Gas calibration device

Abstract

The invention discloses a gas calibration device, and relates to the field of gas calibration, a main control gas transmission cavity of a main control gas circuit module is connected with at least two main control gas inlet holes, and the at least two main control gas inlet holes are communicated with a plurality of sub-control gas circuit modules which are connected in series. Gas to be calibrated enters different sub-control gas circuit modules through different main control gas inlet holes, and the gas to be calibrated enters a portable gas detection alarm instrument of a corresponding sub-control assembly through opening and closing of a sub-control solenoid valve for calibration and testing. The portable gas detection alarm instruments on the different sub-control assemblies are used for calibrating and testing corresponding gases, the portable gas detection alarm instruments do not need to be repeatedly replaced, the gas calibration efficiency is effectively improved, the gas calibration efficiency is relatively high, and the problem that when calibration is carried out on various different gases, the calibration cost is low is solved. The portable gas detection alarm apparatus needs to be repeatedly replaced, and the gas calibration efficiency is low.

Description

Technical Field

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

[0002] In places such as explosion-proof areas, toxic gas leak emergency response sites, and underground pipelines, in order to effectively ensure the safety of workers and prevent damage to production equipment, in accordance with current national standards, relevant personnel are required to wear intrinsically safe devices that can continuously detect the concentration of combustible gases, toxic gases, or oxygen. These intrinsically safe devices (i.e., portable gas detectors) need to be calibrated and tested regularly.

[0003] Traditionally, the calibration and testing of portable gas detectors is carried out by trained professionals using a dedicated calibration hood (one end connected to a standard gas of known concentration and the other end connected to the portable gas detector). This requires repeated switching between multiple gases for various standard gases and multiple portable gas detectors, resulting in low efficiency in gas calibration. Summary of the Invention

[0004] To address the shortcomings of the aforementioned background technology, this invention proposes a gas calibration device that solves the problem of low efficiency in gas calibration due to the need to repeatedly replace portable gas detectors when calibrating various gases.

[0005] The technical solution of this invention is implemented as follows: A gas calibration device includes a main control component and several sub-control components, the sub-control components being connected in series and communicating with the main control component; the main control component includes a main control housing, within which a main control gas path module is provided, the main control gas path module having a main control gas delivery chamber, a main control exhaust port, a main control gas inlet port, and a main control gas outlet port, the main control gas inlet port and the main control gas outlet port being both communicating with the main control gas delivery chamber, the main control gas outlet port being communicating with the sub-control components, and at least two of the main control gas inlets port being connected to the main control gas delivery chamber; the sub-control components include sub-control housings, on which sub-control gas path modules and gas... The calibrated portable gas detector alarm has a sub-controlled gas circuit module equipped with a sub-controlled exhaust port, a sub-controlled air inlet, a sub-controlled exhaust port, a sub-controlled first air outlet, and a sub-controlled second air outlet. A sub-controlled solenoid valve is installed in the channel of the sub-controlled air inlet. The outlet end of the sub-controlled solenoid valve is connected to both the sub-controlled first air outlet and the sub-controlled second air outlet. When the sub-controlled solenoid valve is activated, the outlet end of the sub-controlled solenoid valve is connected to the sub-controlled second air outlet, and closed to the sub-controlled first air outlet. When the sub-controlled solenoid valve is closed, the outlet end of the sub-controlled solenoid valve is connected to the sub-controlled first air outlet, and closed to the sub-controlled second air outlet. The main control air outlet is connected to the sub-control air inlet, the main control exhaust port is connected to the sub-control exhaust port, the sub-control second air outlet is connected to the air inlet of the portable gas detector alarm, the air outlet of the portable gas detector alarm is connected to the sub-control exhaust port, and the sub-control first air outlet is connected to the sub-control air inlet of the adjacent sub-control gas circuit module. At least two main control air inlets are connected to the main control air supply cavity of the main control gas circuit module of this application. The at least two main control air inlets are connected to a number of sub-control gas circuit modules connected in series. Thus, when calibrating for multiple different gases, the gas enters different sub-control gas circuit modules through different main control air inlets. By opening and closing the sub-control solenoid valve, the gas to be calibrated enters the portable gas detector alarm of the corresponding sub-control component for calibration and testing. The portable gas detector alarm on different sub-control components can then be used to calibrate and test the corresponding gas, eliminating the need to repeatedly replace the portable gas detector alarm. This effectively improves the efficiency of gas calibration, and solves the problem of low efficiency in gas calibration when calibrating for multiple different gases, which previously required repeated replacement of portable gas detector alarms.

