A high-efficiency multi-channel combustible gas sensor calibration device

Abstract

This utility model relates to the field of combustible gas sensor calibration, specifically to a high-efficiency multi-channel combustible gas sensor calibration device. It comprises a cabinet assembly, a calibration assembly, a first gas supply assembly, and a second gas supply assembly; the calibration assembly, the first gas supply assembly, and the second gas supply assembly are respectively connected to the cabinet assembly; the first gas supply assembly and the second gas supply assembly are respectively connected to the calibration assembly; the first gas supply assembly and the second gas supply assembly are in communication. This solves the problem of slow calibration efficiency in existing combustible gas sensor calibration devices.

Description

Technical Field

[0001] This utility model relates to the field of combustible gas sensor calibration, and more specifically to a high-efficiency multi-channel combustible gas sensor calibration device. Background Technology

[0002] Combustible gas sensors, also known as gas leak detection and alarm instruments, are used in industrial and daily life environments (such as kitchens using natural gas) to detect leaks of flammable gases. When the concentration of the flammable gas reaches the set alarm value, the gas alarm will emit an audible and visual alarm signal. The gas alarm can also be linked to related equipment. For example, in the event of a leak during factory production or storage, it can activate ventilation, power cut-off, and sprinkler systems to prevent explosions, fires, and poisoning accidents, thereby ensuring safe production. Therefore, the normal operation of flammable gas sensors is crucial for ensuring safe living and production. Most existing flammable gas sensors undergo quality testing before leaving the factory to ensure they meet standards; only qualified sensors are released to the market. However, many existing flammable gas sensor testing devices use a single channel to deliver testing gas to the sensor. While this method can achieve testing, it is generally inefficient. Utility Model Content

[0003] To address the problem of slow testing efficiency in existing combustible gas sensor testing devices, this utility model provides:

[0004] The system includes a cabinet assembly, a calibration assembly, a first gas supply assembly, and a second gas supply assembly; the calibration assembly, the first gas supply assembly, and the second gas supply assembly are respectively connected to the cabinet assembly; the first gas supply assembly and the second gas supply assembly are respectively connected to the calibration assembly; the first gas supply assembly and the second gas supply assembly are in communication.

[0005] In some embodiments, the first gas delivery assembly includes a standard gas cylinder, a first gas main, a plurality of first gas branch pipes, and a plurality of first one-way valves; the standard gas cylinder is connected to the first gas main; the first gas branch pipes are respectively connected to the first gas main to form gas channels; the first one-way valves are connected to the first gas branch pipes one by one; and the first gas branch pipes are respectively connected to the calibration assembly.

[0006] In some embodiments, the second gas delivery assembly includes a zero-point gas cylinder, a second gas main, a plurality of second gas branch pipes, and a plurality of second one-way valves; the zero-point gas cylinder is connected to the second gas main; the second gas branch pipes are connected to the second gas main to form a gas channel, and the other end is connected to the first gas branch pipe; the first one-way valve is located between the second gas branch pipes and the first gas main; the second one-way valves are connected to the second gas branch pipes in a one-to-one correspondence; the second gas main is connected to a calibration assembly.

[0007] In some embodiments, the calibration assembly includes a controller, a fan, multiple switches, multiple first solenoid valves, a second solenoid valve, and multiple gas flow sensors located within the cabinet assembly, and a control panel located outside the cabinet assembly; the fan is connected to the cabinet assembly; the control panel is connected to the cabinet assembly; the first solenoid valves are connected to the first gas supply branch pipes in a one-to-one correspondence; the gas flow sensors are connected to the first gas supply branch pipes in a one-to-one correspondence; the second solenoid valves are connected to the second gas supply main pipe; the fan, the switches, the first solenoid valves, the second solenoid valves, the gas flow sensors, and the control panel are all electrically connected to the controller.

[0008] In some embodiments, the verification component further includes a camera; the camera is connected to the cabinet component and electrically connected to the controller.

