A flame arrester flow and pressure drop testing system

Abstract

This invention provides a flame arrester flow rate and pressure drop testing system, comprising: a power source for providing gas; a first testing module for testing the flow rate and pressure drop of a pipe-end flame arrester, the first testing module being connected to the power source; a second testing module for testing the flow rate and pressure drop of a pipeline flame arrester, the second testing module being connected to the first testing module; and a data acquisition and processing module for acquiring corresponding measurement data from the first and second testing modules, and for converting the measurement data for real-time display. This invention also provides a flame arrester flow rate and pressure drop testing method.

Description

Technical Field

[0001] This invention belongs to the field of flame arrester performance testing technology, specifically relating to a flame arrester flow pressure drop testing system. Background Technology

[0002] The internationally recognized standard for testing flame arresters is ISO 16852, "Flamearresters - Performance requirements, test methods and limits for use," with the latest version being the 2016 edition. However, this standard does not mention a mature and well-established flow and pressure drop testing system.

[0003] Currently, the testing systems at this stage have relatively limited functions. Existing flame arrester flow and pressure drop testing systems only have the function of testing the flow and pressure drop of flame arresters in pipelines, but not at the pipe end. Furthermore, the adjustment range is small, the numerical accuracy is low, and the error in the flow-pressure drop correspondence is large. Summary of the Invention

[0004] To address the technical problems described above, this invention aims to provide a flame arrester flow and pressure drop testing system. This system can perform flow and pressure drop tests on pipeline flame arresters and pipe-end flame arresters as specified in the standards. Furthermore, it offers a wide range of adjustable values, high numerical accuracy, and minimal error in the flow-pressure drop relationship.

[0005] Therefore, according to a first aspect of the present invention, a flame arrester flow pressure drop testing system is provided, comprising: a power source for providing gas; a first testing module for testing the flow pressure drop of a pipe-end flame arrester, the first testing module being connected to the power source; a second testing module for testing the flow pressure drop of a pipeline flame arrester, the second testing module being connected to the first testing module; and a data acquisition and processing module for acquiring corresponding measurement data from the first testing module and the second testing module, and being able to convert the measurement data for real-time display.

[0006] In one embodiment, the power source is an air compressor or a fan.

[0007] In one embodiment, the first test module includes: a first test pipeline connected to the power source; a test tank connected to the first test pipeline; an anemometer connected to the test tank for reading the wind speed inside the test tank; and a first pressure gauge connected to the test tank for reading the pressure inside the test tank.

[0008] In one embodiment, the top cover of the test tank is provided with multiple pipe interfaces of different diameters for connecting pipe-end flame arresters of different specifications and sizes. The pipe-end flame arrester to be tested is connected to the corresponding pipe interface through a matching connecting pipe.

[0009] In one embodiment, the length L1 of the connecting pipe and the diameter D of the test tank satisfy the following relationship: L1≤10D.

[0010] In one embodiment, a flow control valve is provided on the first test pipeline, and the flow control valve is located between the power source and the test tank to control and regulate the air flow rate in the first test pipeline.

[0011] In one embodiment, a first vortex flow meter is also provided on the first test pipeline. The first vortex flow meter is disposed between the flow control valve and the test tank and is used to read the air flow rate in the first test pipeline.

[0012] In one embodiment, the second test module includes: a second test pipeline connected to the first test pipeline via a connecting pipeline; an installation position formed in the second test pipeline for installing the pipeline flame arrester to be tested; and a second pressure gauge for reading the pressure difference between the two ends of the pipeline flame arrester, the two ends of the second pressure gauge being respectively connected to the second test pipeline and located at the two ends of the pipeline flame arrester.

[0013] In one embodiment, a second vortex flow meter is provided on the second test pipeline. The second vortex flow meter is located at the front end of the installation position and is used to read the air flow rate in the second test pipeline.

[0014] In one embodiment, the length of the second test pipeline satisfies the following relationship:

[0015] L2≥10D, L3=2D, L4≥10D, L5=2D;

[0016] Wherein, L2 is the distance between the front end of the second pressure gauge and the connecting flange at the upstream end of the second test pipeline, L3 and L4 are the distances between the front and rear ends of the second pressure gauge and the mounting position, respectively, and L5 is the distance between the rear end of the second pressure gauge and the end of the second test pipeline.

[0017] In one embodiment, a pneumatic valve is provided on the connecting pipeline, and the pneumatic valve is located near the test tank.

[0018] In one embodiment, the data acquisition and processing module includes a data acquisition unit and a workstation connected to the data acquisition unit. The flow control valve, the first vortex flow meter, the anemometer, the first pressure gauge, the pneumatic valve, the second vortex flow meter, and the second pressure gauge are respectively connected to the data acquisition unit for transmitting the acquired data information to the data acquisition system in real time, and then the workstation converts the signal for real-time display.