[0006] Preferably, the portable gas detectors on the series-connected sub-control components are portable gas detectors for calibrating different gases. By installing portable gas detectors for calibrating different gases on the series-connected sub-control components, when calibrating multiple different gases, the gas enters different sub-control gas path modules through different main control inlets. The opening and closing of the sub-control solenoid valves allows the gas to be calibrated to enter the corresponding portable gas detector for calibration and testing. Furthermore, by utilizing the portable gas detectors on different sub-control housings to calibrate and test the corresponding gases, the types of gases that can be calibrated by the gas calibration device of this application are greatly increased, thereby expanding the applicability of the gas calibration device of this application.

[0007] Preferably, both the main control gas path module and the sub-control gas path module are provided with air vents. One end of the air vent on the main control gas path module is connected to the outside, and the other end is connected to the air vent on the sub-control gas path module. The air vents on adjacent sub-control gas path modules are interconnected. The air vents are designed to clean the gas passage, prevent the residue of standard gas in the gas passage, and enable the portable gas detector alarm to quickly return to zero.

[0008] Preferably, the main control housing is equipped with a pressurization unit, which is connected to the main control gas delivery chamber and the main control unit. The pressurization unit increases the pressure of the gas in the main control gas delivery chamber, thereby increasing the flow rate of the gas to be calibrated and tested in the gas calibration device.

[0009] Preferably, the sub-control housing is equipped with a pressurization unit, which is connected to the sub-control gas delivery chamber and the sub-control unit. The pressurization unit increases the pressure of the gas in the sub-control gas delivery chamber, thereby increasing the flow rate of the gas to be calibrated or tested in the gas calibration device into the portable gas detector alarm.

[0010] Preferably, the pressurization unit is a diaphragm pump. A diaphragm pump (also known as a plug pump) is a positive displacement pump that delivers liquid by changing the volume of the working chamber through the reciprocating deformation of a diaphragm. The diaphragm pump increases the pressure of the gas to be calibrated or tested within the gas calibration device. The diaphragm pump model used in this application can be SP200EC.

[0011] Preferably, the sub-control housing is provided with a fixing groove for engaging the portable gas detector alarm. A cover plate is hinged to the groove wall of the fixing groove. The cover plate is provided with a connecting groove adapted to the detection port of the portable gas detector alarm. The connecting groove has a gas detection inlet and a gas detection outlet. The gas detection inlet communicates with the outlet of the sub-control second gas outlet, and the gas detection outlet is connected to the sub-control exhaust port. A sealing ring is provided on the outside of the connecting groove. The cover plate is provided to both compress the portable gas detector alarm and to form a sealed space between the connecting groove on the cover plate and the portable gas detector alarm, so that the gas to be calibrated or tested entering through the gas detection inlet can enter the portable gas detector alarm for testing. The sealing ring on the outside of the connecting groove further improves the sealing performance of the sealed space formed between the connecting groove on the cover plate and the portable gas detector alarm. After the gas to be calibrated or tested enters the portable gas detector alarm through the gas detection inlet and completes the test, it flows into the gas detection outlet and then into the sub-control exhaust port, and then sequentially into the sub-control exhaust port and the main control exhaust port before flowing out.

[0012] Preferably, a main control solenoid valve is provided between each of the main control air inlets and the main control air delivery chamber. A main control unit is provided on the main control housing, and a sub-control unit is provided on the sub-control housing. The main control unit and the sub-control unit are connected, the main control solenoid valve is connected to the main control unit, and the sub-control solenoid valve is connected to the sub-control unit. The number of main control solenoid valves is the same as the number of main control air inlets, meaning one main control solenoid valve controls the opening and closing of one main control air inlet. At least two of the main control air inlets are connected to external gas cylinders, which store different types of gas. The main control unit controls the opening and closing of the main control solenoid valves on the main control air delivery chamber. When the main control unit controls the main control solenoid valve corresponding to the gas type to open, the other main control solenoid valves are closed, thus enabling the main control unit to control the type of gas flowing out along the main control air outlet.

[0013] Both the main control solenoid valve and the branch control solenoid valve can be model V2-16-4-PV-5F08 or V2-14-1-PV-5F00.