[0009] In some embodiments, the cabinet assembly includes a cabinet module, a door module, and an exhaust pipe; a cavity is formed inside the cabinet module; the controller, the fan, the plurality of switches, the first solenoid valve, the second solenoid valve, the gas flow sensor, the camera, the standard gas cylinder, the first main gas supply pipe, the first branch gas supply pipe, the first one-way valve, the zero-point gas cylinder, the second main gas supply pipe, the second branch gas supply pipe, and the second one-way valve are all located within the cavity; the door module is movably connected to the cabinet module; the door module is used to close and open the cavity; the exhaust pipe is connected to the cabinet module; and the camera is connected to the cabinet module.

[0010] In some embodiments, the cabinet module includes a cabinet body and a first chamber, a second chamber, a third chamber, and a fourth chamber located within the cabinet body, separated by partitions; the standard gas cylinder, the first main gas supply pipe, the first one-way valve, the zero-point gas cylinder, the second main gas supply pipe, the second branch gas supply pipe, the second one-way valve, the first solenoid valve, the second solenoid valve, and the gas flow sensor are located in the second chamber; one end of the first branch gas supply pipe is located in the second chamber, and the other end is located in the first chamber; the switch and the camera are located in the first chamber; the fan is located in the third chamber; the controller is located in the fourth chamber; the exhaust pipe passes through the cabinet body and communicates with the third chamber; the control panel is connected to the cabinet body; the door module is movably connected to the cabinet body; and the camera is connected to the cabinet body and located above the first chamber.

[0011] In some embodiments, the cabinet assembly further includes multiple sets of slide rail modules; the slide rail modules are fixedly connected to the partitions inside the cabinet body; the slide rail modules are located in the first chamber and the second chamber; the door module is slidably connected to the slide rail modules.

[0012] In some embodiments, the door module includes a first door, a second door, a third door, a fourth door, and a fifth door; the first door and the second door are slidably connected to a slide rail module inside the first cavity; the height of the first door and the height of the second door are less than or equal to the height of the first cavity, and the sum of the lengths of the first door and the second door is greater than the length of the first cavity; the third door and the fourth door are slidably connected to a slide rail module inside the second cavity; the height of the third door and the height of the fourth door are less than or equal to the height of the second cavity, and the sum of the lengths of the third door and the fourth door is greater than the length of the second cavity; the fifth door is screwed to the cabinet body to close the third cavity and the fourth cavity.

[0013] In some embodiments, the first door body is provided with sealing strips at both ends along its length; the second door body is provided with sealing strips at both ends along its length.

[0014] To address the problem of slow testing efficiency in existing combustible gas sensor testing devices, this invention has the following advantages:

[0015] By connecting the calibration component, the first gas supply component, and the second gas supply component to the cabinet component and placing them inside the cabinet component, the first gas supply component and the second gas supply component are respectively connected to the calibration component. The first gas supply component and the second gas supply component are connected. By controlling the second gas supply component to output clean nitrogen through the calibration component, the combustible gas sensor can be calibrated. By controlling the first gas supply component to output combustible gas, the monitoring capability of the sensor can be verified. Furthermore, the first gas supply component and the second gas supply component are designed with multiple channels, which can verify multiple combustible gas sensors at the same time, which can greatly increase the verification efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the planar structure of a high-efficiency multi-channel combustible gas sensor calibration device;

[0017] Figure 2 This is a perspective view of a high-efficiency multi-channel combustible gas sensor calibration device in some embodiments;

[0018] Figure 3 This is a perspective view of a high-efficiency multi-channel combustible gas sensor calibration device in some embodiments;

[0019] Figure 4 This is a schematic diagram of the internal structure of a high-efficiency multi-channel combustible gas sensor calibration device.

[0020] Figure 5 for Figure 4 A magnified view of a portion of point A in the middle.