[0019] According to a second aspect of the present invention, a method for testing the flow rate and pressure drop of a flame arrester is provided, comprising the following steps:

[0020] Provide a flame arrester flow rate and pressure drop testing system as described above;

[0021] Install the flame arrester to be tested onto the test tank in the first test module, and close the pneumatic valve located between the first test module and the second test module. Perform the flow rate and pressure drop test of the flame arrester through the first test module.

[0022] Install the pipeline flame arrester to be tested into the mounting position in the second test module, remove the pipeline flame arrester and close the test tank, open the pneumatic valve, and perform the pipeline flame arrester flow and pressure drop test through the second test module.

[0023] During the corresponding tests, the data acquisition and processing module collects, records, and processes the relevant measurement data.

[0024] Compared with the prior art, the advantages of this application are:

[0025] The flow-pressure drop testing system and method for flame arresters according to the present invention can separately perform flow-pressure drop tests on pipeline flame arresters and on-pipe end flame arresters, with a large adjustment range, high numerical accuracy, and small error in the flow-pressure drop correlation. Therefore, it allows both on-pipe and pipeline flame arresters to share the same flow-pressure drop testing system, ensuring a large adjustment range, high numerical accuracy, and small error in the flow-pressure drop correlation while effectively saving equipment floor space, increasing equipment utilization, reducing unnecessary equipment additions, and effectively reducing safety hazards. Attached Figure Description

[0026] The present invention will now be described with reference to the accompanying drawings.

[0027] Figure 1 The structure of the flame arrester flow pressure drop test system according to the present invention is schematically shown.

[0028] Figure 2 schematically shown Figure 1The structure of the top cover of the test tank in the flame arrester flow and pressure drop test system is shown.

[0029] In this application, all drawings are schematic and are used only to illustrate the principles of the invention, and are not drawn to scale. Detailed Implementation

[0030] The invention will now be described with reference to the accompanying drawings.

[0031] Figure 1 The structure of the flame arrester flow rate and pressure drop testing system 100 according to the present invention is schematically shown. For example... Figure 1 As shown, the flame arrester flow-pressure drop testing system 100 includes a power source 1 for providing gas, a first testing module 2 for testing the flow-pressure drop of a pipe-end flame arrester, a second testing module 3 for testing the flow-pressure drop of a pipeline flame arrester, and a data acquisition and processing module 4. The first testing module 2 is connected to the power source 1. The second testing module 3 is connected to the first testing module 2. The data acquisition and processing module 4 is used to acquire the corresponding measurement data from the first testing module 2 and the second testing module 3, and can convert the measurement data for real-time display. This flame arrester flow-pressure drop testing system 100 can separately perform flow-pressure drop tests on pipeline flame arresters 5 and pipe-end flame arresters 7, and has a large adjustable range, high numerical accuracy, and small error in the flow-pressure drop correspondence.

[0032] According to the present invention, the power source 1 can be an air compressor or a fan, used to supply air to the corresponding pipelines of the first test module 2 and the second test module 3. The air compressor or fan is in a turned-off state before use.

[0033] like Figure 1 As shown, the first test module 2 includes a first test pipeline 21, a test tank 22, an anemometer 23, and a first pressure gauge 24. The first test pipeline 21 is connected to the power source 1. The test tank 22 is connected to the first test pipeline 21. The anemometer 23 is connected to the test tank 22 and is used to read the wind speed inside the test tank 22. The first pressure gauge 24 is connected to the test tank 22 and is used to read the pressure inside the test tank 22.

[0034] The test container 22 is provided with a top cover 220 (see Figure 2 ).like Figure 2 As shown, the top cover 220 of the test tank 22 is provided with multiple pipe interfaces 221 of different diameters for connecting flame arresters 5 of different specifications and sizes to be tested. The flame arrester 5 to be tested is connected to the corresponding size pipe interface 22 through the matching connecting pipe 222, thereby installing the flame arrester 5 to be tested onto the test tank 22.

[0035] According to the present invention, the length L1 of the connecting pipe 222 and the diameter D of the test tank 22 satisfy the following relationship: L1≤10D.

[0036] like Figure 1 As shown, a flow control valve 25 is provided on the first test line 21, and the flow control valve 25 is located between the power source 1 and the test tank 22. The flow control valve 25 is used to control and regulate the air flow rate in the first test line 21.