[0014] Preferably, the main control unit includes a main control circuit board running control software, a main control processor mounted on the main control circuit board, and an operation panel and a display screen mounted on the main control housing. The main control processor is connected to the main control solenoid valve, the operation panel, and the display screen. The main control unit includes a main control buzzer and a main control indicator light, both of which are connected to the main control processor. The display screen is an LCD screen, model OPTO1357GFW. The operation panel allows for input of commands such as power-on, power-off, parameter setting, calibration, impact detection, and historical data query for the main control processor. The main control processor displays real-time information on the display screen. The main control processor controls the air path by switching the main control solenoid valve on and off, displays the main control operating status by the main control indicator light, and indicates the main control operating results by the main control buzzer. The main control unit may further include a main control data storage module, a main control clock module, a main control wired communication module, and a main control wireless communication module. The main control data storage module manages historical data, the main control clock module obtains current time information, the main control wired communication module facilitates information exchange with the sub-control units, and the main control wireless communication module enables information exchange between the cloud and the gas calibration device. The main control data storage module can use a Flash memory chip, such as the AT45DB161E-SHD-T; the main control clock module can use a combinational logic real-time clock chip, such as the PCF8563T / 5; and the main control wireless communication module can be a wide-area wireless communication module, such as the EC801E.

[0015] The main control circuit board is equipped with a power module, which has a charging port. The power adapter inputs a 12V DC voltage with a maximum current of 5A to the power module through the charging port. The power module provides power to the entire main control unit and sub-control units.

[0016] Preferably, the sub-control unit includes a sub-control circuit board with a sub-control processor. The portable gas detector and the sub-control solenoid valve are connected to the sub-control processor, which is connected to the main control processor. The sub-control unit includes a sub-control buzzer and a sub-control indicator light, both of which are connected to the sub-control processor. Gas path control is achieved by switching the sub-control solenoid valve on and off. The sub-control indicator light module displays the sub-control operation status and results, and the sub-control buzzer module indicates the sub-control operation results. The sub-control unit may also include a sub-control wired communication module and a charging module. The sub-control circuit board has a sub-control power interface and a charging module. A 12V DC voltage with a maximum current of 5A from the main control unit is input to the sub-control circuit board through the terminals of the sub-control power interface, providing power to the entire sub-control circuit board. The sub-control processor communicates with the main control unit through the sub-control wired communication module and the main control wired communication module. The charging module enables charging of the portable gas detector.

[0017] The power supply module can use a linear LDO power chip, model SGM2205-ADJ. Both the main control wired communication module and the sub-control wired communication module can use an RS485 communication chip, model ISO3082DWR-T. Both the main control processor and the sub-control processor can use an ultra-low power MSP430 chip, model MSP430F2418TPMR.

[0018] The beneficial effects of this invention are: 1. The main control gas circuit module of this application has at least two main control air inlets connected to its main control gas delivery cavity. These at least two main control air inlets are connected to several sub-control gas circuit modules connected in series. Thus, when calibrating for various gases, the gas enters different sub-control gas circuit modules through different main control air inlets. By opening and closing the sub-control solenoid valves, the gas to be calibrated enters the portable gas detector alarm of the corresponding sub-control component for calibration and testing. The portable gas detector alarms on different sub-control components are used to calibrate and test the corresponding gases, eliminating the need to repeatedly replace the portable gas detector alarms. This effectively improves the efficiency of gas calibration, resulting in relatively high gas calibration efficiency.

[0019] 2. The main control unit of this application may also include a main control data storage module and a main control wireless communication module. The main control data storage module realizes the historical data management function, and the main control wireless communication module realizes the information interaction between the cloud and the gas calibration device, realizing local storage and wireless uploading of data for subsequent traceability. Attached Figure Description

[0020] To more clearly illustrate the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a perspective view of the present invention.

[0022] Figure 2 This is a perspective view of the main control component of the present invention.

[0023] Figure 3 This is a perspective view of the control component of the present invention.

[0024] Figure 4 The three-dimensional representation of the main control air circuit module of the present invention Figure 1 .

[0025] Figure 5 The three-dimensional representation of the main control air circuit module of the present invention Figure 2 .

[0026] Figure 6 The three-dimensional view of the separate control air circuit module of the present invention Figure 1 .

[0027] Figure 7 The three-dimensional view of the separate control air circuit module of the present invention Figure 2 .

[0028] Figure 8 This is a schematic diagram of the cover plate of the present invention.

[0029] Figure 9 This is a schematic diagram of the main control unit of the present invention.

[0030] Figure 10 This is a schematic diagram of the control unit of the present invention.

