A multi-channel gas mixing calibration device

Abstract

This invention proposes a multi-channel gas distribution calibration device, comprising a multi-inlet, one-outlet solenoid valve assembly. The inlets of the solenoid valves in the assembly are each connected to an inlet nozzle via pipelines. The outlets of the solenoid valves are sequentially connected via pipelines to a proportional valve, an orifice flow meter, and a three-way connector. The second port of the three-way connector is connected to a glass rotor flow meter, which is connected to an exhaust gas port. The third port of the three-way connector is connected to an outlet gas port. This invention, by connecting nine standard gas lines and one zero gas line through the multi-inlet, one-outlet solenoid valves, can achieve calibration of one gas at multiple concentrations or nine different gases. It eliminates the need for manual gas cylinder replacement and pipeline switching, enabling rapid gas switching and ensuring no cross-contamination. This significantly reduces the impact of manual intervention and operation time, improving calibration efficiency and reliability.

Description

Technical Field

[0001] This utility model belongs to the field of environmental monitoring equipment, and in particular relates to a multi-channel gas distribution calibration device. Background Technology

[0002] As global environmental regulations become increasingly stringent, the calibration quality requirements for environmental monitoring equipment continue to rise. Currently, the calibration of environmental monitoring equipment requires technicians to manually set up gas lines, sequentially connecting gas cylinders, pressure reducing valves, and the instrument being calibrated. When the instrument needs to be calibrated using multiple different types or concentrations of gases, operators must frequently switch gas cylinders, disassemble and reassemble pipelines, and repeatedly adjust flow rates and parameters. This operating mode has significant drawbacks: multiple manual interventions are prone to calibration deviations due to operational errors or environmental interference, leading to distorted monitoring data; and multi-gas calibration requires repetitive operations, resulting in high time costs. Summary of the Invention

[0003] This invention addresses the cumbersome and inefficient technical problem of relying on manual gas path setup and gas cylinder replacement for the calibration of environmental monitoring equipment. It proposes a multi-channel gas mixing calibration device that can simultaneously connect multiple standard gas paths and one zero gas path, providing multiple gases for the calibration equipment.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A multi-channel gas distribution calibration device includes a multi-inlet, one-outlet solenoid valve group. The inlet ports of the solenoid valves of the solenoid valve group are each connected to an inlet nozzle via pipelines. The outlet ports of the solenoid valves of the solenoid valve group are sequentially connected to a proportional valve, an orifice flow meter, and a three-way connector via pipelines. The second port of the three-way connector is connected to a glass rotor flow meter, the glass rotor flow meter is connected to an exhaust gas port, and the third port of the three-way connector is connected to an outlet gas port.

[0005] Preferably, the solenoid valve assembly includes 6-10 solenoid valve inlets.

[0006] As a preferred option, the system also includes a main control board, with the solenoid valve assembly, proportional valve, and orifice flow meter all electrically connected to the main control board.

[0007] Preferably, the system also includes a housing on which a touchscreen electrically connected to the main control board is mounted.

[0008] Preferably, the solenoid valve inlet, exhaust port, and outlet port of the solenoid valve assembly are all mounted on the housing.

[0009] Preferably, the main control board integrates Wi-Fi and Bluetooth data transmission modules.

[0010] Preferably, the housing is equipped with a USB interface.

[0011] Preferably, the outer casing is provided with heat dissipation holes, and a cooling fan is installed inside the outer casing.

[0012] Preferably, the top of the housing is provided with a handle.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows: This utility model's multi-channel gas mixing calibration device connects to nine standard gas channels and one zero gas channel via a multi-inlet, one-outlet solenoid valve. It can calibrate multiple concentrations of a single gas or nine different gases. No manual gas cylinder replacement or pipeline switching is required, enabling rapid gas switching and ensuring no cross-contamination. This significantly reduces the impact of manual intervention and operation time, improving calibration efficiency and reliability.

[0014] The use of integrated solenoid valves reduces the length of the gas path and the size of the instrument, resulting in a compact structure that facilitates transportation and deployment.

