A gas flowmeter leak detection system

Abstract

This utility model belongs to the field of sealing test technology, specifically relating to a gas flow meter sealing test system, comprising: a gas source component for supplying gas; a test device, wherein the gas outlet of the gas source component is connected to the gas inlet of the test device via a pipeline, and the device to be tested is connected to the test device; along the airflow direction of the pipeline, a switching valve, an automatic valve, and a pressure monitoring component are provided on the pipeline, the automatic valve and the pressure monitoring component being electrically connected for automatic valve opening and closing; the system enables automatic control of the gas through the cooperation of the pressure monitoring component and the automatic component, allowing the gas flow meter to automatically shut off when the detected value is reached, improving the accuracy of pressure control, eliminating the need for manual control, and preventing deviations in the gas pressure entering the test device from the specified detection value due to delays during manual shut-off.

Description

Technical Field

[0001] This utility model belongs to the field of sealing test technology, and specifically relates to a gas flow meter sealing test system. Background Technology

[0002] A gas flow meter is an instrument used to measure the flow rate of gas. It is installed in a pipeline to record the amount of gas flowing through it. Therefore, its airtightness must be guaranteed. Good airtightness is necessary to prevent errors caused by leakage when detecting gas flow. Thus, it is crucial to perform an airtightness test before using a gas flow meter. The airtightness test mainly checks for leaks at the various connection points of the gas flow meter. The process involves introducing the test gas into the flow meter and bringing the internal pressure to a certain range. The gas supply is then shut off, and the pressure change in the flow meter is monitored using a pressure gauge or other pressure-measuring device. If the pressure in the flow meter does not change within a specified time, the airtightness test is passed, and there is no leakage. If the pressure decreases within the specified time, the airtightness of the container being tested is unqualified, and there is a leak.

[0003] Current detection devices and equipment require manual control of the gas supply and the amount of gas introduced into the gas flow meter. This process can lead to deviations or errors in the gas flow due to differences in hand speed, force, and time during manual control, resulting in deviations in the detection process and results. Summary of the Invention

[0004] Based on this, this application provides a gas flow meter sealing test system to solve the technical problem that the test results are inaccurate due to manual error when the gas source is manually controlled for testing in the prior art.

[0005] The technical solution to the above-mentioned technical problems in this application is as follows:

[0006] A gas flow meter sealing performance testing system, comprising:

[0007] Gas supply components, used for gas supply;

[0008] The detection device has an air source component outlet connected to the air inlet of the detection device via a pipe, and the device to be tested is connected to the detection device.

[0009] Along the airflow direction of the pipeline, a switching valve, an automatic valve, and a pressure monitoring component are installed on the pipeline. The automatic valve and the pressure monitoring component are electrically connected for automatic valve opening and closing.

[0010] Preferably, the pipeline is further provided with a primary pressure regulating component, which is located between the gas source component and the switching valve.

[0011] Preferably, the pipeline is further provided with a secondary pressure regulating component, which is located between the primary pressure regulating component and the switching valve.

[0012] Preferably, the pipeline is further provided with an on / off valve, which is located at the gas outlet end of the gas source assembly.

[0013] Preferably, the device further includes a prompting component, which is disposed on the detection device, and the air pressure monitoring component and the prompting component are electrically connected.

[0014] Preferably, the pipeline is further provided with two pressure relief components, located between the switching valve and the on / off valve, and between the automatic valve and the detection device, respectively.

[0015] Preferably, the primary pressure regulating component is provided with an oil and gas filtration section.

[0016] Preferably, the detection device includes a base, two clamping parts slidably connected to the left and right sides of the base, and a gas supply part disposed on the clamping parts to supply gas to the gas flow meter. The two clamping parts can clamp the gas flow meter and connect the gas supply part to the gas flow meter.

[0017] Preferably, the clamping part includes a side arm, and screws are provided on both the left and right sides of the base, with the lower side of the side arm connected to the screws through a threaded hole.