[0031] In the diagram: 1. Main control component, 2. Sub-control component, 3. Main control housing, 4. Main control gas circuit module, 5. Sub-control housing, 6. Sub-control gas circuit module, 7. Portable gas detector alarm, 8. Main control solenoid valve, 9. Sub-control solenoid valve, 10. Operation panel, 11. Display screen, 12. Cover plate, 13. Connection slot, 14. Main control exhaust port, 15. Main control air inlet, 16. Main control air outlet, 17. Sub-control exhaust port, 18. Sub-control air inlet, 19. Sub-control exhaust port, 20. Gas detection inlet, 21. Gas detection outlet, 22. Air passage, 23. Sub-control solenoid valve mounting position, 24. Main control solenoid valve mounting position, 25. Sub-control first air outlet, 26. Sub-control second air outlet. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Example 1, a gas calibration device, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, the system includes a main control component 1 and several sub-control components 2, which are connected in series and communicate with the main control component 1. The main control component 1 includes a main control housing 3, which houses a main control gas path module 4. The main control gas path module 4 has a main control gas supply chamber, a main control exhaust port 14, a main control air inlet 15, and a main control air outlet 16. The main control air inlet 15 and the main control air outlet 16 are both connected to the main control gas supply chamber, and the main control air outlet 16 is connected to the sub-control components 2. At least two of the main control air inlets 15 are connected to the main control gas supply chamber. The sub-control components 2 include sub-control housings 5, which house sub-control gas path modules 6 and a portable gas detector alarm 7 for gas calibration. The sub-controlled air circuit module 6 is provided with a sub-controlled exhaust port 17, a sub-controlled air inlet 18, a sub-controlled exhaust port 19, a sub-controlled first air outlet 25, and a sub-controlled second air outlet 26. A sub-controlled solenoid valve 9 is provided on the channel of the sub-controlled air inlet 18. The air outlet of the sub-controlled solenoid valve 9 is connected to the sub-controlled first air outlet 25 and the sub-controlled second air outlet 26 respectively. When the sub-controlled solenoid valve 9 is activated, the air outlet of the sub-controlled solenoid valve 9 is connected to the sub-controlled second air outlet 26, and the air outlet of the sub-controlled solenoid valve 9 is closed to the sub-controlled first air outlet 25. When the sub-controlled solenoid valve 9 is closed, the air outlet of the sub-controlled solenoid valve 9 is connected to the sub-controlled first air outlet 25, and the air outlet of the sub-controlled solenoid valve 9 is closed to the sub-controlled second air outlet 26. The main control air outlet 16 is connected to the sub-control air inlet 18, the main control exhaust port 14 is connected to the sub-control exhaust port 19, the sub-control second air outlet 26 is connected to the air inlet of the portable gas detector alarm 7, the air outlet of the portable gas detector alarm 7 is connected to the sub-control exhaust port 17, and the sub-control first air outlet 25 is connected to the sub-control air inlet 18 of the adjacent sub-control gas circuit module 6. At least two main control air inlets 15 are connected to the main control air supply cavity of the main control gas circuit module 4 of this application. The at least two main control air inlets 15 are connected to a plurality of sub-control gas circuit modules 6 connected in series. Thus, when calibrating for multiple different gases, the gas enters into different sub-control gas circuit modules 6 through different main control air inlets 15. The opening and closing of the sub-control solenoid valve 9 allows the gas to be calibrated to enter the portable gas detector 7 of the corresponding sub-control component 2 for calibration and testing. Thus, the portable gas detector 7 on different sub-control components 2 is used to calibrate and test the corresponding gas, eliminating the need to repeatedly replace the portable gas detector 7. This effectively improves the efficiency of gas calibration and solves the problem of low efficiency in gas calibration when calibrating for multiple different gases, which previously required repeated replacement of the portable gas detector 7.

[0034] The main control housing 3 and the sub-control housing 5 are fixedly connected by screws, and two adjacent sub-control housings 5 ​​are also fixedly connected by screws.

[0035] The sub-control air circuit module 6 is provided with a sub-control solenoid valve mounting position 23. The sub-control solenoid valve 9 is fixedly installed on the sub-control solenoid valve mounting position 23 on the sub-control air circuit module 6, so that when the sub-control solenoid valve 9 is started, the air outlet end of the sub-control solenoid valve 9 is connected to the sub-control second air outlet 26 and closed to the sub-control first air outlet 25; when the sub-control solenoid valve 9 is closed, the air outlet end of the sub-control solenoid valve 9 is connected to the sub-control first air outlet 25 and closed to the sub-control second air outlet 26.

