A built-in on-line automatic calibration device for gas analyzers

Abstract

The application relates to a built-in online automatic calibration device for a gas analyzer, belonging to the technical field of gas detector calibration, and comprising a control module, an actuating mechanism and a packaged standard gas tank. When the control module triggers a calibration program, the actuating mechanism drives a zero-point standard gas tank or a range standard gas tank to move from an idle area inside the detector body to a detection light path, so that a measurement light beam penetrates through standard gas inside the packaged standard gas tank, a detector probe receives a light signal and transmits the light signal to a signal processing module, the signal processing module compares a measurement value with a theoretical optical characteristic of the standard gas, and corrects a zero-point reference or a range reference of the detector body. The application overcomes the defects of low artificial calibration efficiency, a complex external system and incomplete single-point calibration.

Description

Technical Field

[0001] This invention relates to a built-in online automatic calibration device for a gas analyzer, belonging to the field of gas detector calibration technology. Background Technology

[0002] Gas analyzers are devices used to determine the concentration of gas components. The accuracy of their readings is directly related to production process control, product quality, environmental monitoring compliance, and on-site safety.

[0003] To ensure its long-term stable operation, regular calibration is required. Currently, the mainstream existing calibration technologies can be mainly divided into the following categories: 1. Manual on-site calibration: Personnel bring standard gas cylinders to the site, manually connect the pipeline and introduce standard gas, and adjust the analyzer's zero point and measuring range. This method is cumbersome, highly dependent on manual labor, and poses safety hazards when operating in high-altitude or hazardous areas.

[0004] 2. External Automatic Calibration: This method achieves remote triggering calibration by connecting to an independent external standard gas system (including gas cylinders, valves, and long-distance pipelines). While this method solves the problem of personnel movement, the system structure is complex, and the standard gas is prone to concentration distortion due to leakage or adsorption when transported through long-distance pipelines, affecting calibration accuracy.

[0005] 3. Single-point automatic calibration: Some systems have a simple automatic function, but it is usually limited to zero-point calibration by introducing zero-point gas (such as high-purity nitrogen). It cannot calibrate key measurement range points and cannot fully guarantee the linear accuracy of the instrument.

[0006] Therefore, improvements are urgently needed. Summary of the Invention

[0007] To overcome the shortcomings of the prior art, the present invention designs a built-in online automatic calibration device for gas analyzers, which overcomes the defects of low efficiency of manual calibration, complex external systems, and incomplete single-point calibration.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: Technical Solution 1 A built-in online automatic calibration device for a gas analyzer, comprising: Control module: used to trigger the calibration program and output control signals according to a preset cycle or remote command; Actuator: electrically connected to the control module, including a drive mechanism, which drives the action according to the control signal; Encapsulated calibration gas cylinders: at least one set is provided, each set of encapsulated calibration gas cylinders includes a zero-point calibration gas cylinder and a range calibration gas cylinder; each set of encapsulated calibration gas cylinders is connected to the drive mechanism and is movably set between the idle area inside the detector body and the detection optical path; When the control module triggers the calibration procedure, the actuator drives the zero-point calibration gas cylinder or the range calibration gas cylinder to move from the idle area inside the detector body to the detection optical path, so that the measuring beam penetrates the standard gas inside the sealed calibration gas cylinder. The detector probe receives the optical signal and transmits it to the signal processing module. The signal processing module compares the measured value with the theoretical optical properties of the standard gas and corrects the zero-point reference or range reference of the detector body.

[0009] Furthermore, the sealed standard gas canister is a sealed canister pre-sealed with standard gas, and both ends of the sealed standard gas canister are provided with optical windows for the measurement beam to penetrate perpendicularly when inserted into the detection optical path.