[0015] Equipped with a 485 communication socket and Wi-Fi and Bluetooth data transmission modules, it can receive instructions from the instrument being calibrated and automatically perform flow control, pipeline cleaning, and gas switching. After calibration, it can send local and remote status reminders. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the external structure of the multi-channel gas distribution calibration device of this utility model; Figure 2 This is a schematic diagram of the internal structure of the multi-channel gas distribution calibration device of this utility model; Figure 3 This is a schematic diagram of the pipeline connection principle of the multi-channel gas distribution calibration device of this utility model; In the above figures: 1. Outer shell; 2. Air inlet; 3. Solenoid valve assembly; 4. Solenoid valve inlet; 5. Solenoid valve outlet; 6. Proportional valve; 7. Orifice plate flow meter; 8. Glass rotor flow meter; 9. T-connector; 10. Exhaust gas connector; 11. Outlet gas connector; 12. Handle; 13. Main control board; 14. Cooling fan; 15. USB interface; 16. TF upgrade card; 17. 485 communication socket; 18. Touch screen; 19. Upper shell; 20. Base; 21. Connector panel. Detailed Implementation

[0017] To better understand this utility model, the following detailed description is provided in conjunction with the accompanying drawings and embodiments.

[0018] Example: Figures 1-3 As shown, a multi-channel gas distribution calibration device includes a housing 1, an air inlet 2, a multi-inlet and one-outlet solenoid valve group 3, a proportional valve 6, an orifice plate flow meter 7, and a glass rotor flow meter 8.

[0019] The solenoid valve assembly 3 includes multiple solenoid valve inlets 4 and one solenoid valve outlet 5. The number of solenoid valve inlets 4 can be set to 6-10, depending on the equipment model. In this embodiment, there are 10 solenoid valve inlets 4. Each solenoid valve inlet 4 is connected to an inlet nozzle 2 via a pipeline. One inlet nozzle 2 is connected to zero gas, and the other inlets 2 are connected to gas cylinders containing different types or concentrations of gases. The solenoid valve outlet 5 of the solenoid valve assembly 3 is connected in sequence via a pipeline to a proportional valve 6, an orifice plate flow meter 7, and a three-way connector 9. The second interface of the three-way connector 9 is connected to a glass rotor flow meter 8, which is connected to an exhaust gas inlet 10. The third interface of the three-way connector 9 is connected to an outlet nozzle 11, which is used to connect to the equipment to be calibrated.

[0020] To facilitate connection to gas cylinders and the equipment to be calibrated, and for ease of maintenance, the outer casing 1 is assembled from two parts: an upper casing 19 and an L-shaped base 20. A connector panel 21 is mounted on the base 20. The solenoid valve inlet 4, exhaust port 10, and outlet port 11 of the solenoid valve assembly 3 are all fixed to the connector panel 21, with their connecting parts extending out of the outer casing 1. This allows for quick assembly and disassembly of the gas cylinders and the equipment to be calibrated from the outside of the device. The solenoid valve assembly 3, proportional valve 6, orifice plate flow meter 7, and glass rotor flow meter 8 are all arranged on the base 20 inside the outer casing 1. This rational arrangement reduces the internal volume, decreases the overall size of the device, and increases its portability. A handle 12 is provided on the top of the outer casing 1 for easy movement.

[0021] All the above-mentioned pipelines are made of polytetrafluoroethylene (PTFE), and other components in contact with the gas are made of 316 stainless steel, which greatly reduces the adsorption effect of the gas path on the gas and ensures calibration accuracy.

[0022] A main control board 13 is also mounted on the vertical surface of the base 20. The solenoid valve group 3, proportional valve 6, and orifice plate flow meter 7 are all electrically connected to the main control board 13. At the same time, a touch screen 18 electrically connected to the main control board 13 is mounted on the outer casing 1. Through the touch screen 18, users can configure parameters such as gas type and concentration in the setting interface. The proportional valve 6 can achieve high-precision adjustment of gas flow, the orifice plate flow meter 7 can achieve real-time monitoring of gas flow, and the glass rotor flow meter 8 can detect the actual gas condition and flow rate at the exhaust port to help determine the flow rate of the gas outlet 11.

[0023] The base 20 has heat dissipation holes on its bottom surface and a cooling fan 14 is installed on its vertical surface. The cooling fan 14 can ensure airflow inside the device and dissipate heat for the internal components.

[0024] The base 20 of the outer casing 1 is also equipped with a USB interface 15, which allows for data backup and system upgrades by connecting external devices. A TF upgrade card 16 is installed inside the outer casing 1 for system upgrades.