[0036] Example 2, based on Example 1, provides a gas calibration device, such as... Figure 1 and Figure 3 As shown, the portable gas detectors 7 on the series-connected sub-control components 2 are used for calibrating different gases. By installing these portable gas detectors on the series-connected sub-control components 2, different gases are introduced into different sub-control gas path modules 6 through different main control inlets 15 during calibration. The opening and closing of the sub-control solenoid valves 9 allows the gas to be calibrated to enter the corresponding portable gas detector 7 for calibration and testing. Furthermore, the portable gas detectors 7 on different sub-control housings 5 ​​are used to calibrate and test the corresponding gases, greatly increasing the types of gases that the gas calibration device of this application can calibrate, thereby expanding the applicability of the gas calibration device of this application.

[0037] Example 3, based on Example 2, provides a gas calibration device, such as... Figure 5 , Figure 6 and Figure 7 As shown, both the main control gas path module 4 and the sub-control gas path module 6 are equipped with air vents 22. One end of the air vent 22 on the main control gas path module 4 is connected to the outside, and the other end is connected to the air vent 22 on the sub-control gas path module 6. The air vents 22 on adjacent sub-control gas path modules 6 are interconnected. The air vents 22 are designed to clean the gas passage, prevent the residue of standard gas in the gas passage, and enable the portable gas detector alarm 7 to quickly return to zero.

[0038] Example 4, based on Example 3, provides a gas calibration device, such as... Figure 1 and Figure 9 As shown, a pressurization unit is provided inside the main control housing 3. The pressurization unit is connected to the main control gas delivery chamber and the main control unit. The pressurization unit increases the pressure of the gas inside the main control gas delivery chamber, thereby increasing the flow rate of the gas to be calibrated and tested in the gas calibration device.

[0039] Example 5, based on Example 3, provides a gas calibration device, such as... Figure 1As shown, a pressurization unit is provided inside the sub-control housing 5. The pressurization unit is connected to the sub-control gas delivery chamber and the sub-control unit. The pressurization unit increases the pressure of the gas in the sub-control gas delivery chamber, thereby increasing the flow rate of the gas to be calibrated and tested in the gas calibration device into the portable gas detector alarm 7.

[0040] Example 6, based on Example 4 or 5, a gas calibration device, such as... Figure 1 As shown, the pressurization unit is a diaphragm pump. A diaphragm pump (also known as a plug pump) is a positive displacement pump that delivers liquid by changing the volume of the working chamber through the reciprocating deformation of a diaphragm. The diaphragm pump increases the pressure of the gas to be calibrated or tested within the gas calibration device. The diaphragm pump model used in this application can be SP200EC.

[0041] Example 7, based on Example 6, provides a gas calibration device, such as... Figure 1 , Figure 2 and Figure 8 As shown, the sub-control housing 5 is provided with a fixing groove for engaging the portable gas detector alarm 7. A cover plate 12 is hinged to the groove wall. The cover plate 12 is provided with a connecting groove 13 adapted to the detection port of the portable gas detector alarm 7. The connecting groove 13 is provided with a gas detection inlet 20 and a gas detection outlet 21. The gas detection inlet 20 is connected to the outlet of the sub-control second gas outlet 26, and the gas detection outlet 21 is connected to the sub-control exhaust port 17. A sealing ring is provided on the outside of the connecting groove 13. The cover plate 12 is provided to both press the portable gas detector alarm 7 tightly and to form a sealed space between the connecting groove 13 on the cover plate 12 and the portable gas detector alarm 7, so that the gas to be calibrated or tested entering through the gas detection inlet 20 can enter the portable gas detector alarm 7 for detection. The sealing ring on the outside of the connecting groove 13 further improves the sealing performance of the sealed space formed between the connecting groove 13 on the cover plate 12 and the portable gas detector alarm 7. When the gas to be calibrated and tested enters the portable gas detector alarm 7 through the gas detection inlet 20 and completes the detection, it flows into the gas detection outlet 21 and into the sub-control exhaust port 17, and then flows out through the sub-control exhaust port 19 and the main control exhaust port 14 in sequence.

[0042] Example 8, based on Example 7, provides a gas calibration device, such as... Figure 1 , Figure 2 and Figure 9As shown, a main control solenoid valve 8 is provided between each of the main control air inlet 15 and the main control air delivery chamber. A main control unit is provided on the main control housing 3, and a sub-control unit is provided on the sub-control housing 5. The main control unit and the sub-control unit are connected. The main control solenoid valve 8 is connected to the main control unit, and the sub-control solenoid valve 9 is connected to the sub-control unit. The number of main control solenoid valves 8 is the same as the number of main control air inlets 15, that is, one main control solenoid valve 8 controls the opening and closing of one main control air inlet 15. At least two of the main control air inlets 15 are connected to external gas cylinders, which store different types of gases. The main control unit controls the opening and closing of the main control solenoid valves 8 on the main control air delivery chamber. When the main control unit controls the main control solenoid valve 8 corresponding to the gas type to open, the other main control solenoid valves 8 are in the closed state, thereby enabling the main control unit to control the type of gas flowing out along the main control air outlet 16.