[0010] Furthermore, the drive mechanism includes a housing, a drive cylinder disposed within the housing, and a flipping and shifting mechanism mounted on the lifting rod of the drive cylinder. The housing is installed inside the detector body and is disposed between the detector light source and the detector probe. The housing is also provided with a detection window for input and output of the measurement beam. At least one set of the packaged standard gas cylinders is mounted on a flip-over mechanism, which is electrically connected to a control module and is used to flip one set of packaged standard gas cylinders and enter the calibration station according to the control instructions of the control module.

[0011] Furthermore, the flipping and repositioning mechanism includes a rotating cylinder, a fixed cylinder spaced inside the rotating cylinder, and a drive motor installed between the rotating cylinder and the fixed cylinder for driving the rotating cylinder to rotate. The drive motor is electrically connected to the control module. The rotating cylinder is equipped with a flipping assembly corresponding to each group of packaged standard gas canisters. The flipping assembly includes two bent flipping rods arranged along the outer periphery of the rotating cylinder. The outer end of the bent flipping rod is bent and fixedly connected to the packaged standard gas canister. The inner end of the bent flipping rod rotates through the outer wall of the rotating cylinder and is rotatably installed with a toggle assembly. The fixed cylinder is provided with two symmetrical flipping positions. When the rotating cylinder rotates and drives the toggle assembly to pass through the flipping positions, the bent flipping rod will flip 180°.

[0012] Furthermore, the actuating assembly includes a flip plate, and a pair of laterally spaced flip wheels are rotatably connected to the side of the flip plate near the fixed cylinder, the flip wheels being disposed in contact with the bottom end of the fixed cylinder; The flipping position includes a flipping groove formed on the fixed cylinder, a turning groove is provided in the middle of the flipping groove, and triangular plates adapted to the shape of the flipping groove are provided at intervals at the bottom end of the flipping groove. A flipping path is formed between the triangular plates and the flipping groove for driving the flipping plates to flip.

[0013] Furthermore, the rotating cylinder, the fixed cylinder, and the bottom end of the fixed cylinder are all open, and a support platform is fixedly connected to the middle of the bottom end of the fixed cylinder. The bottom end of the support platform is detachably connected to the lifting rod through a mounting plate. A fixing plate is fixedly connected to the side of the support platform, and the triangular plate is fixedly connected to the fixing plate.

[0014] Furthermore, a solenoid valve is fixedly installed on the side of the housing. The solenoid valve is connected to the air source and the drive cylinder respectively, and the solenoid valve is electrically connected to the control module.

[0015] Furthermore, the flipping and switching mechanism is equipped with two sets of sealed standard gas cylinders.

[0016] Furthermore, the width of the flipping path and the width of the turning groove are both adapted to the diameter of the flipping wheel.

[0017] Technical Solution Two A gas analyzer includes a built-in online automatic calibration device according to one of the above-mentioned technical solutions.

[0018] Compared with the prior art, the present invention has the following features and beneficial effects: 1. This invention integrates the encapsulated standard gas cylinders into the main body of the detector and uses an actuator to drive the zero-point standard gas cylinder and the range standard gas cylinder directly to the detection optical path for calibration. This completely eliminates the complex structure of traditional external standard gas cylinders and long-distance delivery pipelines, fundamentally avoiding the concentration distortion problem caused by leakage or adsorption of standard gas during long-distance delivery, and significantly improving the accuracy of calibration. At the same time, since no manual on-site operation is required, the calibration process is fully automated, which not only greatly reduces the cost of manual maintenance, but also eliminates the safety risks to operators in harsh environments such as high temperature, high altitude, or harmful environments.

[0019] 2. This invention can perform zero-point calibration and range calibration separately, realizing full-range correction of the analyzer. Compared with the single-point automatic calibration method in the prior art that can only perform zero-point calibration, this device can simultaneously correct the zero-point drift and range drift of the analyzer, ensuring that the measurement data of the detector body remains accurate and reliable throughout the full range. It is especially suitable for environmental monitoring and process control scenarios with strict requirements for measurement accuracy.