[0018] Preferably, the air supply unit includes an air pipe and a conical nozzle disposed at the inner end of the air pipe, with a sealing gasket disposed on the inner side of the conical nozzle.

[0019] Compared with the prior art, this application has at least the following advantages:

[0020] This application provides a gas flow meter sealing performance testing system. The gas flow meter is installed on a testing device. Opening the switching valve releases the gas supply from the gas source component. The pipeline guides the gas supply to the automatic component. The testing device then introduces gas into the gas flow meter. A pressure monitoring component monitors the gas pressure within the flow meter. When the pressure reaches a set value (the value at which the automatic component shuts off automatically, i.e., the pressure required for testing), the pressure monitoring component sends a signal back to the automatic component. The automatic component then shuts off automatically and maintains this position for a specified period (the prescribed testing time). By monitoring changes in the gas pressure within the flow meter through the pressure monitoring component, the system can determine the gas flow meter's sealing performance. By observing the values ​​displayed on the pressure monitoring component, inspectors can determine whether the pressure in the gas flow meter has changed and whether the gas flow meter's airtightness meets the standards. The pressure monitoring component, in conjunction with the automatic control component, enables automatic control of the gas flow meter. This allows the gas to automatically shut off when the measured value is reached, improving the accuracy of pressure control and eliminating the need for manual control. This prevents delays during manual shut-off from causing deviations in the gas pressure entering the detection device from the specified measured value, thus avoiding errors or inaccuracies in the test results. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the gas flow meter sealing test system of this application;

[0022] Figure 2 This is a schematic diagram of the testing device used in this application.

[0023] In the diagram: Gas source assembly 100; Pipeline 110; Switching valve 200; On / off valve 210; Primary pressure regulating assembly 300; Secondary pressure regulating assembly 400; Automatic valve 500; Pressure monitoring assembly 600; Detection device 700; Base 710; Screw 720; Side arm 730; Air pipe 740; Conical nozzle 750; Sealing gasket 760; Pressure relief assembly 800; Indication assembly 900. Detailed Implementation

[0024] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this application.

[0025] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," "top," "bottom," "end," "top," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] Please refer to Figure 1 and Figure 2 In one specific embodiment of this application,

[0028] A gas flow meter sealing performance testing system, comprising:

[0029] Gas supply assembly 100, used for gas supply;

[0030] The detection device 700 has its outlet end of the gas source component 100 connected to its inlet end via a pipe 110, and the device to be tested is connected to the detection device 700.

[0031] Along the airflow direction of the pipe 110, a switching valve 200, an automatic valve 500 and a pressure monitoring component 600 are provided on the pipe 110. The automatic valve 500 and the pressure monitoring component 600 are electrically connected and used for opening and closing the automatic valve 500.

[0032] Among them, the air source component 100 can be an air compressor, an air storage tank, or a device capable of generating air pressure; the switching valve 200 can be a ball valve, a check valve, or a device capable of controlling fluid flow; the automatic valve 500 can be an automatic valve or a device capable of automatically opening and closing and controlling fluid; the air pressure monitoring component 600 can be a pressure gauge or a device and equipment capable of displaying air pressure; and the detection device 700 can be a gas flow meter detection device or a gas flow meter detection equipment.

[0033] The testing process is as follows: A gas flow meter is installed on the testing device 700, and the testing device 700 is connected to the gas flow meter. The pressure monitoring component 600 monitors the internal pressure of the gas flow meter. At this time, the switching valve 200 is closed. Then, the testing personnel manually open the switching valve 200, causing the gas source component 100 to release the gas source. The gas source is then directed to the automatic valve 500 via pipe 110. The gas flows through the automatic valve 500 into the testing device 700, which then introduces gas into the gas flow meter. The pressure monitoring component 600 monitors the pressure in the gas flow meter. When the pressure reaches the set value (the value when the automatic valve 500 automatically closes, which is the pressure value required for testing), the pressure monitoring component 600 sends a signal back to the automatic valve 700. The automatic valve 500 closes automatically and remains closed for a specified period (the designated testing time) to prevent gas from entering the testing device 700. At this point, the pressure exerted by the testing device 700 on the gas flow meter will no longer increase. The pressure monitoring component 600 can then monitor the pressure changes within the gas flow meter to determine if the pressure has changed and whether the gas flow meter's airtightness meets the standard. For example, a decrease in pressure indicates a gas leak, meaning the gas flow meter is not airtight. Conversely, if the pressure remains constant, the airtightness is acceptable. After testing, the switching valve 200 can be closed.