[0043] The main control air circuit module 4 is equipped with a main control solenoid valve mounting position 24. The main control solenoid valve 8 can be fixedly installed on the main control solenoid valve mounting position 24 of the main control air circuit module 4, thereby controlling the connection or blockage between the main control air inlet 15 and the main control air delivery chamber. When the main control solenoid valve 8 is activated, the main control air inlet 15 is connected to the main control air delivery chamber; when the main control solenoid valve 8 is closed, the main control air inlet 15 is blocked from the main control air delivery chamber. One main control air inlet 15 corresponds to one main control solenoid valve 8.

[0044] Both the main control solenoid valve 8 and the sub-control solenoid valve 9 can be model V2-16-4-PV-5F08 or V2-14-1-PV-5F00.

[0045] Example 9, based on Example 8, provides a gas calibration device, such as... Figure 1 , Figure 2 and Figure 9As shown, the main control unit includes a main control circuit board running control software, a main control processor on the main control circuit board, and an operation panel 10 and a display screen 11 on the main control housing 3. The main control processor is connected to the main control solenoid valve 8, the operation panel 10, and the display screen 11. The main control unit includes a main control buzzer and a main control indicator light, both of which are connected to the main control processor. The display screen 11 is an LCD screen, model OPTO1357GFW. The operation panel 10 is used to input commands for powering on / off, setting parameters, calibrating, impact detection, and querying historical data of the main control processor. The main control processor displays these commands in real time on the display screen 11. The main control processor controls the air path by switching the main control solenoid valve 8, displays the operating status of the main control unit by the main control indicator light, and indicates the operating results of the main control unit by the main control buzzer. The main control unit may further include a main control data storage module, a main control clock module, a main control wired communication module, and a main control wireless communication module. The main control data storage module manages historical data, the main control clock module obtains current time information, the main control wired communication module facilitates information exchange with the sub-control units, and the main control wireless communication module enables information exchange between the cloud and the gas calibration device. The main control data storage module can use a Flash memory chip, such as the AT45DB161E-SHD-T; the main control clock module can use a combinational logic real-time clock chip, such as the PCF8563T / 5; and the main control wireless communication module can be a wide-area wireless communication module, such as the EC801E.

[0046] The main control circuit board is equipped with a power module, which has a charging port. The power adapter inputs a 12V DC voltage with a maximum current of 5A to the power module through the charging port. The power module provides power to the entire main control unit and sub-control units.

[0047] Example 10, based on Example 9, provides a gas calibration device, such as... Figure 1 , Figure 2 and Figure 10As shown, the sub-control unit includes a sub-control circuit board with a sub-control processor. The portable gas detector alarm 7 and the sub-control solenoid valve 9 are connected to the sub-control processor, which is connected to the main control processor. The sub-control unit includes a sub-control buzzer and a sub-control indicator light, both of which are connected to the sub-control processor. Gas path control is achieved by switching the sub-control solenoid valve 9. The sub-control indicator light module displays the sub-control operation status and results, and the sub-control buzzer module indicates the sub-control operation results. The sub-control unit may also include a sub-control wired communication module and a charging module. The sub-control circuit board has a sub-control power interface and a charging module. A 12V DC voltage with a maximum current of 5A from the main control unit is input to the sub-control circuit board through the terminals of the sub-control power interface, providing power to the entire sub-control circuit board. The sub-control processor communicates with the main control unit through the sub-control wired communication module and the main control wired communication module. The charging module enables charging of the portable gas detector alarm 7.

[0048] The power supply module can use a linear LDO power chip, model SGM2205-ADJ. Both the main control wired communication module and the sub-control wired communication module can use an RS485 communication chip, model ISO3082DWR-T. Both the main control processor and the sub-control processor can use an ultra-low power MSP430 chip, model MSP430F2418TPMR.

