Modular zero gas generator calibration device

Abstract

The utility model discloses a modularized zero gas generator calibration device, and belongs to the technical field of calibration of gas detection equipment. The device comprises a mobile device system; the standard gas fixing device system is mounted in the front operation area of the moving device system and comprises a multi-gas-cylinder positioning mechanism; the gas distribution control device system is arranged in the middle of the moving device system and is connected with the output end of the standard gas fixing device system; the Fourier infrared analyzer system is mounted in a rear detection area of the mobile device system through a damping base; the software control system is integrated in a control panel of the mobile device system; the gas distribution control device system is respectively connected with the standard gas fixing device system, the Fourier infrared analyzer system and the to-be-tested zero gas generator through a plurality of gas path pipelines, and the software control system is in communication connection with each device system through a data bus. According to the device, automatic switching and calibration of gas paths are realized through software control, and the gas cylinders do not need to be manually replaced.

Description

Technical Field

[0001] This utility model belongs to the field of gas detection equipment calibration technology. It provides a calibration device that can switch different standard gases to the zero gas generator without the need for manual replacement of gas cylinders. Specifically, it relates to a modular zero gas generator calibration device. Background Technology

[0002] Currently, zero-gas generator testing involves simultaneous compressed air testing and testing with standard concentration gases. Furthermore, the Fourier transform infrared (FTIR) analyzer requires background purging with high-purity nitrogen before testing. Therefore, testing a zero-gas generator generally requires at least three standard gas cylinders: one high-purity nitrogen cylinder, one nitrogen dioxide cylinder, and one mixed gas cylinder. Manual operation is then required to change the gas cylinders and tubing before testing the zero-gas generator. Due to the strong adhesion of nitrogen oxides, small amounts of nitrogen oxide gas may remain after switching gas paths, making the operation cumbersome and introducing numerous uncertainties. Utility Model Content

[0003] This invention uses software to intelligently control the switching of gas paths and the flow rate, eliminating the need for manual replacement of gas cylinders to test the zero gas generator. It enables the switching of different standard gases to the zero gas generator, and the gas from the zero gas generator is then fed into a Fourier transform infrared analyzer. By analyzing the measured values ​​of the collected gas under real-time environmental conditions, the measured values ​​of the zero gas generator can be traced online.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A modular zero-gas generator calibration device includes a mobile device system that integrates a walking mechanism and a positioning and stabilizing device.

[0006] A standard gas fixing device system is installed in the front operating area of ​​the mobile device system and includes a multi-cylinder positioning mechanism.

[0007] The gas distribution control system is located in the middle of the mobile device system and is connected to the output end of the standard gas fixed device system.

[0008] The Fourier transform infrared analyzer system is mounted on a shock-absorbing base in the detection area at the rear of the mobile device system.

[0009] The software control system is integrated into the control panel of the mobile device system;

[0010] The gas distribution control system is connected to the standard gas fixing device system, the Fourier transform infrared analyzer system, and the zero gas generator to be tested through multiple gas pipelines. The software control system establishes communication connections with each device system through a data bus.

[0011] Furthermore, the Fourier transform infrared analyzer system includes an infrared light source assembly with an adjustable reflector group structure, a multi-channel detection gas chamber with an inert metal coating on the inner wall surface, a dynamic interferometer module, an integrated laser positioning compensation mechanism, and a gas path switching valve group located at the inlet and outlet ends of the detection gas chamber. The multi-channel detection gas chamber is connected to the gas distribution control device system via an insulated pipeline.

[0012] Furthermore, the gas distribution control device system includes a gas distributor, the input end of which is connected to the standard gas fixing device system via a quick connector, multiple gas distribution branches arranged in parallel, each branch including a control valve, a flow regulator and a pressure buffer connected in sequence, a gas mixing output unit that receives the output gas flow from each gas distribution branch, and a calibration circuit equipped with a bidirectional switching valve connecting the gas mixing output unit to the Fourier transform infrared analyzer system.

