Portable inspection device for gas flow controller

Abstract

The utility model relates to the technical field of equipment detection, in particular to a portable inspection device of a gas flow controller, which comprises an air pressure adjusting module used for inputting gas and adjusting gas pressure; the detection assembly comprises a pressure gauge, a float flowmeter and a timer, the pressure gauge is connected with the air pressure adjusting module, and the float flowmeter is connected behind the air pressure adjusting module and the air flow controller in series through an air path structure; the vacuum pump is connected with the gas circuit structure; the power supply module supplies power to the air pressure adjusting module, the timer, the vacuumizing module and the air flow controller; the air pressure adjusting module, the detection assembly, the vacuum pump and the power supply module are all integrated on the box body. The device is small in size, convenient to carry and capable of achieving multiple testing functions of flow testing, airtight pressure maintaining, vacuumizing and the like, and the testing efficiency of the gas flow controller is improved.

Description

Technical Field

[0001] This application relates to the field of equipment testing technology, and in particular to a portable testing device for a gas flow controller. Background Technology

[0002] Currently, coal mines are gradually adopting gas flow controllers for sensor calibration. The gas flow controller connects to both a zero-gas cylinder and a calibration gas cylinder. Once activated, the controller automatically outputs the gas required for sensor calibration, typically at a flow rate of 200-300 ml / min. Operators no longer need to manually adjust the cylinder valves and flow meters, simplifying the sensor calibration process.

[0003] Gas flow controllers require periodic testing of their flow output performance under different gas pressures and voltages to ensure that their flow output error meets the specific requirement of 2.5-level flow accuracy in the standard "AQ6203-2006 Low-Concentration Carrier Catalytic Methane Sensor for Coal Mines". Since the gas flow controller is directly connected to the high-pressure gas line of the gas cylinder during use, the airtightness of the gas flow controller and the gas cylinder line must be periodically checked to ensure there are no safety hazards related to gas leakage.

[0004] Currently, each of the above test items requires separate testing equipment, which involves complex piping, is difficult to store, and is cumbersome to operate, making it inconvenient for coal mine users to perform daily maintenance and inspection of the gas flow controller. Utility Model Content

[0005] The technical problem this invention aims to solve is that existing testing equipment for gas flow controller cylinder gas circuit detection has limited functionality, complex structure, and cumbersome operation, making it inconvenient for coal mine users to perform daily maintenance and inspection of gas flow controllers.

[0006] Therefore, this utility model provides a portable testing device for a gas flow controller.

[0007] The technical solution adopted by this utility model to solve its technical problem is:

[0008] A portable testing device for gas flow controllers, comprising:

[0009] A pressure regulating module, which is used to input gas and adjust the gas pressure;

[0010] The detection component includes a pressure gauge, a float flow meter, and a timer. The pressure gauge is connected to the air pressure regulating module, and the float flow meter is connected in series after the air pressure regulating module and the gas flow controller through an air circuit structure.

[0011] A vacuum pump, which is connected to a gas path structure;

[0012] A power supply module, which supplies power to the pressure regulation module, timer, vacuum module and gas flow controller;

[0013] The pressure regulation module, detection components, vacuum pump, and power supply module are all integrated into the enclosure.

[0014] Furthermore, the gas path structure includes a first gas outlet, a second gas outlet, a return gas outlet, and a vacuum port. The first and second gas outlets are respectively connected to the zero gas pipeline inlet and the standard gas pipeline inlet of the gas flow controller. The gas outlet of the gas flow controller is connected to the float flow meter through the return gas outlet. The housing is provided with an exhaust port connected to the float flow meter. The vacuum port is connected to a vacuum pump.

[0015] Furthermore, the air pressure regulating module includes an air inlet and a pressure regulating manual valve. The air inlet is used to connect an external air source to the pressure regulating manual valve, and the pressure regulating manual valve is connected to both the first air outlet and the second air outlet.

[0016] Furthermore, the air pressure regulating module also includes a solenoid valve, and the pressure regulating manual valve is connected to the first air outlet and the second air outlet through the solenoid valve.

[0017] Furthermore, a filter is provided inside the housing, and the filter is located between the air inlet and the pressure regulating valve.