[0049] In Example 10, the main control housing 3 and the sub-control housing 5 are fixedly connected by screws. Adjacent sub-control housings 5 ​​are also fixedly connected by screws. The main control gas path module 4, main control circuit board, operation panel 10, and display screen 11 are installed on the main control housing 3. A top cover plate 12 is installed on the sub-control housing 5. The sub-control gas path module 6 is fixedly connected inside the sub-control housing 5. A portable gas detector alarm 7 is installed in the fixing slot of the sub-control housing 5. Then, the main control outlet 16 and the sub-control inlet 18 are connected through a gas pipeline (material: polytetrafluoroethylene). The main control exhaust port 14 and the sub-control exhaust port 19 are connected through a gas pipeline. The second sub-control outlet... The vent 26 is connected to the gas detection inlet 21 of the portable gas detector alarm 7 via a gas supply pipeline. The gas detection outlet 21 of the portable gas detector alarm 7 is connected to the sub-controlled exhaust port 17 via a gas supply pipeline. The sub-controlled first exhaust port 25 is connected to the sub-controlled air inlet 18 of the adjacent sub-controlled gas path module 6 via a gas supply pipeline. One end of the air passage 22 on the main control gas path module 4 is connected to the outside via a gas supply pipeline, and the other end is connected to the air passage 22 on the sub-controlled gas path module 6 via a gas supply pipeline. The air passages 22 on two adjacent sub-controlled gas path modules 6 are connected via a gas supply pipeline, thus completing the gas calibration device of this application.

[0050] The operating steps of the gas calibration device of this application are as follows: Step 1: First, fix several gas cylinders and connect the air inlet of the pressure reducing valve to each gas cylinder. The air outlet of the pressure reducing valve is connected to the corresponding main control air inlet 15 through the gas supply pipe.

[0051] Step 2: Open the cover plate 12, place the portable gas detector 7 into the fixing slot of the sub-control housing 5, and then close the cover plate 12. Use the cover plate 12 to securely fix the portable gas detector 7. At this time, the connecting slot 13 of the cover plate 12 is adapted to the detection port of the portable gas detector 7 to form a sealed space.

[0052] Step 3: Adjust the pressure reducing valves on all gas cylinders to achieve the specified flow rate. Using the operation panel 10 on the main control housing 3, after setting parameters such as the main control air inlet 15's channel opening / closing, gas name, concentration, and unit in the menu, click the "Impact" or "Calibration" button. The "Impact" or "Calibration" indicator light on the corresponding sub-control unit of the portable gas detector alarm 7 will display yellow (indicating operation). When the indicator light changes from yellow to red or green, the corresponding "Impact" or "Calibration" result will be displayed on the operation panel 10 (red indicates failure, green indicates success).

[0053] Taking the gases to be tested as carbon monoxide and methane, with the portable gas detector 7 on the first sub-control component 2 used to detect carbon monoxide and the portable gas detector 7 on the third sub-control component 2 used to detect methane as an example, the main control processor controls the opening or closing of the corresponding main control solenoid valves 8, with the main control solenoid valves 8 corresponding to carbon monoxide and methane being open, and the other main control solenoid valves 8 being closed. At this time, the sub-control solenoid valves 9 on the first and third sub-control gas circuit modules 6 are open, while the sub-control solenoid valves 9 on the other sub-control gas circuit modules 6 are closed. Carbon monoxide and methane enter the sub-control inlet 18 on the first sub-control gas circuit module 6 through the main control outlet 16. At this time, the sub-control solenoid valve 9 on the first sub-control gas circuit module 6 is activated, and carbon monoxide and methane enter the gas detection inlet 20 of the first sub-control gas circuit module 6 through the sub-control second outlet 26. Meanwhile, the sub-control solenoid valve 9 on the second sub-control gas circuit module 6 will close, causing the sub-control second outlet 26 on the second sub-control gas circuit module 6 to close. At this time, carbon monoxide and methane will enter through the gas delivery pipe of the second sub-control gas circuit module 6, enter through the sub-control inlet 18 on the second sub-control gas circuit module 6, and flow out through the sub-control first outlet 25 on the second sub-control gas circuit module 6 to the third sub-control gas circuit. When the sub-controlled air inlet 18 on module 6 is activated, the sub-controlled solenoid valve 9 on the third sub-controlled gas circuit module 6 is activated. Carbon monoxide and methane enter the gas detection inlet 20 of the third sub-controlled gas circuit module 6 through the sub-controlled second air outlet 26. After carbon monoxide and methane enter the gas detection inlets 20 of the first and third sub-controlled gas circuit modules 6, the main control processor will control the corresponding portable gas detection alarm 7 to perform carbon monoxide and methane calibration and detection. After the detection is completed, the carbon monoxide and methane will enter the sub-controlled exhaust port 17 on the first and third sub-controlled gas circuit modules 6 and the gas transmission pipeline, and then enter the sub-controlled exhaust port 19 on the first and third sub-controlled gas circuit modules 6. Finally, they will flow into the main control exhaust port 14 of the main control gas circuit module 4 through the gas transmission pipeline and be discharged from the gas calibration device.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A gas calibration device, characterized in that, The system includes a main control component (1) and several sub-control components (2), which are connected in series and communicate with the main control component (1). The main control component (1) includes a main control housing (3), which contains a main control gas path module (4). The main control gas path module (4) has a main control gas supply chamber, a main control exhaust port (14), a main control air inlet (15), and a main control air outlet (16). The main control air inlet (15) and the main control air outlet (16) are both connected to the main control gas supply chamber, and the main control air outlet (16) is connected to the sub-control components (2). At least two of the main control air inlets (15) are connected to the main control gas supply chamber. The sub-control components (2) include a sub-control housing (5), which has a sub-control gas path module (6) and a portable gas detector alarm (7) for gas calibration. The sub-control gas circuit module (6) is provided with a sub-control exhaust port (17), a sub-control air inlet (18), a sub-control exhaust port (19), a sub-control first air outlet (25), and a sub-control second air outlet (26). The sub-control air inlet (18) is provided with a sub-control solenoid valve (9). The air outlet of the sub-control solenoid valve (9) is connected to the sub-control first air outlet (25) and the sub-control second air outlet (26) respectively. The main control air outlet (16) is connected to the sub-control air inlet (18). The main control exhaust port (14) is connected to the sub-control exhaust port (19). The sub-control second air outlet (26) is connected to the air inlet of the portable gas detector (7). The air outlet of the portable gas detector (7) is connected to the sub-control exhaust port (17). The sub-control first air outlet (25) is connected to the sub-control air inlet (18) of the adjacent sub-control gas circuit module (6).