[0021] In the diagram: 100 - Cabinet assembly; 110 - Cabinet module; 111 - Cabinet body; 112 - First chamber; 113 - Second chamber; 114 - Third chamber; 115 - Fourth chamber; 120 - First door; 130 - Second door; 140 - Third door; 150 - Fourth door; 160 - Fifth door; 170 - Slide rail module; 180 - Exhaust pipe; 200 - Calibration assembly; 210 - Controller; 220 - Control panel; 230 - Fan; 2 40-Combustible gas sensor; 250-Switch; 260-First solenoid valve; 270-Second solenoid valve; 280-Gas flow sensor; 290-Camera; 300-First gas delivery assembly; 310-Standard gas cylinder; 320-First main gas delivery pipe; 330-First branch gas delivery pipe; 340-First check valve; 400-Second gas delivery assembly; 410-Zero point gas cylinder; 420-Second main gas delivery pipe; 430-Second branch gas delivery pipe; 440-Second check valve. Detailed Implementation

[0022] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, and are not intended to imply any limitation on the scope of the disclosure.

[0023] As used herein, the term "comprising" and its variations are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "at least partially based on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments and are not intended to limit the indicated devices, elements, or components to having a specific orientation or being constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientations or positional relationships; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances. In addition, the terms "installed", "set up", "equipped with", "connected", and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Furthermore, the terms "first," "second," etc., are mainly used to distinguish different devices, elements, or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0024] This embodiment discloses a high-efficiency multi-channel combustible gas sensor 240 calibration device, such as... Figure 4 , Figure 5 As shown, it may include:

[0025] The system includes a cabinet assembly 100, a calibration assembly 200, a first gas supply assembly 300, and a second gas supply assembly 400. The calibration assembly 200, the first gas supply assembly 300, and the second gas supply assembly 400 are respectively connected to the cabinet assembly 100. The first gas supply assembly 300 and the second gas supply assembly 400 are respectively connected to the calibration assembly 200. The first gas supply assembly 300 and the second gas supply assembly 400 are in communication.

[0026] In this embodiment, the calibration component 200, the first gas supply component 300, and the second gas supply component 400 are respectively connected to the cabinet component 100 and disposed within the cabinet component 100. The first gas supply component 300 and the second gas supply component 400 are respectively connected to the calibration component 200. The first gas supply component 300 and the second gas supply component 400 are connected. By controlling the second gas supply component 400 to output clean nitrogen through the calibration component 200, the combustible gas sensor 240 can be calibrated. By controlling the first gas supply component 300 to output combustible gas, the monitoring capability of the sensor can be verified. Furthermore, the first gas supply component 300 and the second gas supply component 400 are designed with multiple channels, which can simultaneously verify multiple combustible gas sensors 240, greatly increasing the verification efficiency.

[0027] In some embodiments of this utility model, such as Figure 4 , Figure 5 As shown, the first gas delivery assembly 300 includes a standard gas cylinder 310, a first gas delivery main pipe 320, a plurality of first gas delivery branch pipes, and a plurality of first one-way valves 340; the standard gas cylinder 310 is connected to the first gas delivery main pipe 320; the first gas delivery branch pipes are respectively connected to the first gas delivery main pipe 320 to form gas channels; the first one-way valves 340 are connected to the first gas delivery branch pipes one by one; the first gas delivery branch pipes are respectively connected to the calibration assembly 200.

[0028] In this embodiment, the standard gas cylinder 310 contains the combustible gas (such as natural gas, coal gas, etc.) to be tested. After passing through the first gas main pipe 320, the combustible gas can enter the first gas branch pipes. Since the first one-way valve 340 is provided on the first gas branch pipe, the gas in the second gas delivery assembly 400 will not enter the standard gas cylinder 310 and cause contamination to the combustible gas in the standard gas cylinder 310. The first gas branch pipe can be opened and closed by the calibration assembly 200, and the gas flow rate in the first gas branch pipe can be measured, thereby enabling the output of a fixed amount of combustible gas.