[0037] A first vortex flow meter 26 is also installed on the first test pipeline 21, and the first vortex flow meter 26 is located between the flow control valve 25 and the test tank 22. The first vortex flow meter 26 is used to read the air flow rate in the first test pipeline 21.

[0038] According to the present invention, the second test module 3 includes a second test line 31, a mounting position formed in the second test line 31, and a second pressure gauge 32. The second test line 31 is connected to the first test line 21 via a connecting line 6. The mounting position is used to install the pipeline flame arrester 7 to be tested. The front end of the second pressure gauge 32 ( Figure 1 The right end of the second test line 31 is connected to the corresponding front end of the pipeline flame arrester 7, and the rear end of the second pressure gauge 32 is ( Figure 1 The left end of the test line 31 is connected to the corresponding rear end of the pipeline flame arrester 7. The second pressure gauge 32 is used to read the pressure difference between the front and rear ends of the pipeline flame arrester 7. Here, it should be noted that the front end refers to the inlet end of the pipeline flame arrester 7, and the rear end refers to the outlet end of the pipeline flame arrester 7.

[0039] like Figure 1 As shown, a second vortex flow meter 33 is provided on the second test pipeline 31. The second vortex flow meter 33 is located at the front end of the installation position and is used to read the air flow in the second test pipeline 31.

[0040] According to the present invention, the length of the second test line 31 satisfies the following relationship:

[0041] L2≥10D, L3=2D, L4≥10D, L5=2D;

[0042] Wherein, L2 is the distance between the front end of the second pressure gauge 32 and the connecting flange (not shown) provided at the upstream end of the second test pipeline 31, L3 is the distance between the front end of the second pressure gauge 32 and the mounting position, L4 is the distance between the rear end of the second pressure gauge 32 and the mounting position, L5 is the distance between the rear end of the second pressure gauge 32 and the end of the second test pipeline 31, and D is the diameter of the test tank 22.

[0043] In this embodiment, the connecting flange is located on the portion of the second test pipeline 31 between the installation position and the second vortex flow meter 33. That is, the distance from the front end of the second pressure gauge 32 to the connecting flange is not less than 10D. This effectively avoids the turbulence caused by the connecting flange. Figure 1 As shown, the upstream end of the connecting pipeline 6 is connected to the test tank 22, and the downstream end of the connecting pipeline 6 is connected to the second vortex flow meter 33. A pneumatic valve 8 is provided on the connecting pipeline 6. Preferably, the pneumatic valve 8 is located close to the test tank 22.

[0044] According to the present invention, the data acquisition and processing module 4 includes a data acquisition unit 41 and a workstation 42 connected to the data acquisition unit 4. Flow control valve 25, first vortex flow meter 26, anemometer 23, first pressure gauge 24, pneumatic valve 8, second vortex flow meter 33, and second pressure gauge 32 are respectively connected to the data acquisition unit 41 for signal transmission. These measuring elements can transmit their respective acquired data information to the data acquisition system 41 in real time, and then the workstation 42 converts the signals for real-time display.

[0045] According to the present invention, a method for testing the flow rate and pressure drop of a flame arrester is also provided, which uses the aforementioned flame arrester flow rate and pressure drop testing system 100. The method for testing the flow rate and pressure drop of a flame arrester is described in detail below.

[0046] First, the flame arrester flow and pressure drop test system 100 described above is provided. Before use, the power source 1 is turned off. Preparatory work is then performed, including zeroing the measuring components such as the first vortex flow meter 26, the second vortex flow meter 33, the anemometer 23, the first pressure gauge 24, and the second pressure gauge 32, and completing the connection of the test pipeline.

[0047] Next, the flow rate and pressure drop of the flame arrester at the pipe end were tested.

[0048] When conducting the flow and pressure drop test of the pipe-end flame arrester, the pipe-end flame arrester 5 to be tested is first installed on the test tank 22 in the first test module 2, and the pneumatic valve 8 set between the first test module 2 and the second test module 3 is closed. The flow and pressure drop test of the pipe-end flame arrester is then conducted through the first test module 2.