[0018] Furthermore, the power supply module includes a power switch, a solenoid valve switch, a vacuum switch, a DC regulated power supply adjustment panel, and a DC power output port. The power switch is connected to an external power source via a power plug. The power switch outputs multiple lines to a timer, a vacuum switch, a solenoid valve switch, and an adjustable DC regulated power supply, respectively. The vacuum switch is connected to a vacuum pump, the solenoid valve switch is connected to a solenoid valve, and the adjustable DC regulated power supply powers the gas flow controller via the DC power output port.

[0019] Furthermore, the end of the power switch furthest from the power plug is connected to a timer, a vacuum switch, a solenoid valve switch, and an adjustable DC regulated power supply via a transformer.

[0020] Furthermore, the pressure regulating valve, power switch, solenoid valve switch, vacuum switch, digital pressure gauge, float flow meter, timer, first air outlet, second air outlet, return air outlet, vacuum port, adjustment panel of DC regulated power supply, and DC power output port are all arranged on the front of the housing.

[0021] The beneficial effects of this utility model are that the portable testing device for gas flow controllers is small in size, easy to carry, and simple to use. It integrates multiple testing functions such as flow testing, airtight pressure maintenance, power fluctuation testing, and vacuuming, improving the testing efficiency of gas flow controllers and facilitating regular performance testing. Compared with single-function testing equipment, it solves the problems of complex pipelines, difficulty in storage, and cumbersome operation, reducing the maintenance difficulty of gas flow controllers for coal mine users. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Figure 1 This is a schematic diagram of the connection structure between the gas flow controller and the portable testing device in this application.

[0024] Figure 2 This is a schematic diagram of the structural arrangement of the front of the box in this utility model.

[0025] In the diagram: 1. Housing; 2. Power plug; 3. Power switch; 4. Transformer; 5. Exhaust port; 6. Solenoid valve switch; 7. Timer; 8. Vacuum switch; 9. Adjustable DC regulated power supply; 10. DC power output port; 11. Air inlet; 12. Filter; 13. Pressure regulating valve; 14. Solenoid valve; 15. Digital pressure gauge; 16. First air outlet; 17. Second air outlet; 18. Float flow meter; 19. Air return port; 20. Vacuum port; 21. Vacuum pump. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0027] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] A portable testing device for a gas flow controller includes a housing 1 and a testing mechanism integrated on the housing 1.

[0030] The testing mechanism includes a power supply module, a pressure regulation module, testing components, a vacuum pump 21, and a gas path structure. The power supply module includes a power switch 3, a solenoid valve switch 6, a vacuum switch 8, a DC regulated power supply adjustment panel, and a DC power output port 10. The pressure regulation module includes an air inlet 11, a filter 12, a pressure regulating manual valve 13, and a solenoid valve 14. The testing components include a float flow meter 18, a timer 7, and a digital pressure gauge 15. The gas path structure includes a first air outlet 16, a second air outlet 17, a return air port 19, and a vacuum port 20.

[0031] The filter 12 and vacuum pump 21 are located inside the housing 1, while the air inlet 11, pressure regulating valve 13, solenoid valve 14, digital pressure gauge 15, float flowmeter 18, power switch 3, solenoid valve switch 6, vacuum switch 8, timer 7, DC regulated power supply adjustment panel, first air outlet 16, second air outlet 17, return air port 19, and vacuum port 20 are all located on the outer wall of the housing 1. Furthermore, for ease of inspection, the pressure regulating valve 13, power switch 3, solenoid valve switch 6, vacuum switch 8, digital pressure gauge 15, float flowmeter 18, timer 7, first air outlet 16, second air outlet 17, return air port 19, vacuum port 20, DC regulated power supply adjustment panel, and DC power output port 10 are arranged on the front of the housing 1.

