precisely delivered to the interior of the sensor 21 to be calibrated through the airflow control assembly (including the pressure regulating element 15 and the gas path switching element).

[0025] It should be understood that the function of the gas circuit switching element is to control the on / off state of the gas, precisely controlling the gas flow path. When the first gas supply source 11 is turned on and the second gas supply source 12 is turned off, the first gas supply source 11 produces a gas of a first concentration. Through the control of the airflow control component, the gas of the first concentration is guided into the interior of the sensor 21 to be calibrated for calibration at the first concentration. When the second gas supply source 12 is turned on and the first gas supply source 11 is turned off, the second gas supply source 12 produces a gas of a second concentration. Through the control of the airflow control component, the gas of the second concentration is guided into the interior of the sensor 21 to be calibrated for calibration at the second concentration. Thus, through the airflow control component, automatic switching between gas supply sources of different concentrations can be achieved, eliminating the need for manual gas cylinder replacement and automating the calibration process.

[0026] In some embodiments, when the first gas circuit switch element 13 is turned on and the second gas circuit switch element 14 is turned off, gas of the first concentration can flow sequentially through the first gas circuit switch element 13 and the pressure regulating element 15, and be output from the outlet of the pressure regulating element 15; when the first gas circuit switch element 13 and the second gas circuit switch element 14 are turned on, gas of the second concentration can flow sequentially through the second gas circuit switch element 14, the first gas circuit switch element 13, and the pressure regulating element 15, and be output from the outlet of the pressure regulating element 15.

[0027] Specifically, when the first gas path switching element 13 is turned on and the second gas path switching element 14 is turned off, gas of the first concentration begins to flow from the first gas supply source 11. Since the first gas path switching element 13 is turned on, the gas can pass smoothly through this switching element. Then, the gas continues to flow and enters the pressure regulating element 15. The function of the pressure regulating element 15 is to ensure that the gas is output at a stable pressure, avoiding the impact of pressure fluctuations on calibration accuracy. After pressure regulation, the gas of the first concentration is output from the outlet of the pressure regulating element 15 and finally enters the interior of the sensor 21 to be calibrated, used to calibrate the sensor's detection accuracy for this concentration of gas. When the first gas path switching element 13 and the second gas path switching element 14 are turned on, gas of the second concentration begins to flow from the second gas supply source 12. Since the second gas path switching element 14 is turned on, the gas can pass smoothly through this switching element. Subsequently, the gas continues to flow and enters the first gas path switching element 13. At this time, the first gas path switching element 13 is also in a turned-on state, so the gas can pass smoothly. The gas then enters the pressure regulating element 15, where it is also regulated to ensure a stable gas pressure output. The second concentration of gas, after pressure regulation, is output from the outlet of the pressure regulating element 15 and introduced into the interior of the sensor 21 to be calibrated, for calibrating the sensor's detection accuracy for that concentration of gas.

[0028] To avoid cross-contamination of the gas path, in some embodiments, the gas calibration device further includes an air pump 16, which is connected to the second gas path switching element 14 via a gas path. The air pump 16 is used to provide air. Specifically, the main function of the air pump 16 is to provide clean air to clean the gas path and sensor, ensuring the purity of the gas path and the accuracy of the calibration during the calibration process. In some embodiments, the gas calibration device further includes a controller 17, which is electrically connected to a first gas supply source 11, a second gas supply source 12, a first gas path switching element 13, a second gas path switching element 14, and a gas pump 16, respectively. After the gas of the first concentration flows sequentially through the first gas path switching element 13 and the pressure regulating element 15, the controller 17 controls the first gas supply source 11 and the second gas supply source 12 to close, controls the first gas path switching element 13 and the second gas path switching element 14 to open, and then starts the gas pump 16 to blow out air to remove the residual gas of the first concentration. The controller 17 is electrically connected to the first gas supply source 11, the second gas supply source 12, the first gas path switching element 13, the second gas path switching element 14, and the gas pump 16 to control these components.