[0025] The outer casing 1 is also equipped with a 485 communication socket 17, which can communicate with the instrument being calibrated and directly control the gas mixing calibration device through the instructions of the instrument being calibrated; at the same time, the main control board 13 integrates a Wi-Fi and Bluetooth data transmission module, which can remotely transmit data.

[0026] The operation process of this multi-channel gas mixing calibration device is as follows: Before starting the multi-channel gas mixing calibration device, the gas cylinder is pressure-regulated via a pressure reducing valve and then connected to the device through a compression fitting. Simultaneously, the outlet nozzle 11 and the 485 communication socket 17 are connected to the instrument to be calibrated. The calibration mode is divided into manual and automatic modes. In manual mode, the user can configure parameters such as gas type and concentration on the touchscreen 18's settings interface and independently control the flow rate of a single gas channel. In automatic mode, the calibration device receives instructions from the instrument being calibrated via the 485 communication socket 17 and automatically performs flow control, pipeline cleaning, and gas switching throughout the entire process without human intervention. After gas mixing is completed, local and remote status alerts are sent via Wi-Fi and Bluetooth data transmission modules.

[0027] After the calibration device is started, the gas is delivered to the solenoid valve group 3 through the pipeline. The main control board 13 controls the opening and closing of the solenoid valve group 3, selects the target gas source channel and opens it. The gas flows through the proportional valve 6 and the orifice plate flow meter 7 in sequence to achieve accurate measurement. After the instrument being calibrated uses the required flow rate, the excess gas is discharged through the exhaust gas inlet 10. At the same time, the glass rotor flow meter 8 monitors the exhaust gas status and flow rate in real time.

[0028] The multi-channel gas mixing calibration device described in this embodiment connects to nine standard gas channels and one zero gas channel via a multi-inlet, one-outlet solenoid valve assembly 3. This allows for the calibration of multiple concentrations of a single gas or nine different gases. No manual gas cylinder replacement or pipeline switching is required, enabling rapid gas switching and ensuring no cross-contamination. This significantly reduces the impact of manual intervention and operation time, improving calibration efficiency and reliability. The integrated solenoid valve assembly 3 reduces gas path length and instrument size, resulting in a compact structure that facilitates transportation and deployment. Equipped with a 485 communication socket 17 and Wi-Fi and Bluetooth data transmission modules, it can receive commands from the instrument being calibrated and automatically perform flow control, pipeline cleaning, and gas switching. Upon completion of calibration, it can send local and remote status alerts.

[0029] 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 other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the present invention.

Claims

1. A multi-channel gas distribution calibration device, characterized by: The application relates to a multi-inlet and multi-outlet electromagnetic valve group, wherein the air inlet of the electromagnetic valve of the electromagnetic valve group is connected with an air inlet nozzle through a pipeline, the air outlet of the electromagnetic valve group is connected with a proportional valve, an orifice flowmeter and a three-way joint nozzle through a pipeline in sequence, the second joint of the three-way joint nozzle is connected with a glass rotor flowmeter, the glass rotor flowmeter is connected with a waste gas joint nozzle, and the third joint of the three-way joint nozzle is connected with an air outlet joint nozzle.

2. The multi-pass gas distribution calibration device of claim 1, wherein: The electromagnetic valve group comprises 6-10 air inlets of electromagnetic valves.

3. The multi-pass gas distribution calibration device of claim 1, wherein: A main control board is further arranged, and the electromagnetic valve group, the proportional valve and the orifice flowmeter are electrically connected with the main control board.

4. The multi-pass gas distribution calibration device of claim 3, wherein: A shell is further arranged, and a touch screen electrically connected with the main control board is arranged on the shell.

5. The multi-pass gas distribution calibration device of claim 4, wherein: The air inlets of the electromagnetic valves of the electromagnetic valve group, the waste gas joint nozzle and the air outlet joint nozzle are arranged on the shell.

6. The multi-pass gas distribution calibration device of claim 4, wherein: A Wi-Fi and Bluetooth data transmission module is integrated on the main control board.

7. The multi-pass gas distribution calibration device of claim 4, wherein: A USB interface is arranged on the shell.

8. The multi-pass gas distribution calibration device of claim 4, wherein: Heat dissipation holes are arranged on the shell, and a heat dissipation fan is arranged in the shell.

9. The multi-pass gas distribution calibration device of claim 4, wherein: A handle is arranged on the top of the shell.

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