[0032] Specifically, the air inlet 11 is located on the outer wall of the housing 1. The air inlet 11 uses a through-plate quick-connect connector. One end of the air inlet 11 is quickly connected to an external air compressor via a PU air tube to supply air. The other end is connected to the filter 12 inside the housing 1. The filter 12 is a straight-through type filter used to effectively filter the air path and protect the air path components and the device under test. It is preferably an SMC brand ZFC series positive and negative pressure filter 12 with a pressure range of -0.1 to 1 MPa, a filtration accuracy of 5 μm, and a compact size. The end of the filter 12 away from the air inlet 11 is connected to a pressure regulating valve 13. The pressure regulating valve 13 is connected to a digital pressure gauge 15 via a solenoid valve 14. The solenoid valve 14 is used to open and close the air path. It is preferably a normally closed two-position two-way solenoid valve 14. In this application, the pressure regulating hand valve 13 is used for precise pressure regulation within the air circuit pressure range of 0.1 to 1 MPa. The air circuit pressure can be quickly adjusted by turning the hand valve knob, allowing for the output of a specified pressure air source to test the flow output accuracy of the gas flow controller at different air pressures. The digital display pressure gauge 15 is used to detect the real-time output pressure of the air circuit and can also be used for pressure holding and airtightness testing. An SMC brand ISE30A series digital display pressure switch is preferred, as it is compact and accurate. The timer 7 is used to time the airtightness and pressure holding test for 3 minutes. When the air circuit is under pressure holding condition, the solenoid valve 14 is closed, and the pressure change of the digital display pressure gauge 15 is observed and timed for 3 minutes to evaluate the airtightness of the controller.

[0033] Reference Figure 1 , Figure 1 The dashed arrows in the diagram indicate electrical connection lines. A power plug 2 is connected to the housing 1, which is connected to an external power source to power the detection components inside the housing 1. The power plug 2 is connected to a power switch 3. A transformer 4 is connected to the end of the power switch 3 furthest from the power plug 2. The end of the transformer 4 furthest from the power switch 3 outputs multiple lines that connect to a vacuum switch 8, a solenoid valve 14, an adjustable DC power supply 9, and a timer 7, respectively. The transformer 4 converts 220V AC power to 24V DC power to meet the input voltage requirements of the solenoid valve 14, vacuum pump 21, timer 7, and adjustable DC power supply 9.

[0034] The vacuum switch 8 is connected to the vacuum pump 21 inside the housing 1, and the vacuum pump 21 is connected to the vacuum port 20; a solenoid valve switch 6 is provided between the solenoid valve 14 and the power switch 3 to control the opening and closing of the gas path; the adjustable DC regulated power supply 9 is controlled by the panel, and the adjustable DC regulated power supply 9 can output a specified voltage (0~24V) to the gas flow controller through the DC power output port 10, thereby measuring the flow output accuracy of the gas flow controller under different voltages.

[0035] The housing 1 is also equipped with an exhaust port, which is connected to the vacuum pump 21 and the float flow meter 18. The exhaust port is responsible for discharging the measured gas flow from the testing device. The float flow meter 18 is used to evaluate the flow output characteristics of the gas flow controller. The flow meter needs to be fixed parallel to the device panel to ensure that the float measurement is not affected. The vacuum pump 21 can be connected to the gas cylinder assembly used with the gas flow controller to perform vacuuming on the gas cylinder, thereby ensuring the accuracy of the calibration gas source concentration used for the calibration of the gas flow controller.

[0036] The implementation principle of this application is as follows:

[0037] When testing the gas flow controller, connect the air compressor air circuit and the 220V power supply. Connect the air compressor air circuit to the air inlet 11 and turn on the power switch 3. Connect the first air outlet 16 and the second air outlet 17 to the zero gas pipeline inlet and the standard gas pipeline inlet of the gas flow controller, respectively. Connect the return air outlet 19 to the gas outlet of the gas flow controller. The return air outlet 19 introduces the gas flow controller's output airflow into the float flowmeter 18 for gas flow measurement. Connect the DC power output port 10 to the voltage input port of the gas flow controller and connect the vacuum port 20 to the gas cylinder output port that is matched with the gas flow controller.

[0038] Adjust the adjustable DC regulated power supply 9 to the voltage to be measured, and adjust the gas pressure to the gas pressure to be measured through the pressure regulating valve 13; open the solenoid valve 14, operate the gas flow controller to output the specified flow rate of gas, the gas enters the gas flow controller through the first gas outlet 16 and the second gas outlet 17, and enters the float flow meter 18 through the gas flow controller outlet and the return gas port 19 on the housing 1; observe the output value of the float flow meter 18 and compare it with the controller to confirm whether it meets the error requirements; adjust different gas pressures and voltages, and repeat the above steps.