[0013] Furthermore, the standard gas fixing device system includes a vertical guide mechanism, anti-tipping limiting structures on both sides, an adjustable clamping mechanism including symmetrically arranged arc-shaped clamping arms and a rack and pinion adjustment device, a bearing platform, a sliding guide rail and a positioning and locking mechanism at the bottom, the inner surface of the arc-shaped clamping arms being provided with a composite anti-slip lining, and the rack and pinion adjustment device including a self-locking adjustment handle.

[0014] Furthermore, the mobile device system includes four sets of omnidirectional wheels, each wheel integrating a hydraulic damping device, a central stabilizing mechanism including a liftable support foot and an electromagnetic brake, and an anti-static grounding module integrated at the bottom of the support foot. The omnidirectional wheels and the central stabilizing mechanism form a composite support structure.

[0015] Furthermore, the software control system includes a main control module, an integrated gas path control logic unit, a data acquisition module with a multi-channel signal input interface, a communication module supporting industrial IoT wireless protocols, and a human-machine interaction module including a touch screen and a status indicator unit. The main control module is connected to the actuator of the gas distribution control device system via a control bus.

[0016] Furthermore, the gas mixing output unit includes a Venturi mixer with a tapered converging flow channel structure, a turbulence generator with built-in spiral guide vanes, an outlet pressure stabilizing chamber with a honeycomb damping structure on the inner wall, and the Venturi mixer and the turbulence generator are coaxially connected.

[0017] Furthermore, the gas cylinder group adapted to the standard gas fixing device system includes a high-purity nitrogen cylinder, a purge gas path connected to the gas distribution control device system, a multi-component standard gas cylinder storing a reference mixed gas of oxygen, carbon monoxide, and nitrogen dioxide, and a dynamic dilution device connected downstream of the multi-component standard gas cylinder, which includes a multi-stage proportional regulating valve group. The output end of the dynamic dilution device forms a closed-loop calibration circuit.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] This invention utilizes software to intelligently control gas path switching and flow rate, eliminating the cumbersome manual replacement of gas cylinders and tubing, thus improving operational convenience and work efficiency, avoiding nitrogen oxide residue, enhancing detection accuracy, and enabling reliable online traceability of measurement values. Its multi-channel gas path architecture gas distribution control device precisely manages gas and avoids waste. The standard gas fixing device is compatible with different sized standard gas cylinders and is easy to replace, resulting in excellent equipment adaptability. Bottom casters facilitate movement, and the anti-vibration test chamber ensures stable operation of core components, balancing mobility and stability. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the overall rear view structure of this utility model.

[0022] In the diagram: 1. Fourier transform infrared analyzer system; 2. Gas distribution control device system; 3. Standard gas fixing device system; 4. Moving device system; 5. Software control system. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1

[0025] like Figures 1-2 As shown, a modular zero-gas generator calibration device includes a mobile device system that integrates a walking mechanism and a positioning and stabilizing device.

[0026] A standard gas fixing device system is installed in the front operating area of ​​the mobile device system and includes a multi-cylinder positioning mechanism.

[0027] The gas distribution control system is located in the middle of the mobile device system and is connected to the output end of the standard gas fixed device system.

[0028] The Fourier transform infrared analyzer system is mounted on a shock-absorbing base in the detection area at the rear of the mobile device system.

[0029] The software control system is integrated into the control panel of the mobile device system;

[0030] The gas distribution control system is connected to the standard gas fixing device system, the Fourier transform infrared analyzer system, and the zero gas generator to be tested through multiple gas pipelines. The software control system establishes communication connections with each device system through a data bus.