[0020] 3. The various sets of encapsulated standard gas cylinders in this invention are installed via a flip-and-switch mechanism. When one set is in operation, the other set remains in standby mode, forming a hot backup mechanism. When an abnormal situation occurs, such as accidental leakage, optical window contamination, or mechanical failure, the control module can immediately switch to the standby set to perform calibration, avoiding the failure of the entire calibration system due to the failure of a single standard gas cylinder. At the same time, the flip-and-switch mechanism enables the two sets of encapsulated standard gas cylinders to be used alternately. The control module can use a preset switching strategy to ensure that the two sets of standard gas cylinders share the calibration task evenly, preventing a single set of standard gas cylinders from being exhausted prematurely due to excessive use. This keeps the consumption rate of the two sets of standard gas cylinders synchronized, maximizing the effective service life of each set of standard gas cylinders and reducing the frequency of standard gas cylinder replacement and the corresponding maintenance costs. Attached Figure Description

[0021] Figure 1 This is a connection block diagram of the present invention; Figure 2 This is a schematic diagram of the installation structure of the actuator of the present invention; Figure 3 This is a three-dimensional structural diagram of the flip-and-change positioning mechanism of the present invention in conjunction with the drive cylinder; Figure 4 This is a three-dimensional structural diagram of the flip-and-change mechanism of the present invention from a first-view perspective; Figure 5 This is a schematic diagram of the flip position in the flip-shift mechanism of the present invention; Figure 6 This is a three-dimensional structural schematic diagram of the flip-and-change mechanism of the present invention from a second perspective; Figure 7 This is the present invention. Figure 6 An enlarged structural diagram of point A.

[0022] The attached figures are labeled as follows: 100, Actuator; 1, Housing; 11, Waiting Area; 12, Measuring Area; 13, Solenoid Valve; 14, Drive Cylinder; 141, Lifting Rod; 1411, Mounting Plate; 15, Flip-and-Change Mechanism; 151, Support Platform; 1511, Fixing Plate; 1512, Triangular Plate; 1513, Flipping Slot; 1514, Turning Slot; 1515, Flipping Path; 152, Rotating Cylinder; 153, Bending Flipping Rod; 154, Flipping Plate; 155, Flipping Wheel; 156, Fixing Cylinder; 200, Control Module; 300, Detector Light Source; 400, Detector Body; 500, Encapsulated Standard Gas Canister; 501, Zero Point Standard Gas Canister; 502, Range Standard Gas Canister; 600, Detector Probe; 700, Signal Processing Module. Detailed Implementation

[0023] The present invention will now be described in more detail with reference to the embodiments.

[0024] Example 1 Please see Figure 1 The built-in online automatic calibration device for a gas analyzer in this embodiment includes: Control module 200: used to trigger the calibration program and output control signals according to a preset cycle or remote command; Actuator 100: Electrically connected to control module 200, including drive mechanism, which drives action according to control signal; The sealing calibration gas cylinder 500 is provided in two sets. Each set of sealing calibration gas cylinders 500 includes a zero-point calibration gas cylinder 501 and a range calibration gas cylinder 502. That is, in this embodiment, there are two zero-point calibration gas cylinders 501 and two range calibration gas cylinders 502.

[0025] Specifically, the sealed standard gas canister 500 is a sealed canister pre-sealed with standard gas, and both ends of the sealed standard gas canister 500 are provided with optical windows for the measurement beam to pass through perpendicularly when inserted into the detection optical path.

[0026] When one set of sealed standard gas cylinders 500 reaches the end of its service life or fails, the control module 200 can automatically switch to another set of sealed standard gas cylinders 500 to perform calibration, thereby ensuring the long-term continuous availability of the calibration device; or the two sets of sealed standard gas cylinders 500 can be used alternately, so that the two sets of sealed standard gas cylinders 500 take turns to undertake the calibration task, thereby balancing the usage frequency of each standard gas cylinder.