[0049] The specific testing process is as follows: Install the pipe-end flame arrester 5 onto the test tank 22, and connect it to the corresponding upper pipe interface 221 on the top cover 220. Seal all other pipe interfaces 221 on the top cover 220 with blind flanges and close the pneumatic valve 8. Simultaneously, ensure that the length L1 of the connecting pipe 222 below the pipe-end flame arrester 5 is ≤10D. Then, turn on the power source 1 (air compressor or fan) to supply air to the first test line 21 of the first test module 2 and the test tank 22. During this process, the air flow rate in the first test line 21 is controlled and adjusted by the flow control valve 25. The current air flow rate is read by the first vortex flow meter 26, and the wind speed in the test tank 22 is read by the anemometer 23. If the wind speed is greater than or equal to 0.5 m / s, the data is discarded, and the opening of the flow control valve 25 is reduced to ensure that the wind speed is less than 0.5 m / s, meeting the standard requirements. This achieves a constant air flow into the test tank 22. During the test, the first vortex flow meter 26 and the anemometer 23 transmit the measured data to the data acquisition system 41 in real time, which then converts the signals and displays them in real time via the workstation 42. Simultaneously, the first pressure gauge 24 reads the pressure difference between the test tank 22 and the external atmospheric pressure and transmits it to the data acquisition system 41 in real time, which then converts the signals and displays them in real time via the workstation 42. Once the flow rate and pressure signals measured by the first vortex flow meter 26 and the first pressure gauge 24 stabilize on the workstation 42, they are recorded, allowing the measurement of the pressure drop value of the pipe-end flame arrester 5 at that flow rate.

[0050] By gradually increasing or decreasing the airflow velocity as required, the pressure drop value of the pipe end flame arrester 5 at different flow rates can be measured.

[0051] Next, a flow rate and pressure drop test of the pipeline flame arrester was conducted.

[0052] When conducting the flow and pressure drop test of the pipeline flame arrester, first install the pipeline flame arrester 7 to be tested into the installation position in the second test module 3, remove the pipe end flame arrester 5 and seal the top cover 220 of the test tank 22, open the pneumatic valve 8, and conduct the flow and pressure drop test of the pipeline flame arrester through the second test module 3.

[0053] The specific testing process is as follows: Install the pipeline flame arrester 7 onto the installation position of the second test pipeline 31, and seal all pipeline interfaces 221 on the top cover 220 of the test tank 22 with blind flanges. If the test tank 22 is connected to a pipe-end flame arrester 5, remove the pipe-end flame arrester 5 and seal the corresponding pipeline, and open the pneumatic valve 8. At the same time, ensure that the lengths of the pipelines before and after the pipeline flame arrester 7 meet the following conditions: L2≥10D, L3=2D, L4≥10D, L5=2D. Then turn on the power source 1 (air compressor or fan) to supply air to the first test pipeline 21, the test tank 22, and the second test pipeline 31. During this process, the air flow rate in the first test pipeline 21, the test tank 22, and the second test pipeline 31 is controlled and adjusted by the flow control valve 25. The current air flow rate is read by the first vortex flow meter 26 and the second vortex flow meter 33, and the measured data information is transmitted to the data acquisition system 41 in real time. Then, the workstation 42 converts the signal and displays it in real time. Simultaneously, the pressure difference across the flame arrester 7 in the pipeline is read by the second pressure gauge 32 and transmitted in real time to the data acquisition system 41. The signal is then converted and displayed in real time by the workstation 42. Once the flow rate and pressure signals measured by the second vortex flow meter 33 and the second pressure gauge 32 stabilize in the workstation 42, they are recorded, and the pressure drop value of the flame arrester 7 at that flow rate can be measured.

[0054] By gradually increasing or decreasing the airflow velocity as required, the pressure drop value of the flame arrester at the pipe end can be measured at different flow rates.

[0055] When testing the pipe-end flame arrester, shut off the pneumatic valve 8 to ensure stable airflow within the test tank 22, with a wind speed less than 0.5 m / s. When testing the pipeline flame arrester, open the pneumatic valve 8 and seal the top pipeline outlet of the test tank 22 with a blind flange to ensure that the airflow is buffered by the test tank 22 before stably entering the pipeline flame arrester test pipeline (second test pipeline), thereby minimizing errors.

[0056] The flow and pressure drop testing system and method for flame arresters according to the present invention can separately perform flow and pressure drop tests on pipeline flame arresters 5 and pipe-end flame arresters 7, with a large adjustment range, high numerical accuracy, and small error in the flow-pressure drop correlation. Therefore, the same flow and pressure drop test system can be used for both pipe-end flame arresters 5 and pipeline flame arresters 7. While ensuring a large adjustment range, high numerical accuracy, and small error in the flow-pressure drop correlation, it effectively saves equipment floor space, increases equipment utilization, reduces unnecessary equipment additions, and effectively reduces safety hazards.

[0057] The following section provides a detailed description of the flame arrester flow rate and pressure drop testing system and method according to the present invention, based on flame arresters of specific dimensions at pipe ends and in pipelines.

[0058] Taking the flow and pressure drop test of a pipe end flame arrester with a nominal diameter of DN200 as an example, ensure that the air compressor or fan is in the off state before use.