[0031] The Fourier transform infrared analyzer system includes an infrared light source assembly with an adjustable reflector group structure, a multi-channel detection gas chamber with an inert metal coating on the inner wall surface, a dynamic interferometer module, an integrated laser positioning compensation mechanism, and a gas path switching valve group located at the inlet and outlet ends of the detection gas chamber. The multi-channel detection gas chamber is connected to the gas distribution control device system via insulated pipelines.

[0032] The gas distribution control system includes a gas distributor, whose input end is connected to the standard gas fixing device system via a quick-connect coupling; multiple gas distribution branches arranged in parallel, each branch containing a control valve, a flow regulator, and a pressure damper connected in sequence; a gas mixing output unit that receives the output gas flow from each gas distribution branch; and a calibration circuit equipped with a bidirectional switching valve connecting the gas mixing output unit to the Fourier transform infrared analyzer system.

[0033] The standard gas fixing device system includes a vertical guide mechanism with anti-tipping limiting structures on both sides, an adjustable clamping mechanism including symmetrically arranged arc-shaped clamping arms and a rack and pinion adjustment device, a bearing platform with a sliding guide rail and a positioning and locking mechanism at the bottom, a composite anti-slip lining on the inner surface of the arc-shaped clamping arms, and a rack and pinion adjustment device including a self-locking adjustment handle.

[0034] The mobile device system includes four sets of omnidirectional wheels, each wheel integrating a hydraulic damping device, a central stabilizing mechanism including liftable support feet and an electromagnetic brake, and an anti-static grounding module integrated at the bottom of the support feet. The omnidirectional wheels and the central stabilizing mechanism form a composite support structure.

[0035] The software control system includes a main control module, an integrated gas path control logic unit, a data acquisition module with multi-channel signal input interfaces, a communication module that supports industrial IoT wireless protocols, and a human-machine interaction module that includes a touch screen and a status indicator unit. The main control module is connected to the actuator of the gas distribution control device system via a control bus.

[0036] The gas mixing output unit includes a Venturi mixer with a tapered converging flow channel structure, a turbulence generator with built-in spiral guide vanes, an outlet pressure stabilizing chamber with a honeycomb damping structure on the inner wall, and the Venturi mixer and the turbulence generator are coaxially connected.

[0037] The gas cylinder group adapted to the standard gas stationary system includes a high-purity nitrogen cylinder, a purge gas path connected to the gas distribution control system, a multi-component standard gas cylinder storing a reference mixed gas of oxygen, carbon monoxide, and nitrogen dioxide, and a dynamic dilution device connected downstream of the multi-component standard gas cylinder, which includes a multi-stage proportional control valve group. The output of the dynamic dilution device forms a closed-loop calibration circuit.

[0038] Specifically, the Fourier transform infrared (FTIR) analyzer system is mainly responsible for measuring the gas output from the zero gas generator. It should be capable of rapid and stable qualitative and quantitative analysis of various gases that absorb infrared light. Measurements should require no pretreatment, wet chemical analysis, or cumbersome calibration. Furthermore, it should have the capability to measure low-concentration gases, and can simultaneously measure gases such as O2, CO, NO, CO2, and C3H8. The main technical parameters are as follows:

[0039] CO, NO, NO₂:

[0040] Measurement range: (0~20)×10⁻⁶;

[0041] Indication error: not exceeding ±2%FS.

[0042] Limit of detection: not greater than 0.1×10⁻⁶ (measured by introducing a concentration of 0.5×10⁻⁶).

[0043] Repeatability: not greater than 0.1 × 10⁻⁶ or not greater than 1%;

[0044] Stability: Not exceeding ±2%;

[0045] C3H8, CO2:

[0046] Measurement range: (0~40)×10⁻⁶;

[0047] Indication error: not exceeding ±2%FS.

[0048] Limit of detection: not greater than 0.2×10⁻⁶ (measured by introducing a concentration of 1×10⁻⁶);

[0049] Repeatability: not greater than 0.2 × 10⁻⁶ or not greater than 1%;

[0050] Stability: Not exceeding ±2%;

[0051] O_2:

[0052] Measurement range: (0~25)×10⁻²;

[0053] Indication error: Absolute error not exceeding ±0.2×10⁻²; relative error not exceeding ±1%.