[0027] Specifically, each set of sealed standard gas cylinders 500 is connected to the drive mechanism and is movably positioned between the idle area inside the detector body 400 and the detection optical path.

[0028] When the control module 200 triggers the calibration procedure, the actuator 100 drives the zero-point calibration gas cylinder 501 or the range calibration gas cylinder 502 from the idle area inside the detector body 400 to the detection optical path, so that the measuring beam penetrates the standard gas inside the encapsulated calibration gas cylinder 500. The detector probe 600 receives the optical signal and transmits it to the signal processing module 700. The signal processing module 700 compares the measured value with the theoretical optical characteristics of the standard gas and corrects the zero-point reference or range reference of the detector body 400.

[0029] Specifically, the measuring beam is emitted by the detector light source 300, and after penetrating the standard gas inside the sealed standard gas canister 500, it is received by the detector probe 600.

[0030] As can be seen from the above description, the beneficial effect of the present invention is that by integrating the encapsulated standard gas cylinder 500 into the detector body 400, and using the actuator 100 to drive the zero-point standard gas cylinder 501 and the range standard gas cylinder 502 directly to the detection optical path for calibration, the device completely eliminates the complex structure of traditional external standard gas cylinders and long-distance delivery pipelines, fundamentally avoiding the concentration distortion problem caused by leakage or adsorption of standard gas during long-distance delivery, and significantly improving the accuracy of calibration.

[0031] Meanwhile, since no manual on-site operation is required and the calibration process is fully automated, it not only significantly reduces the cost of manual maintenance, but also eliminates the safety risks to operators in harsh environments such as high temperature, high altitude or harmful conditions.

[0032] This device can perform zero-point calibration and range calibration separately, realizing full-range correction of the analyzer. Compared with the single-point automatic calibration method in the existing technology that can only perform zero-point calibration, this device can simultaneously correct the zero-point drift and range drift of the analyzer, ensuring that the measurement data of the detector body 400 remains accurate and reliable throughout the full range. It is especially suitable for environmental monitoring and process control scenarios with strict requirements for measurement accuracy.

[0033] Example 2 Please see Figures 2 to 7 The built-in online automatic calibration device for the gas analyzer in this embodiment, based on the above embodiment one, includes a drive mechanism comprising a housing 1, a drive cylinder 14 disposed within the housing 1, and a flip-and-change mechanism 15 mounted on the lifting rod 141 of the drive cylinder 14. The housing 1 is installed inside the detector body 400 and is disposed between the detector light source 300 and the detector probe 600. The housing 1 is also provided with a detection window for input and output of the measurement beam.

[0034] Both sets of sealed standard gas cylinders 500 are mounted on the flip-over mechanism 15, which is electrically connected to the control module 200. The flip-over mechanism 15 is used to flip one set of sealed standard gas cylinders 500 and enter the calibration station according to the control command of the control module 200.

[0035] Specifically, the flipping and repositioning mechanism 15 includes a rotating cylinder 152, a fixed cylinder 156 spaced inside the rotating cylinder 152, and a drive motor installed between the rotating cylinder 152 and the fixed cylinder 156 for driving the rotating cylinder 152 to rotate. The drive motor is electrically connected to the control module 200. When working, the control module 200 controls the drive motor to start, thereby driving the rotating cylinder 152 to rotate.

[0036] The rotating cylinder 152 is equipped with a flipping assembly corresponding to each group of sealed standard gas canisters 500. The flipping assembly includes two bent flipping rods 153 arranged along the outer periphery of the rotating cylinder 152. The outer end of the bent flipping rod 153 is bent and fixedly connected to the sealed standard gas canister 500. The inner end of the bent flipping rod 153 rotates through the outer wall of the rotating cylinder 152 and is rotatably installed with a toggle assembly. The fixed cylinder 156 is provided with two symmetrical flipping positions. When the rotating cylinder 152 rotates and drives the toggle assembly to pass through the flipping positions, the bent flipping rod 153 will flip 180°, thereby realizing the position switching of the sealed standard gas canister 500.