[0029] In some embodiments, such as Figure 4 , Figure 5As shown, the second gas supply assembly 400 includes a zero-point gas cylinder 410, a second gas supply main 420, multiple second gas supply branch pipes 430, and multiple second one-way valves 440; the zero-point gas cylinder 410 is connected to the second gas supply main 420; the second gas supply branch pipes 430 are connected to the second gas supply main 420 to form a gas channel, and the other end is connected to the first gas supply branch pipe; the first one-way valve 340 is located between the second gas supply branch pipes 430 and the first gas supply main 320; the second one-way valves 440 are connected to the second gas supply branch pipes 430 in a one-to-one correspondence; the second gas supply main 420 is connected to the calibration assembly 200.

[0030] In this embodiment, the zero-point gas cylinder 410 contains a calibration gas (e.g., nitrogen). A second gas supply branch pipe 430 is connected to the first gas supply branch pipe, and a second one-way valve 440 is installed on the second gas supply branch pipe 430. The second gas supply main pipe 420 is connected to the calibration component 200. The calibration component 200 can supply the calibration gas into the second gas supply branch pipe 430 by opening the second gas supply main pipe 420. The second gas supply branch pipe 430 can then deliver the calibration gas. The gas enters the first gas supply branch pipe, and the positional relationship between the second gas supply branch pipe 430 and the connection point of the first gas supply branch pipe, the first one-way valve 340, and the first gas supply main pipe 320 is such that the first one-way valve 340 is located between the connection point and the first gas supply main pipe 320; thus, the calibration gas will not enter the calibration gas cylinder 310 through the first gas supply main pipe 320, and since the second gas supply branch pipe 430 is equipped with the second one-way valve 440, the combustible gas will not enter the zero point gas cylinder 410.

[0031] In some embodiments of this utility model, such as Figure 4 , Figure 5 As shown, the calibration component 200 includes a controller 210, a fan 230, multiple switches 250, multiple first solenoid valves 260, second solenoid valves 270, multiple gas flow sensors 280 located within the cabinet component 100, and a control panel 220 located outside the cabinet component 100. The fan 230 is connected to the cabinet component 100; the control panel 220 is connected to the cabinet component 100; the first solenoid valves 260 are connected to the first gas supply branch pipes one by one; the gas flow sensors 280 are connected to the first gas supply branch pipes one by one; the second solenoid valves 270 are connected to the second gas supply main pipe 420; the fan 230, the switches 250, the first solenoid valves 260, the second solenoid valves 270, the gas flow sensors 280, and the control panel 220 are all electrically connected to the controller 210.

[0032] In this embodiment, the controller 210 can be a PLC controller 210. The controller 210 is electrically connected to an external power source. The controller 210 can control the operation of the fan 230, the first solenoid valve 260, and the second solenoid valve 270, energize the switch 250, receive combustible gas flow signal data uploaded by the gas flow sensor 280, and achieve human-machine interaction and display relevant data through electrical connection with the control panel 220. In this embodiment, by electrically connecting the combustible gas sensor 240 to the switch 250 (preferably an explosion-proof switch 250), the combustible gas sensor 240 is energized, thereby enabling the combustible gas sensor 240 to operate normally. The first gas distribution pipe 240 is connected to the end of the first gas distribution pipe away from the first gas main pipe 320, and the second solenoid valve 270 is opened by the controller 210 to output calibration gas to the combustible gas sensor 240 for calibration. After calibration, the controller 210 is operated by the control panel 220 to close the second solenoid valve 270 to cut off the gas used for calibration, and the blower 230 and the first solenoid valve 260 are turned on. The combustible gas in the calibration gas cylinder 310 reaches the combustible gas sensor 240 through the first gas distribution pipe. The combustible gas sensor 240 detects the combustible gas, and the compliance of the combustible gas sensor 240 is determined by judging the response status of the combustible gas sensor 240 within a predetermined time. In this embodiment, the concentration of the combustible gas can be preset and filled into the calibration gas cylinder 310. It is conceivable that in order to quickly calibrate the combustible gas sensor 240 under different concentrations of combustible gas, a combustible gas sensor 240 calibration device with different concentrations of combustible gas can be used for calibration. In some other embodiments, calibrated bottles of combustible gas of different concentrations (not shown in the figure) can be set in a combustible gas sensor 240 calibration device, and the opening or closing of the first solenoid valve 260 (pre-marked to the controller 210) corresponding to different calibration bottles can be controlled by the controller 210 to realize the introduction of combustible gas of corresponding concentration into the combustible gas sensor 240.