[0034] In this way, the gas pressure monitoring component 600 and the automatic valve 500 can work together to achieve automatic control of the gas. This allows the gas flow meter to automatically shut off when it reaches the detection value, improving the accuracy of gas pressure control. It eliminates the need for manual control and prevents the gas pressure entering the detection device 700 from deviating from the specified detection value due to delays during manual shut-off, which could lead to errors or inaccuracies in the detection results.

[0035] In practical applications, gas needs to be continuously introduced into the detection device 700 to gradually increase the internal pressure of the gas flow meter to be tested to a specified range. If the gas pressure supplied by the gas source component 100 is too high, the gas flow meter to be tested may be damaged due to excessive pressure. If the gas pressure is too low, more time is required for the internal pressure of the gas flow meter to be tested to gradually increase to the specified range, thus prolonging the detection time. Therefore, in this application,

[0036] The pipeline 110 is also equipped with a primary pressure regulating component 300, which is located between the gas source component 100 and the switching valve 200.

[0037] The primary pressure regulating component 300 can be a pressure regulating valve or a device or equipment capable of regulating fluid pressure. It is installed between the gas source component 100 and the switching valve 200. Initially, the switching valve 200 is closed, and the gas in the gas source component 100 does not flow. At the start of detection, the switching valve 200 is opened, allowing gas to flow. When the gas from the gas source component 100 flows through the primary pressure regulating component 300, the primary pressure regulating component 300 regulates the first pressure (the pressure of the gas flowing out of the gas source component 100), so that the second pressure formed after flowing through the primary pressure regulating component 300 is close to the pressure required by the gas flow meter being tested, thereby... After passing through the first-stage pressure regulating component 300, the gas flow rate tends to stabilize, ensuring a stable flow of gas into the gas flow meter to be tested. This avoids damage to the gas flow meter due to excessively high gas pressure, and also prevents prolonged testing time due to excessively low gas pressure. In other words, when the gas pressure is too high, the first-stage pressure regulating component 300 adjusts the pressure to a lower level; when the gas pressure is too low, it adjusts the pressure to a higher level. This ensures that the adjusted gas pressure is closer to the pressure required by the gas flow meter to be tested, allowing the gas to enter the gas flow meter stably during the testing process and reach the specified pressure as the gas volume increases.

[0038] Furthermore, if an air compressor is selected as the air source component 100, the air produced will contain oil mist due to the air compressor's own lubrication system and the oil naturally present in the air. If not cleaned promptly, this will not only contaminate the internal components but also affect the gas flow meter. Therefore, in this application…

[0039] The primary pressure regulating component 300 is equipped with an oil-gas filtration section. The oil-gas filtration section can be an oil-gas filter, an oil-gas filtration device, or an oil-gas filter screen, which can filter the oil mist in the gas as it flows through, preventing the oil mist from entering the gas flow meter to be tested and causing the inside of the gas flow meter to become dirty.

[0040] During the testing process, when gas enters the gas flow meter to be tested, it needs to be filled first. Then, as more gas is added, the gas volume is increased. Utilizing the principle that gas volume is proportional to pressure, the internal pressure of the gas flow meter gradually increases. This process requires two steps: first, filling the gas flow meter, and then starting the accumulation phase. This process is time-consuming. Therefore, to save time and shorten the testing time, in this application…

[0041] The pipeline 110 is also equipped with a secondary pressure regulating component 400, which is located between the primary pressure regulating component 300 and the switching valve 200.