[0039] Adjust the air pressure to the airtightness test pressure, close the solenoid valve 14, close the solenoid valve of the gas flow controller to make the gas flow controller air circuit closed loop, turn on the timer 7, record the pressure change of the digital pressure gauge 15 within a 3-minute cycle, and confirm whether the gas flow controller meets the airtightness requirements.

[0040] Finally, turn on the vacuum switch 8 and use the vacuum pump 21 to evacuate the gas cylinder to facilitate the next filling and calibration, ensure the gas sample concentration, complete the test, disconnect the gas line, and turn off the equipment.

[0041] In summary, the portable testing device for gas flow controllers proposed in this application is compact, easy to carry, and simple to use. It integrates multiple testing functions such as flow testing, airtight pressure testing, power fluctuation testing, and vacuum testing, improving the testing efficiency of gas flow controllers and facilitating regular performance testing. Compared to single-function testing devices, it solves the problems of complex piping, difficulty in storage, and cumbersome operation, reducing the maintenance difficulty for coal mine users of gas flow controllers.

[0042] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined by the scope of the claims.

Claims

1. A portable testing device for a gas flow controller, characterized in that, include A pressure regulating module, which is used to input gas and adjust the gas pressure; The detection component includes a pressure gauge, a float flow meter (18), and a timer (7). The pressure gauge is connected to the air pressure regulating module, and the float flow meter (18) is connected in series with the air pressure regulating module and the gas flow controller through an air circuit structure. Vacuum pump (21), the vacuum pump (21) is connected to the gas path structure; The power supply module provides power to the pressure regulating module, the timer (7), the vacuum module, and the gas flow controller. The pressure regulating module, detection component, vacuum pump (21), and power supply module are all integrated on the housing (1).

2. The portable testing device for the gas flow controller according to claim 1, characterized in that, The gas path structure includes a first gas outlet (16), a second gas outlet (17), a return gas outlet (19), and a vacuum port (20). The first gas outlet (16) and the second gas outlet (17) are respectively connected to the zero gas pipeline inlet and the standard gas pipeline inlet of the gas flow controller. The gas outlet of the gas flow controller is connected to the float flow meter (18) through the return gas outlet (19). The housing (1) is provided with an exhaust port connected to the float flow meter (18). The vacuum port (20) is connected to the vacuum pump (21).

3. The portable testing device for the gas flow controller according to claim 2, characterized in that, The air pressure regulating module includes an air inlet (11) and a pressure regulating valve (13). The air inlet (11) is used to connect an external air source to the pressure regulating valve (13). The pressure regulating valve (13) is connected to both the first air outlet (16) and the second air outlet (17).

4. The portable testing device for the gas flow controller according to claim 3, characterized in that, The air pressure regulating module also includes a solenoid valve (14), and the pressure regulating manual valve (13) is connected to the first air outlet (16) and the second air outlet (17) through the solenoid valve (14).

5. The portable testing device for the gas flow controller according to claim 3, characterized in that, The housing (1) is equipped with a filter (12), which is located between the air inlet (11) and the pressure regulating valve (13).

6. The portable testing device for the gas flow controller according to claim 5, characterized in that, The power supply module includes a power switch (3), a solenoid valve switch (6), a vacuum switch (8), a DC regulated power supply adjustment panel, and a DC power output port (10). The power switch (3) is connected to an external power source via a power plug (2). The power switch (3) outputs multiple lines to a timer (7), a vacuum switch (8), a solenoid valve switch (6), and an adjustable DC regulated power supply (9), respectively. The vacuum switch (8) is connected to a vacuum pump (21), and the solenoid valve switch (6) is connected to a solenoid valve (14). The adjustable DC regulated power supply (9) supplies power to the gas flow controller via the DC power output port (10).

7. The portable testing device for the gas flow controller according to claim 6, characterized in that, The end of the power switch (3) away from the power plug (2) is connected to the timer (7), vacuum switch (8), solenoid valve switch (6), and adjustable DC regulated power supply (9) via the transformer (4).

8. The portable testing device for the gas flow controller according to claim 7, characterized in that, The pressure regulating valve (13), power switch (3), solenoid valve switch (6), vacuum switch (8), digital pressure gauge (15), float flow meter (18), timer (7), first air outlet (16), second air outlet (17), return air port (19), vacuum port (20), adjustment panel of DC regulated power supply and DC power output port (10) are all arranged on the front of the box (1).

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