[0033] In some embodiments of this utility model, such as Figure 4 , Figure 5 As shown, the verification component 200 also includes a camera 290; the camera 290 is connected to the cabinet component 100 and electrically connected to the controller 210.

[0034] In this embodiment, the video data captured by the camera 290 can be uploaded to the control panel 220, so that the operator can observe the verification situation more intuitively.

[0035] In some embodiments of this utility model, such as Figure 1 , Figure 2, Figure 3 , Figure 4 As shown, the cabinet assembly 100 includes a cabinet module 110, a door module, and an exhaust pipe 180. The cabinet module 110 has an internal cavity. The controller 210, the fan 230, the multiple switches 250, the first solenoid valve 260, the second solenoid valve 270, the gas flow sensor 280, the camera 290, the standard gas cylinder 310, the first main gas pipe 320, the first branch gas pipe, the first one-way valve 340, the zero-point gas cylinder 410, the second main gas pipe 420, the second branch gas pipe 430, and the second one-way valve 440 are all located within the cavity. The door module is movably connected to the cabinet module 110. The door module is used to close and open the cavity. The exhaust pipe 180 is connected to the cabinet module 110. The camera 290 is connected to the cabinet module 110.

[0036] The cabinet module 110 includes a cabinet body 111, and a first chamber 112, a second chamber 113, a third chamber 114, and a fourth chamber 115 located within the cabinet body 111, separated by partitions. The standard gas cylinder 310, the first main gas pipe 320, the first one-way valve 340, the zero-point gas cylinder 410, the second main gas pipe 420, the second branch gas pipe 430, the second one-way valve 440, the first solenoid valve 260, the second solenoid valve 270, and the gas flow sensor 280 are located within the second chamber 113. One end of the first branch gas pipe is... The second chamber 113 is located at one end, and the other end is located in the first chamber 112; the switch 250 and the camera 290 are located in the first chamber 112; the fan 230 is located in the third chamber 114; the controller 210 is located in the fourth chamber 115; the exhaust pipe 180 passes through the cabinet body 111 and communicates with the third chamber 114; the control panel 220 is connected to the cabinet body 111; the door module is movably connected to the cabinet body 111; the camera 290 is connected to the cabinet body 111 and is located above the first chamber 112.

[0037] The cabinet assembly 100 also includes multiple sets of slide rail modules 170; the slide rail modules 170 are fixedly connected to the partitions inside the cabinet body 111; the slide rail modules 170 are located in the first chamber 112 and the second chamber 113; the door module is slidably connected to the slide rail modules 170.

[0038] The door module includes a first door 120, a second door 130, a third door 140, a fourth door 150, and a fifth door 160. The first door 120 and the second door 130 are slidably connected to the slide rail module 170 in the first chamber 112. The height of the first door 120 and the height of the second door 130 are less than or equal to the height of the first chamber 112, and the sum of the lengths of the first door 120 and the second door 130 is greater than the length of the first chamber 112. The third door 140 and the fourth door 150 are slidably connected to the slide rail module 170 in the second chamber 113, respectively; the height of the third door 140 and the height of the fourth door 150 are less than or equal to the height of the second chamber 113, and the sum of the length of the third door 140 and the length of the fourth door 150 is greater than the length of the second chamber 113; the fifth door 160 is screwed to the cabinet body 111 to close the third chamber 114 and the fourth chamber 115.