[0042] The secondary pressure regulating component 400 can be a pressure regulating valve, a device or equipment for regulating fluid pressure, or a pressure regulating valve with a digital display function. When the gas, after being regulated by the primary pressure regulating component 300, flows through the secondary pressure regulating component 400, the secondary pressure regulating component 400 can adjust the gas pressure to the specified pressure (the pressure required for testing by the gas flow meter). Then, the gas flows into the gas flow meter to be tested and fills it completely. After the gas pressure in the gas flow meter reaches the standard, the automatic valve 500 immediately closes, and testing can be performed. This speeds up the testing process and eliminates the need to increase the gas volume after the gas flow meter is filled to reach the test pressure, thus shortening the testing time.

[0043] After the test is completed, although closing the switching valve 200 can prevent the gas from continuing to act on the automatic valve 500, the primary pressure regulating component 300 and the secondary pressure regulating component 400 connected upstream of the switching valve 200 (between the gas source component 100) will still be affected by the gas from the gas source component 100. Over time, this can easily affect the sensitivity and regulating capability of the primary pressure regulating component 300 and the secondary pressure regulating component 400. Therefore, in this application,

[0044] The pipeline 110 is also equipped with an on / off valve 210, which is located at the gas outlet end of the gas source assembly 100.

[0045] After the test is completed, the gas source assembly 100 is shut off by manually closing the on / off valve 210. No gas will flow out, preventing gas from acting on the primary pressure regulating assembly 300 and the secondary pressure regulating assembly 400 and affecting them. This ensures that the primary pressure regulating assembly 300 and the secondary pressure regulating assembly 400 can work stably and extends their service life.

[0046] In actual testing, when the gas pressure in the gas flow meter reaches the testing standard, it needs to be maintained for a certain period of time, such as 10-15 minutes or longer. Although the gas pressure monitoring component 600 can display the gas pressure value in real time, prolonged visual observation by the testing personnel can cause fatigue, and continuous observation is not feasible. Therefore, to conserve the testing personnel's energy, protect their eyes, and allow them to rest, this application...

[0047] The pipeline 110 is also provided with a prompting component 900, which is located in the detection device 700 and can prompt the air pressure status inside the detection device 700. The air pressure monitoring component 600 and the prompting component 900 are electrically connected.

[0048] The prompting component 900 can be a signal light or a color-changing device, or a buzzer or other device capable of emitting a prompt sound. When the prompting component 900 is electrically connected to the barometric pressure monitoring component 600, changes in the barometric pressure in the detection device 700 will cause changes in the readings of the barometric pressure monitoring component 600. When the changes in the readings of the barometric pressure monitoring component 600 exceed a reasonable range, the barometric pressure monitoring component 600 will transmit a signal to the prompting component 900, which will then issue a prompt, promptly notifying the testing personnel and enabling them to observe the testing process and results in a timely manner.

[0049] For example, the indicator component 900 is a device with three indicator lights: red, yellow, and green. During the testing process, when gas flows into the testing device 700 and the gas flow meter and reaches the testing standard range, the yellow indicator light illuminates, and the automatic valve 500 closes, indicating the start of the test. The air pressure monitoring component 600 monitors the air pressure in real time. Assuming the test lasts 10 minutes, the yellow indicator light remains illuminated during this period. After 10 minutes, if the air pressure detected by the air pressure monitoring component 600 remains within the standard range, the yellow indicator light turns off, and the green indicator light illuminates, indicating that the test is qualified. If, within the 10-minute testing period, the air pressure detected by the air pressure monitoring component 600 exceeds the standard range, the yellow indicator light turns off, and the red indicator light illuminates, indicating that the test is unqualified. The testing personnel can judge the test results by the indications of the red, yellow, and green indicator lights.

[0050] In actual operation, when the automatic valve 500 is closed and the gas flow meter to be tested begins detection, the entire pipeline used to transport the gas is filled with gas. The gas pressure acts on the pipeline, the two switching valves 200, the primary pressure regulating component 300, the secondary pressure regulating component 400, and the automatic valve 500. Prolonged operation can easily lead to a decrease in the sensitivity and working capacity of these components. Therefore, in this application...