[0029] For example, in this embodiment, when calibration using a gas of a first concentration is required, the controller 17 sends a signal to start the first gas supply source 11 and simultaneously shuts off the second gas supply source 12. The controller 17 controls the first gas path switching element 13 to be turned on and the second gas path switching element 14 to be turned off. The gas of the first concentration flows out from the first gas supply source 11, flows sequentially through the first gas path switching element 13 and the pressure regulating element 15, and finally exits from the outlet of the pressure regulating element 15, entering the sensor to be calibrated. After the calibration of the first concentration gas is completed, it is necessary to remove the residual first concentration gas in the gas path system to avoid interference with subsequent calibrations. Specifically, the controller 17 controls the first gas supply source 11 and the second gas supply source 12 to be turned off to ensure that no new gas enters the system. The controller 17 controls the first gas path switching element 13 and the second gas path switching element 14 to be turned on, providing a passage for the gas pump 16. The controller 17 starts the air pump 16. The clean air generated by the air pump 16 flows sequentially through the second gas path switching element 14, the first gas path switching element 13, and the pressure regulating element 15, and is finally output from the outlet of the pressure regulating element 15 to the sensor 21 to be calibrated. The clean air purges the gas path system, removing any residual first-concentration gas and ensuring the cleanliness and purity of the gas path system. After completing the calibration of the first-concentration gas and removing residual gas, the controller 17 will enter the calibration stage for the second-concentration gas. Specifically, firstly, the controller 17 controls the air pump 16 to stop working, ensuring that clean air no longer enters the gas path system. Then, the controller 17 controls the second gas supply source 12 to start working, while keeping the first gas supply source 11 closed. Next, the controller 17 controls the second gas path switching element 14 and the first gas path switching element 13 to be turned on. Gas of the second concentration flows out from the second gas supply source 12, sequentially passing through the second gas path switching element 14, the first gas path switching element 13, and the pressure regulating element 15, finally exiting from the outlet of the pressure regulating element 15 and entering the sensor 21 to be calibrated. It is evident that the clean air provided by the air pump 16 removes residual gas from the gas path system, avoiding cross-contamination and improving calibration accuracy.

[0030] Optionally, the first gas path switching element 13 and the second gas path switching element 14 are solenoid valves, and the gas pressure regulating element 15 is a pressure regulating valve. The solenoid valve is used to control the on / off state of the gas, and the solenoid valve achieves rapid and precise switching operation through an electrical control signal. The pressure regulating valve is used to regulate the gas pressure to ensure that the gas has a stable pressure before entering the sensor 21 to be calibrated. The pressure regulating valve can adjust the output pressure as needed to ensure the accuracy of the calibration process.

[0031] In some embodiments, the first gas supply source 11 and the second gas supply source 12 are gas generators. The gas generators are used to produce calibration gases of different concentrations. The first gas supply source 11 produces a gas of a first concentration, and the second gas supply source 12 produces a gas of a second concentration. These gas generators can precisely control the concentration and flow rate of the gas as needed. The gas generators can generate gas of a specific concentration based on one of the following principles: chemical reaction, gas mixing, or permeation. It should be understood that the controller 17 can control the operating status of the gas generator, gas circuit switching elements, and gas pump 16 via electrical connections to ensure the automation and accuracy of the calibration process.

[0032] Please refer to 2 and 3 together. In some embodiments, the first gas path switching element 13 is connected to the first gas supply source 11 through gas path 22, and the second gas path switching element 14 is connected to the second gas supply source 12 through gas path 23. The air pump 16 is connected to the second gas path switching element 14 through gas path 25. The gas path can be a gas delivery pipe.

[0033] In some embodiments, the controller 17 is also electrically connected to the pressure regulating element 15. The controller 17 controls the pressure of the pressure regulating element 15 and receives pressure data fed back by the pressure regulating element 15. The controller 17 can send instructions to the pressure regulating element 15 to set the required output pressure according to calibration requirements. The controller 17 receives real-time pressure data fed back by the pressure regulating element 15 to monitor and adjust the pressure, ensuring the stability of the calibration process.

[0034] Optionally, the gas calibration device further includes a calibration gas balance detection unit. The first gas supply source 11 and / or the second gas supply source 12 include a gas generation unit and a gas storage unit. The calibration gas balance detection unit is used to detect the gas balance data in the gas storage unit. The gas generation unit can generate gas of a specific concentration. The generated gas enters the gas storage unit, which stores a certain amount of gas to ensure the continuity of gas supply. For example, the calibration gas balance detection unit can be a pressure sensor or a flow sensor. The pressure sensor calculates the gas balance by measuring the gas pressure in the gas storage unit. The flow sensor calculates the gas consumption by measuring the gas flow rate. By accumulating the flow rate data, the amount of gas used can be known, thereby calculating the remaining gas amount. The calibration gas balance detection unit can be installed on the gas storage unit to monitor the gas balance data in real time. The detection unit feeds back the monitored data to the controller 17, which performs real-time analysis and processing based on this data. When the gas balance is lower than a set threshold, the controller 17 will trigger an alarm to remind the operator to replenish the gas. For example, when the gas pressure in the gas storage unit drops to 0.2 bar, the pressure sensor sends a signal to the controller 17, which then activates the alarm system to alert the operator. To prevent calibration interruptions or errors due to gas depletion, the controller 17 can automatically stop the calibration process when the remaining gas level falls below a set threshold.