[0054] Limit of detection: not greater than 0.1×10⁻² (measured by introducing a concentration of 0.5×10⁻²).

[0055] Repeatability: not greater than 0.1 × 10⁻² or not greater than 0.5%;

[0056] Stability: Not exceeding ±1%;

[0057] The gas distribution control system adopts a multi-channel gas path architecture, with each channel being independently controllable. With advanced control components, it can accurately switch gas on / off and precisely regulate parameters such as flow rate. During operation, it intelligently controls the opening and closing of valves and the degree of opening, and combined with a high-precision flow controller, it accurately supplies gas to gas-using equipment or reaction environment according to preset flow values, thereby achieving precise gas path management and avoiding gas waste.

[0058] The calibration gas fixing device system has an adjustable telescopic fixing device that can be adapted to calibration gas cylinders of different sizes. It also features a push-pull drawer design for easy replacement of calibration gas.

[0059] The mobile device system is equipped with high-quality rollers at the bottom, which are wear-resistant, quiet and flexible, making it easy to move the whole system in different indoor work areas. It is equipped with a vibration-proof test chamber, which uses special shock-absorbing materials and structure to effectively isolate external vibrations and ensure the stable operation of the Fourier transform infrared analyzer and gas distribution control system.

[0060] As the core operating platform of the gas control system, the software control system has powerful control functions. Users can control the gas path opening and closing through a simple interface. The software integrates advanced flow control algorithms, which can accurately control the gas flow.

[0061] Specific implementation process:

[0062] S1. Move the device to a suitable position and position and stabilize it through the central stabilizing mechanism of the moving device system. According to the size of the standard gas cylinder, use the adjustable clamping mechanism of the standard gas fixing device system and the sliding guide rail and positioning locking mechanism of the bearing platform to fix the high-purity nitrogen cylinder, multi-component standard gas cylinder and other gas cylinder groups.

[0063] S2. Connect the standard gas fixing device system, gas distribution control device system, Fourier transform infrared analyzer system and the zero gas generator to be tested through multiple gas pipelines. Set the gas path control logic and preset flow values ​​and other parameters on the touch screen of the software control system. Use the control valves and flow regulators of the gas distribution control device system to ensure that each gas path is independently controllable.

[0064] S3. First, the gas in the high-purity nitrogen cylinder is used to purge the gas path through the gas distribution control system to remove impurities. Then, the reference mixed gas in the multi-component standard gas cylinder is diluted by the dynamic dilution device to form a gas of appropriate concentration, which is then mixed evenly in the gas mixing output unit.

[0065] S4. The mixed gas enters the Fourier transform infrared analyzer system through the bidirectional switching valve of the calibration loop. The infrared light source component, dynamic interferometer module, etc. work together to measure the gas in the multi-channel detection chamber. The measurement data is transmitted to the data acquisition module of the software control system through the data bus.

[0066] S5. The main control module of the software control system analyzes and processes the collected data, compares it with the preset standard value, and obtains the relevant parameters of the output gas of the zero gas generator under test, such as indication error, repeatability, and stability, and calibrates the zero gas generator accordingly.

[0067] S6. After the measurement and calibration work is completed, purge the gas path again with gas from the high-purity nitrogen cylinder, shut down all device systems, release the positioning of the mobile device system, and move the device to a suitable storage location.

[0068] In summary, the modular zero-gas generator calibration device of this invention provides an innovative solution with broad market application prospects.

[0069] It should be noted that the parts not covered by this utility model are the same as or can be implemented using existing technology.

[0070] Furthermore, in the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," "set up," "equipped with," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0071] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can exercise their rights without departing from the scope of the present utility model.