[0051] Two pressure relief components 800 are also provided on the pipeline 110, located between the switching valve 200 and the on / off valve 210, and between the automatic valve 500 and the detection device 700, respectively.

[0052] The pressure relief assembly 800 can be a pressure relief valve or a device or equipment that can be connected to a pipeline to discharge fluid. During operation, after the automatic valve 500 is closed and the gas flow meter to be detected starts and finishes detecting, the on / off valve 210 connected to the gas source assembly 100 is manually closed. Then, the pressure relief assembly 800 between the on / off valve 210 and the switching valve 200 discharges the gas in the pipeline 110 to the outside, thereby making the gas pressure in the pipeline consistent with the outside pressure. This prevents the pressure generated by the gas in the pipeline from acting on the components for a long time, thus avoiding affecting the sensitivity and working capacity of the components and protecting the components.

[0053] Meanwhile, during the testing process, after testing a gas flow meter, when removing the gas flow meter, it is necessary to release the gas in the gas flow meter and the testing device 700. Therefore, by using another pressure relief component 800 located between the automatic valve 500 and the testing device 700, air can be released to keep the air pressure inside the testing device 700 and the gas flow meter consistent with the external ambient air pressure.

[0054] Specifically, an embodiment of the detection device 700 in the above process is provided:

[0055] The detection device 700 includes a base 710, two clamping parts slidably connected to the left and right sides of the base 710, and a gas supply part disposed on the clamping parts to supply gas to the gas flow meter. The two clamping parts can clamp the gas flow meter and connect the gas supply part to the gas flow meter.

[0056] The clamping part can be a clamp, or a device or equipment capable of clamping the gas flow meter, or a gas flow meter air tightness testing device with publication number CN221945490U. The gas supply part is a device or pipeline capable of introducing gas into the gas flow meter.

[0057] After clamping the gas flow meter with the two clamping parts, the gas supply part is connected to the inside of the gas flow meter. Then, the on-off valve 210 and the switching valve 200 are opened in sequence, allowing gas to pass through the gas supply part and enter the gas flow meter. When the gas pressure reaches the specified range, the automatic valve 500 automatically closes and starts to detect the gas flow meter. After the detection is completed, the gas pressure in the gas flow meter is released through the pressure relief component 800, and then it can be removed.

[0058] Specifically, an embodiment of the clamping part in the above process is provided:

[0059] The clamping part includes a side arm 730, and screws 720 are provided on both the left and right sides of the base 710. The lower side of the side arm 730 is connected to the screws 720 through a threaded hole.

[0060] The base 710 is equipped with a motor or other power source that can drive the screw 720 to rotate. When the screw 720 rotates, it causes the side arm 730 to slide and contact the base 710 towards the center, thus clamping the gas flow meter between the two side arms 730.

[0061] Specifically, an embodiment of the gas supply unit in the above process is provided:

[0062] The air supply unit includes an air pipe 740 and a conical nozzle 750 disposed at the inner end of the air pipe 740, and a sealing gasket 760 is disposed on the inner side of the conical nozzle 750.

[0063] The air tube 740 is mounted on the side arm 730. When the side arm 730 clamps the gas flow meter, it can bring the air tube 740 closer to the gas flow meter and allow the conical nozzle 750 to enter the inlet end of the gas flow meter. This allows the end of the gas flow meter to contact the sealing gasket 760 to complete the seal, thereby forming a sealed space inside the gas flow meter for gas flow. Then, the gas in the pipe 110 can be introduced through the outer end of the air tube 740 to enter the gas flow meter to monitor the air tightness.