[0037] Specifically, the actuating assembly includes a flip plate 154, and a pair of laterally spaced flip wheels 155 are rotatably connected to the side of the flip plate 154 near the fixed cylinder 156. The flip wheels 155 are disposed in contact with the bottom end of the fixed cylinder 156. The flipping position includes a flipping groove 1513 formed on the fixed cylinder 156. A turning groove 1514 is provided in the middle of the flipping groove 1513. Triangular plates 1512 adapted to the shape of the flipping groove 1513 are provided at intervals at the bottom end of the flipping groove 1513. A flipping path 1515 for driving the flipping plate 154 to flip is formed between the triangular plates 1512 and the flipping groove 1513.

[0038] As can be seen from the above description, when the control module 200 triggers the calibration program, it first controls the drive cylinder 14 to start, the lifting rod 141 of the drive cylinder 14 extends, driving the flip-change mechanism 15 to rise as a whole, so that the encapsulated standard gas canister 500 installed on the flip-change mechanism 15 rises from the waiting area 11 inside the housing 1 to the measurement area 12 corresponding to the detection window, preparing it to enter the calibration station.

[0039] Subsequently, the control module 200 controls the drive motor in the flip-shift mechanism 15 to start, and the drive motor drives the rotating cylinder 152 to rotate. When the rotating cylinder 152 rotates, the actuating component rotates together with the rotating cylinder 152.

[0040] When the rotating cylinder 152 rotates and drives the actuating assembly past the first flip position, the flipping wheel 155 moves along the flipping path 1515. Under the guidance of the triangular plate 1512 and the actuating groove 1514, the flipping plate 154 flips, thereby driving the bent flipping rod 153 to flip 180° around its rotation connection point with the rotating cylinder 152.

[0041] Since the outer end of the bending and flipping rod 153 is fixedly connected to the packaging standard gas canister 500, the flipping of the bending and flipping rod 153 causes the packaging standard gas canister 500 to flip 180° synchronously, thereby flipping the packaging standard gas canister 500, which was originally in the standby position, to the calibration station, and making the optical windows at both ends of the packaging standard gas canister 500 coaxially aligned with the detection window on the housing 1, as well as the detector light source 300 and the detector probe 600.

[0042] Once the standard gas container 500 is accurately positioned at the calibration station, the measuring beam emitted by the light source 300 of the detector passes sequentially through the detection window on the housing 1 and the optical window at one end of the standard gas container 500. After penetrating the standard gas inside the standard gas container 500 vertically, the beam exits from the optical window at the other end, passes through another detection window on the housing 1, and is finally received by the detector probe 600.

[0043] The signal processing module 700 compares the received measurement value with the theoretical optical properties of the standard gas to complete zero-point calibration or range calibration.

[0044] After calibration, the control module 200 controls the drive motor to continue rotating, and the toggle component passes the second flip position, causing the bending flip rod 153 to continue to flip 180°, thereby causing the sealed standard gas canister 500 to reset to the standby position.

[0045] Subsequently, the control module 200 controls the lifting rod 141 of the drive cylinder 14 to retract, driving the flip-and-change mechanism 15 to descend as a whole, so that the sealed standard gas canister 500 returns to the idle area inside the detector body 400, and the detector body 400 resumes normal measurement state.

[0046] Two sets of sealed standard gas cylinders 500 are installed via a flip-up switching mechanism 15. When one set is in operation, the other set remains in standby mode, forming a hot backup mechanism. In the event of an accidental leak, optical window contamination, or mechanical failure in the standard gas cylinder of the working group, the control module 200 can immediately switch to the standby set to perform calibration, thus preventing the entire calibration system from failing due to a single standard gas cylinder malfunction.