[0039] In this embodiment, by providing partitions to isolate the first chamber 112, second chamber 113, third chamber 114, and fourth chamber 115 within the cabinet body 111, and by placing the relevant components of the calibration assembly 200 within the corresponding chambers, the combustible gas can be isolated to a certain extent during the calibration of the combustible gas sensor 240, making the device safer. In this embodiment, the first door 120 and the second door 130 can be made of explosion-proof glass, which facilitates observation of the calibration status of the combustible gas sensor 240 while also providing a certain degree of safety protection. The sliding connection method between the slide rail module 170 and the first door 120, second door 130, third door 140, and fourth door 150 in this embodiment is a sliding connection method known to those skilled in the art and applicable to the scenario in which this embodiment is located.

[0040] In some embodiments of this utility model, the first door body 120 is provided with sealing strips (not shown in the figure) at both ends along its length direction; the second door body 130 is provided with sealing strips at both ends along its length direction.

[0041] As described above, corresponding holes can be made in the partition inside the cabinet body 111 for wiring or for the passage of the first and second gas supply pipes 430. Moreover, the corresponding holes can be sealed to ensure that the calibration chamber has good sealing performance.

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

[0043] Before calibration, the combustible gas sensor 240 is electrically connected to the switch 250, and connected to the end of the first gas supply branch pipe away from the first gas supply main pipe 320. All doors are closed to ensure a good seal inside the cabinet body 111. The controller 210 is activated via the control panel 220 to turn on the fan 230 and energize the switch 250, closing the first solenoid valve 260. Subsequently, the controller 210 controls the opening of the second solenoid valve 270, outputting calibration gas to the combustible gas sensor 240 for calibration. After calibration, the combustible gas sensor 240 is calibrated. The control panel 220 operates the controller 210 to close the second solenoid valve 270 to cut off the gas used for calibration, and opens the first solenoid valve 260 to deliver a predetermined amount of combustible gas from the calibration gas cylinder 310 to the combustible gas sensor 240 through the first gas distribution pipe. The combustible gas sensor 240 detects the combustible gas. By judging the response status of the combustible gas sensor 240 within a predetermined time, it is determined whether the combustible gas sensor 240 is compliant. Throughout the process, the fan 230 can draw the gas in the first chamber 112 from the exhaust pipe 180 to the first chamber 112.

[0044] Those skilled in the art will understand that the above embodiments are specific examples of implementing this disclosure, and in practical applications, various changes can be made in form and detail without departing from the spirit and scope of this disclosure.

Claims

1. A high efficiency multi-channel combustible gas sensor verification device, characterized by, include: The system includes a cabinet assembly, a calibration assembly, a first gas supply assembly, and a second gas supply assembly; the calibration assembly, the first gas supply assembly, and the second gas supply assembly are respectively connected to the cabinet assembly; the first gas supply assembly and the second gas supply assembly are respectively connected to the calibration assembly; the first gas supply assembly and the second gas supply assembly are in communication.

2. The high efficiency multi-channel combustible gas sensor calibration device of claim 1, wherein, The first gas delivery assembly includes a standard gas cylinder, a first gas delivery main pipe, multiple first gas delivery branch pipes, and multiple first one-way valves; the standard gas cylinder is connected to the first gas delivery main pipe; the first gas delivery branch pipes are respectively connected to the first gas delivery main pipe to form gas channels; the first one-way valves are connected to the first gas delivery branch pipes one by one; the first gas delivery branch pipes are respectively connected to the calibration assembly.

3. A high efficiency multi-channel combustible gas sensor calibration device according to claim 2, wherein, The second gas delivery assembly includes a zero-point gas cylinder, a second gas main, multiple second gas branch pipes, and multiple second one-way valves; the zero-point gas cylinder is connected to the second gas main; the second gas branch pipes are connected to the second gas main to form a gas channel, and their other ends are connected to the first gas branch pipe; the first one-way valve is located between the second gas branch pipes and the first gas main; the second one-way valves are connected to the second gas branch pipes in a one-to-one correspondence; the second gas main is connected to a calibration assembly.