2. The gas calibration device according to claim 1, characterized in that: The portable gas detectors (7) on the series-connected sub-control components (2) are portable gas detectors used to calibrate different gases.

3. The gas calibration device according to claim 2, characterized in that: Both the main control air circuit module (4) and the sub-control air circuit module (6) are provided with air passage holes (22). One end of the air passage hole (22) on the main control air circuit module (4) is connected to the outside, and the other end is connected to the air passage hole (22) on the sub-control air circuit module (6). The air passage holes (22) on two adjacent sub-control air circuit modules (6) are connected to each other.

4. The gas calibration device according to claim 3, characterized in that: The main control housing (3) is equipped with a booster unit, which is connected to the main control air delivery chamber and the main control unit.

5. The gas calibration device according to claim 3, characterized in that: The sub-control housing (5) is equipped with a pressurization unit, which is connected to the sub-control air delivery chamber and the sub-control unit.

6. The gas calibration device according to claim 4 or 5, characterized in that: The booster unit is a diaphragm pump.

7. The gas calibration device according to claim 6, characterized in that: The sub-control housing (5) is provided with a fixing groove for snapping on the portable gas detector alarm (7). A cover plate (12) is hinged to the groove wall of the fixing groove. The cover plate (12) is provided with a connecting groove (13) that is adapted to the detection port of the portable gas detector alarm (7). The connecting groove (13) is provided with a gas detection inlet (20) and a gas detection outlet (21). The gas detection inlet (20) is connected to the outlet of the sub-control second gas outlet (26), and the gas detection outlet (21) is connected to the sub-control exhaust port (17). A sealing ring is provided on the outside of the connecting groove (13).

8. The gas calibration device according to claim 7, characterized in that: A main control solenoid valve (8) is provided between any of the main control air inlet (15) and the main control air delivery chamber. A main control unit is provided on the main control housing (3), and a sub-control unit is provided on the sub-control housing (5). The main control unit and the sub-control unit are connected. The main control solenoid valve (8) is connected to the main control unit, and the sub-control solenoid valve (9) is connected to the sub-control unit.

9. The gas calibration device according to claim 8, characterized in that: The main control unit includes a main control circuit board running control software, a main control processor is provided on the main control circuit board, and an operation panel (10) and a display screen (11) are provided on the main control housing (3). The main control processor is connected to the main control solenoid valve (8), the operation panel (10) and the display screen (11) respectively. The main control unit includes a main control buzzer and a main control indicator light, and the main control buzzer and the main control indicator light are both connected to the main control processor respectively.

10. The gas calibration device according to claim 9, characterized in that: The sub-control unit includes a sub-control circuit board, on which a sub-control processor is provided. The portable gas detector alarm (7) and the sub-control solenoid valve (9) are respectively connected to the sub-control processor, and the sub-control processor is connected to the main control processor. The sub-control unit includes a sub-control buzzer and a sub-control indicator light, and the sub-control buzzer and the sub-control indicator light are respectively connected to the sub-control processor.

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