[0047] Meanwhile, the two sets of sealed standard gas cylinders 500 can be used alternately through the flip-and-change mechanism 15. The control module 200 can make the two sets of standard gas cylinders bear the calibration task equally according to the preset switching strategy (such as alternating according to the number of calibrations or alternating according to the time cycle), so as to avoid the single set of standard gas cylinders being exhausted prematurely due to excessive use. This keeps the consumption rate of the two sets of standard gas cylinders synchronized, maximizes the effective service life of each set of standard gas cylinders, and reduces the replacement frequency of standard gas cylinders and the corresponding maintenance costs.

[0048] Specifically, the rotating cylinder 152, the fixed cylinder 156, and the bottom of the fixed cylinder 156 are all open, and a support platform 151 is fixedly connected to the middle of the bottom of the fixed cylinder 156. The bottom of the support platform 151 is detachably connected to the lifting rod 141 through the mounting plate 1411.

[0049] Meanwhile, a fixing plate 1511 is fixedly connected to the side of the support platform 151, and a triangular plate 1512 is fixedly connected to the fixing plate 1511.

[0050] Furthermore, a solenoid valve 13 is fixedly installed on the side of the housing 1. The solenoid valve 13 is connected to the air source and the drive cylinder 14 respectively, and the solenoid valve 13 is electrically connected to the control module 200. The installation of the solenoid valve 13 and the drive cylinder 14 significantly improves the long-term operational stability and reliability of the drive system under high-temperature conditions, and ensures the accurate execution of the calibration action.

[0051] Furthermore, the width of the flipping path 1515 and the width of the turning groove 1514 are adapted to the diameter of the flipping wheel 155, ensuring that the flipping wheel 155 will not wobble or deviate in position due to excessive gap when moving along the flipping path 1515, nor will it get stuck or rub excessively due to insufficient gap.

[0052] Example 3 A gas analyzer includes the built-in online automatic calibration device described in Embodiments 1 and 2 above.

[0053] The working principle of this invention is as follows: When the control module 200 triggers the calibration program, the actuator 100 drives the zero-point calibration gas cylinder 501 or the range calibration gas cylinder 502 from the idle area inside the detector body 400 to the detection optical path, so that the measuring beam penetrates the standard gas inside the encapsulated calibration gas cylinder 500. The detector probe 600 receives the optical signal and transmits it to the signal processing module 700. The signal processing module 700 compares the measured value with the theoretical optical characteristics of the standard gas and corrects the zero-point reference or range reference of the detector body 400.

[0054] In the description of this invention, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not 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 limiting this invention.

[0055] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0056] Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

Claims

1. A built-in online automatic calibration device for a gas analyzer, characterized in that: include: Control module (200): used to trigger the calibration program and output control signals according to a preset cycle or remote command; Actuator (100): electrically connected to the control module (200), including a drive mechanism, which drives an action according to a control signal; Encapsulated calibration gas cylinder (500): At least one set is provided, and each set of encapsulated calibration gas cylinder (500) includes a zero-point calibration gas cylinder (501) and a range calibration gas cylinder (502); each set of encapsulated calibration gas cylinder (500) is connected to the drive mechanism and is movably set between the idle area inside the detector body (400) and the detection optical path; When the control module (200) triggers the calibration procedure, the actuator (100) drives the zero-point calibration gas cylinder (501) or the range calibration gas cylinder (502) from the idle area inside the detector body (400) to the detection optical path, so that the measurement beam penetrates the standard gas inside the encapsulated calibration gas cylinder (500). The detector probe (600) receives the optical signal and transmits it to the signal processing module (700). The signal processing module (700) compares the measured value with the theoretical optical characteristics of the standard gas and corrects the zero-point reference or range reference of the detector body (400).

2. The built-in online automatic calibration device for a gas analyzer according to claim 1, characterized in that: The encapsulated standard gas canister (500) is a sealed canister pre-encapsulated with standard gas, and optical windows are provided at both ends of the encapsulated standard gas canister (500) for the measurement beam to penetrate vertically when inserted into the detection optical path.