4. The high efficiency multi-channel combustible gas sensor calibration device of claim 3, wherein, The calibration assembly includes a controller, a fan, multiple switches, multiple first solenoid valves, a second solenoid valve, and multiple gas flow sensors located within the cabinet assembly, and a control panel located outside the cabinet assembly. The fan is connected to the cabinet assembly; the control panel is connected to the cabinet assembly; the first solenoid valves are connected to the first gas supply branch pipes in a one-to-one correspondence; the gas flow sensors are connected to the first gas supply branch pipes in a one-to-one correspondence; the second solenoid valves are connected to the second gas supply main pipe; the fan, the switches, the first solenoid valves, the second solenoid valves, the gas flow sensors, and the control panel are all electrically connected to the controller.

5. A high efficiency multi-channel combustible gas sensor calibration device according to claim 4, wherein, The verification component also includes a camera; the camera is connected to the cabinet component and electrically connected to the controller.

6. A high efficiency multi-channel combustible gas sensor calibration device according to claim 5, wherein, The cabinet assembly includes a cabinet module, a door module, and an exhaust pipe; the cabinet module has an internal cavity; the controller, the fan, the multiple switches, the first solenoid valve, the second solenoid valve, the gas flow sensor, the camera, the standard gas cylinder, the first main gas supply pipe, the first branch gas supply pipe, the first one-way valve, the zero-point gas cylinder, the second main gas supply pipe, the second branch gas supply pipe, and the second one-way valve are all located within the cavity; the door module is movably connected to the cabinet module; the door module is used to close and open the cavity; the exhaust pipe is connected to the cabinet module; the camera is connected to the cabinet module.

7. A high efficiency multi-channel combustible gas sensor calibration device according to claim 6, wherein, The cabinet module includes a cabinet body and four chambers located within the cabinet body, separated by partitions. The standard gas cylinder, the first main gas pipe, the first one-way valve, the zero-point gas cylinder, the second main gas pipe, the second branch gas pipe, the second one-way valve, the first solenoid valve, the second solenoid valve, and the gas flow sensor are located in the second chamber. One end of the first branch gas pipe is located in the second chamber, and the other end is located in the first chamber. The switch and the camera are located in the first chamber. The fan is located in the third chamber. The controller is located in the fourth chamber. The exhaust pipe passes through the cabinet body and communicates with the third chamber. The control panel is connected to the cabinet body. The door module is movably connected to the cabinet body. The camera is connected to the cabinet body and located above the first chamber.

8. The high efficiency multi-channel combustible gas sensor calibration device of claim 7, wherein, The cabinet assembly also includes multiple sets of slide rail modules; the slide rail modules are fixedly connected to the partitions inside the cabinet body; the slide rail modules are located in the first chamber and the second chamber; the door module is slidably connected to the slide rail modules.

9. A high efficiency multi-channel combustible gas sensor calibration device according to claim 8, wherein, The door module includes a first door, a second door, a third door, a fourth door, and a fifth door. The first and second doors are slidably connected to a slide rail module inside the first cavity. The height of the first and second doors is less than or equal to the height of the first cavity, and the sum of the lengths of the first and second doors is greater than the length of the first cavity. The third and fourth doors are slidably connected to a slide rail module inside the second cavity. The height of the third and fourth doors is less than or equal to the height of the second cavity, and the sum of the lengths of the third and fourth doors is greater than the length of the second cavity. The fifth door is screwed to the cabinet body to seal the third and fourth cavities.

10. The high efficiency multi-channel combustible gas sensor calibration device of claim 9, wherein, The first door body has sealing strips at both ends along its length; the second door body has sealing strips at both ends along its length.

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