[0064] Here is an illustrative implementation process for the above solution:

[0065] Connect the outlet end of pipe 110 to the air pipe 740, then clamp the gas flow meter between the two side arms 730, blocking both ends of the gas flow meter with the side arms 730. The side arms 730 with the air pipe 740 can bring the conical nozzle 750 into the inlet end of the gas flow meter. Open the on / off valve 210 at the outlet end of the gas source assembly 100, and the gas will flow through pipe 110 into the first-stage pressure regulating assembly 300. After the initial pressure regulation by the first-stage pressure regulating assembly 300, and through oil-gas filtration... The gas flow meter filters out oil mist to prevent it from entering. The filtered gas then enters the secondary pressure regulating component 400 for further pressure regulation. After secondary pressure regulation, the gas flows into the switching valve 200. The operator simply needs to manually open the switching valve 200 to allow the gas to flow through the automatic valve 500 and into the gas flow meter. At this time, the pressure monitoring component 600 monitors the gas pressure in the flow meter in real time. When the pressure reaches the detection requirement, a yellow indicator light is displayed on the indicator component 900. When the color indicator light illuminates, the air pressure monitoring component 600 transmits a signal to the automatic valve 500, which automatically closes. Then, the operator manually closes the switching valve 200 and waits for the detection time to end. During the detection process, if the air pressure in the air pressure monitoring component 600 decreases, it indicates a leak in the gas flow meter. In this case, the red indicator light illuminates, and the yellow indicator light goes out. If no leak occurs, the air pressure detected by the air pressure monitoring component 600 will not change until the detection time ends, at which point the yellow indicator light goes out and the green indicator light illuminates. Then, the gas flow meter is released via the side arm 730, and the detected gas flow meter can be removed. Another gas flow meter is then clamped, and the above operation is repeated until all gas flow meters have been detected. Then, the on / off valve 210 can be closed to prevent further gas leakage from the gas source component 100. Finally, the pressure relief component 800 removes the gas involved in the pipeline 110, ensuring that the air pressure inside the pipeline 110 is consistent with the external pressure, thus completing the detection process.

[0066] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A gas flow meter sealing performance testing system, characterized in that, include: Gas supply components, used for gas supply; The detection device has an air source component outlet connected to the air inlet of the detection device via a pipe, and the device to be tested is connected to the detection device. Along the airflow direction of the pipeline, a switching valve, an automatic valve, and a pressure monitoring component are installed on the pipeline. The automatic valve and the pressure monitoring component are electrically connected for automatic valve opening and closing.

2. The gas flow meter sealing test system as described in claim 1, characterized in that, The pipeline is also equipped with a primary pressure regulating component, which is located between the gas source component and the switching valve.

3. The gas flow meter sealing test system as described in claim 2, characterized in that, The pipeline is also equipped with a secondary pressure regulating component, which is located between the primary pressure regulating component and the switching valve.

4. The gas flow meter sealing test system as described in claim 1, characterized in that, The pipeline is also equipped with an on / off valve, which is located at the gas outlet end of the gas source assembly.

5. The gas flow meter sealing test system as described in claim 1, characterized in that, It also includes a prompting component, which is disposed on the detection device, and the air pressure monitoring component and the prompting component are electrically connected.

6. The gas flow meter sealing test system as described in claim 4, characterized in that, The pipeline is also equipped with two pressure relief components, located between the switching valve and the on / off valve, and between the automatic valve and the detection device, respectively.

7. The gas flow meter sealing test system as described in claim 2, characterized in that, The primary pressure regulating component is equipped with an oil and gas filtration section.

8. The gas flow meter sealing test system as described in claim 1, characterized in that, The detection device includes a base, two clamping parts slidably connected to the left and right sides of the base, and a gas supply part disposed on the clamping parts to supply gas to the gas flow meter. The two clamping parts can clamp the gas flow meter and connect the gas supply part to the gas flow meter.

9. The gas flow meter sealing test system as described in claim 8, characterized in that, The clamping part includes a side arm, and screws are provided on both the left and right sides of the base. The lower side of the side arm is connected to the screws through a threaded hole.

10. The gas flow meter sealing test system as described in claim 9, characterized in that, The air supply unit includes an air pipe and a conical nozzle disposed at the inner end of the air pipe, with a sealing gasket disposed on the inner side of the conical nozzle.

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