3. The built-in online automatic calibration device for a gas analyzer according to claim 1, characterized in that: The drive mechanism includes a housing (1), a drive cylinder (14) disposed in the housing (1), and a flip-up mechanism (15) mounted on the lifting rod (141) of the drive cylinder (14). The housing (1) is installed inside the detector body (400), and the housing (1) is disposed between the detector light source (300) and the detector probe (600). The housing (1) is also provided with a detection window for input and output of the measurement beam. At least one set of the encapsulated standard gas cylinders (500) are mounted on the flip-over mechanism (15), which is electrically connected to the control module (200) and is used to flip one set of encapsulated standard gas cylinders (500) and enter the calibration station according to the control command of the control module (200).

4. The built-in online automatic calibration device for a gas analyzer according to claim 3, characterized in that: The flipping and repositioning mechanism (15) includes a rotating cylinder (152), a fixed cylinder (156) spaced inside the rotating cylinder (152), and a drive motor installed between the rotating cylinder (152) and the fixed cylinder (156) for driving the rotating cylinder (152) to rotate. The drive motor is electrically connected to the control module (200). The rotating cylinder (152) is equipped with a flipping component corresponding to each group of sealed standard gas canisters (500) on its side. The flipping component includes two bent flipping rods (153) arranged along the outer periphery of the rotating cylinder (152). The outer end of the bent flipping rod (153) is bent and fixedly connected to the sealed standard gas canister (500). The inner end of the bent flipping rod (153) rotates through the outer wall of the rotating cylinder (152) and is rotatably installed with a toggle component. The fixed cylinder (156) is provided with two symmetrical flipping positions. When the rotating cylinder (152) rotates and drives the toggle component to pass through the flipping position, the bent flipping rod (153) will flip 180°.

5. A built-in online automatic calibration device for a gas analyzer according to claim 4, characterized in that: The actuating assembly includes a flip plate (154), and a pair of horizontally spaced flip wheels (155) are rotatably connected to the side of the flip plate (154) near the fixed cylinder (156). The flip wheels (155) are arranged in contact with the bottom end of the fixed cylinder (156). The flipping position includes a flipping groove (1513) opened on the fixed cylinder (156), a turning groove (1514) is provided in the middle of the flipping groove (1513), and triangular plates (1512) adapted to the shape of the flipping groove (1513) are provided at intervals at the bottom end of the flipping groove (1513). A flipping path (1515) for driving the flipping plate (154) to flip is formed between the triangular plate (1512) and the flipping groove (1513).

6. A built-in online automatic calibration device for a gas analyzer according to claim 5, characterized in that: The bottom ends of the rotating cylinder (152), the fixed cylinder (156) and the fixed cylinder (156) are all open, and a support platform (151) is fixedly connected to the middle of the bottom end of the fixed cylinder (156). The bottom end of the support platform (151) is detachably connected to the lifting rod (141) through the mounting plate (1411). A fixing plate (1511) is fixedly connected to the side of the support platform (151), and the triangular plate (1512) is fixedly connected to the fixing plate (1511).

7. A built-in online automatic calibration device for a gas analyzer according to claim 3, characterized in that: A solenoid valve (13) is fixedly installed on the side of the housing (1). The solenoid valve (13) is connected to the air source and the drive cylinder (14) respectively, and the solenoid valve (13) is electrically connected to the control module (200).

8. A built-in online automatic calibration device for a gas analyzer according to claim 4, characterized in that: The flip-up mechanism (15) is equipped with two sets of sealed standard gas cylinders (500).

9. A built-in online automatic calibration device for a gas analyzer according to claim 5, characterized in that: The width of the flipping path (1515) and the width of the turning groove (1514) are both adapted to the diameter of the flipping wheel (155).

10. A gas analyzer, characterized in that: Includes the built-in online automatic calibration device according to any one of claims 1 to 9.

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