[0035] Please see Figure 2 The gas calibration device also includes: a display 18 for displaying the operating status of the gas calibration device; and control buttons 19 for triggering the generation of control signals. The display 18 and control buttons 19 are electrically connected to the controller 17. For example, the display 18 is used to display the current calibration process status in real time, such as the current gas concentration, pressure regulation status, and calibration progress. The display 18 can also display alarm information: when the calibration gas reserve is insufficient or the pressure is abnormal, the display 18 will display corresponding alarm information to remind the operator to handle the situation promptly. The control buttons 19 are the user interface of the gas calibration device and are used to trigger the generation of control signals. After the operator presses the control button 19, the controller 17 receives the signal and starts the calibration process.

[0036] Please see Figure 2In some embodiments, the gas calibration device further includes an indicator light 20, which illuminates according to a preset pattern to indicate the working status of the gas calibration device. The indicator light 20 is electrically connected to the controller 17, which controls the indicator light 20 to illuminate according to the corresponding preset pattern based on the working status of the gas calibration. For example, when the calibration data meets the preset standard, the indicator light 20 illuminates green, indicating successful calibration. When the calibration data does not meet the preset standard, the indicator light 20 illuminates red, indicating calibration failure and requiring recalibration. When the pressure data fed back by the pressure regulating element 15 (pressure regulating valve) is within the normal range, the indicator light 20 remains in a normal state (e.g., illuminated green). When the pressure data fed back by the pressure regulating element 15 exceeds the normal range, the controller 17 issues an alarm signal, the indicator light 20 flashes (e.g., illuminates red), and the calibration process is paused. When the gas balance detection unit detects that the gas balance in the gas storage unit is within the safe range, the indicator light 20 remains in a normal state. When the calibration gas balance detection unit detects that the gas balance in the gas storage unit is lower than the set threshold, the controller 17 issues a warning signal, the indicator light 20 flashes (e.g., turns on yellow), and the calibration process is automatically paused.

[0037] The above description is merely a specific implementation of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A gas calibration device, characterized by, include: A first gas supply source is used to provide a gas of a first concentration; A second gas supply source is used to provide a gas of a second concentration; An airflow control component, comprising an air pressure regulating element, a first air path switching element, and a second air path switching element, wherein the first air path switching element is connected to the second air path switching element and the air pressure regulating element via air paths; The first gas supply source is connected to the first gas circuit switch element via a gas circuit, the second gas supply source is connected to the second gas circuit switch element via a gas circuit, and the outlet of the pressure regulating element is used to connect to the sensor to be calibrated.

2. The gas calibration device of claim 1, wherein, When the first gas circuit switch element is turned on and the second gas circuit switch element is turned off, the gas of the first concentration can flow sequentially through the first gas circuit switch element and the gas pressure regulating element, and be output from the outlet of the gas pressure regulating element; When the first gas circuit switch element and the second gas circuit switch element are turned on, the gas of the second concentration can flow sequentially through the second gas circuit switch element, the first gas circuit switch element, and the gas pressure regulating element, and be output from the outlet of the gas pressure regulating element.

3. The gas calibration device of claim 2, wherein, The gas calibration device also includes an air pump, which is connected to the second gas circuit switch element via a gas circuit, and the air pump is used to provide air.

4. The gas calibration device of claim 3, wherein, The gas calibration device further includes a controller, which is electrically connected to the first gas supply source, the second gas supply source, the first gas circuit switch element, the second gas circuit switch element, and the gas pump, respectively. After the gas of the first concentration flows sequentially through the first gas circuit switch element and the gas pressure regulating element, the controller controls the first gas supply source and the second gas supply source to close, controls the first gas circuit switch element and the second gas circuit switch element to open, and then starts the air pump to blow out air to remove the residual gas of the first concentration.

5. The gas calibration device of claim 4, wherein, The first and second air circuit switching elements are solenoid valves, and the air pressure regulating element is a pressure regulating valve.

6. The gas calibration device according to any one of claims 1 to 5, characterized in that The first gas supply source and the second gas supply source are gas generators.

7. The gas calibration device of claim 4, wherein, The controller is also electrically connected to the pressure regulating element. The controller is used to control the pressure of the pressure regulating element and to receive the pressure data fed back by the pressure regulating element.

8. The gas calibration device of claim 1, wherein, The gas calibration device further includes a calibration gas balance detection unit. The first gas supply source and / or the second gas supply source include a gas generation unit and a gas storage unit. The calibration gas balance detection unit is used to detect the gas balance data in the gas storage unit.

9. The gas calibration device of claim 1, wherein, The gas calibration device further includes: A display screen is used to show the operating status of the gas calibration device; Control buttons are used to trigger the generation of control signals.

10. The gas calibration device according to claim 1, characterized in that, The gas calibration device also includes an indicator light, which illuminates according to a preset pattern to indicate the working status of the gas calibration device.

Images