Claims

1. A modular zero-gas generator calibration device, characterized in that, Includes a mobile device system, which integrates a walking mechanism and a positioning and stabilization device; A standard gas fixing device system is installed in the front operating area of ​​the mobile device system and includes a multi-cylinder positioning mechanism. The gas distribution control system is located in the middle of the mobile device system and is connected to the output end of the standard gas fixed device system. The Fourier transform infrared analyzer system is mounted on a shock-absorbing base in the detection area at the rear of the mobile device system. The software control system is integrated into the control panel of the mobile device system; The gas distribution control system is connected to the standard gas fixing device system, the Fourier transform infrared analyzer system, and the zero gas generator to be tested through multiple gas pipelines. The software control system establishes communication connections with each device system through a data bus.

2. The modular zero-gas generator calibration device as described in claim 1, characterized in that, The Fourier transform infrared analyzer system includes an infrared light source assembly with an adjustable reflector group structure, a multi-channel detection gas chamber with an inert metal coating on the inner wall surface, a dynamic interferometer module, an integrated laser positioning compensation mechanism, and a gas path switching valve group located at the inlet and outlet ends of the detection gas chamber. The multi-channel detection gas chamber is connected to the gas distribution control device system via an insulated pipeline.

3. The modular zero-gas generator calibration device as described in claim 2, characterized in that, The gas distribution control system includes a gas distributor, whose input end is connected to the standard gas fixing device system via a quick connector; multiple gas distribution branches arranged in parallel; each branch includes a control valve, a flow regulator, and a pressure buffer connected in sequence; a gas mixing output unit that receives the output gas flow from each gas distribution branch; and a calibration circuit equipped with a bidirectional switching valve connecting the gas mixing output unit to the Fourier transform infrared analyzer system.

4. The modular zero-gas generator calibration device as described in claim 3, characterized in that, The standard gas fixing device system includes a vertical guide mechanism with anti-tipping limiting structures on both sides, an adjustable clamping mechanism including symmetrically arranged arc-shaped clamping arms and a rack and pinion adjustment device, a bearing platform with a sliding guide rail and a positioning and locking mechanism at the bottom, the inner surface of the arc-shaped clamping arms being provided with a composite anti-slip lining, and the rack and pinion adjustment device including a self-locking adjustment handle.

5. A modular zero-gas generator calibration device as described in claim 4, characterized in that, The mobile device system includes four sets of omnidirectional wheels, each wheel integrating a hydraulic damping device, a central stabilizing mechanism including a liftable support foot and an electromagnetic brake, and an anti-static grounding module integrated at the bottom of the support foot. The omnidirectional wheels and the central stabilizing mechanism form a composite support structure.

6. The modular zero-gas generator calibration device as described in claim 5, characterized in that, The software control system includes a main control module, an integrated gas path control logic unit, a data acquisition module with a multi-channel signal input interface, a communication module supporting industrial IoT wireless protocols, and a human-machine interaction module including a touch screen and a status indicator unit. The main control module is connected to the actuator of the gas distribution control device system via a control bus.

7. The modular zero-gas generator calibration device as described in claim 6, characterized in that, The gas mixing output unit includes a Venturi mixer with a tapered converging flow channel structure, a turbulence generator with built-in spiral guide vanes, an outlet pressure stabilizing chamber, and a honeycomb damping structure on the inner wall. The Venturi mixer and the turbulence generator are coaxially connected.

8. A modular zero-gas generator calibration device as described in claim 7, characterized in that, The gas cylinder group adapted to the standard gas fixing device system includes a high-purity nitrogen cylinder, a purge gas path connected to the gas distribution control device system, a multi-component standard gas cylinder storing a reference mixed gas of oxygen, carbon monoxide, and nitrogen dioxide, and a dynamic dilution device connected downstream of the multi-component standard gas cylinder, which includes a multi-stage proportional regulating valve group. The output end of the dynamic dilution device forms a closed-loop calibration circuit.

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