[0059] Before testing, prepare the following: zero the measuring components, including the first vortex flow meter 26, the second vortex flow meter 33, the first pressure gauge 24, the second pressure gauge 32, and the anemometer 23, and complete the pipeline connection.

[0060] Install the DN200 pipe-end flame arrester onto the top cover 220 of the test tank 22, and adapt it to the corresponding pipe interface 221. Seal all other pipe interfaces on the top cover 220 with blind flanges. Close the pneumatic valve 8. Also note that the length L1 of the connecting pipe 222 below the pipe-end flame arrester should be ≤2m.

[0061] Then, turn on the air compressor or fan to supply air to the first test line 21 and the test tank 22.

[0062] The air flow rate in the first test pipeline 21 is controlled and adjusted by the flow control valve 25. The current air flow rate is read by the first vortex flow meter 26 and transmitted to the data acquisition system 41 in real time. The signal is then converted by the workstation and displayed in real time until the flow rate value of the workstation is stably displayed as 100 Nm3 / h.

[0063] Therefore, a constant flow of air enters the test tank 22, and the wind speed inside the test tank 22 is read by the anemometer 23. If the wind speed is greater than or equal to 0.5 m / s, the data is discarded, and the opening of the flow control valve 25 is reduced to ensure that the wind speed is less than 0.5 m / s until it meets the standard requirements.

[0064] The pressure difference between the test tank 22 and the external atmospheric pressure is read by the first pressure gauge 24 and transmitted in real time to the data acquisition system 41. The signal is then converted by the workstation 42 and displayed in real time until the pressure value displayed on the workstation 42 stabilizes, for example, at 50 Pa. The flow rate of 100 Nm3 / h and the pressure value of 50 Pa are recorded at this time.

[0065] By gradually increasing or decreasing the airflow velocity as required, the pressure drop of the flame arrester at the pipe end can be measured at different flow rates. For example, increase the opening of the flow control valve 25, repeat the above steps, and control the flow rate to stabilize at 200 Nm³ / h. Record the stable pressure value at this time, assuming it is 280 Pa. Increase the opening of the flow control valve 25, repeat the above steps, and control the flow rate to stabilize at 300 Nm³ / h. Record the stable pressure value at this time, assuming it is 800 Pa.

[0066] Once the test is complete, the flow rate and pressure drop curves of the DN200 pipe-end flame arrester can be plotted based on the pressure drop values ​​corresponding to different flow rates.

[0067] Taking the flow and pressure drop test of a pipeline flame arrester with a nominal flange size of DN100 as an example, ensure that the air compressor or fan is in the off state before use.

[0068] Before testing, prepare the following: zero the measuring components, including the first vortex flow meter 26, the second vortex flow meter 33, the first pressure gauge 24, the second pressure gauge 32, and the anemometer 23, and complete the pipeline connection.

[0069] Install the DN100 pipe-end flame arrester into the mounting position in the second test pipeline 31, and seal all pipe joints 221 on the top cover 220 with blind flanges. Open the pneumatic valve 8. At the same time, ensure that the pipeline lengths before and after the pipeline flame arrester 7 meet the following conditions: L2≥10D, L3=2D, L4≥10D, L5=2D.

[0070] Then turn on the power source 1 (air compressor or fan) to supply air to the first test line 21, the test tank 22 and the second test line 31.

[0071] The airflow velocity in the first test pipeline 21, test tank 22, and second test pipeline 31 is controlled and adjusted by the flow control valve 25. The current airflow is read by the first vortex flow meter 26 and the second vortex flow meter 33, and the measured data is transmitted to the data acquisition system 41 in real time. The signal is then converted by the workstation 42 and displayed in real time until the flow rate value displayed by the workstation 42 is stable at 100 Nm3 / h.

[0072] Simultaneously, the pressure difference before and after the flame arrester 7 in the pipeline is read by the second pressure gauge 32 and transmitted in real time to the data acquisition system 41. The signal is then converted and displayed in real time by the workstation 42. This continues until the pressure value displayed on the workstation 42 stabilizes, for example, at 300 Pa, and the flow rate of 100 Nm3 / h and the pressure value of 300 Pa are recorded at this time.

[0073] By gradually increasing or decreasing the airflow velocity as required, the pressure drop of the pipeline flame arrester at different flow rates can be measured. For example, increase the opening of the flow control valve 25, repeat the above steps, and control the flow rate to stabilize at 200 Nm³ / h. Record the stable pressure value at this time, for example, 780 Pa. Increase the opening of the flow control valve 25, repeat the above steps, and control the flow rate to stabilize at 300 Nm³ / h. Record the stable pressure value at this time, for example, 1300 Pa.

[0074] Once the test is complete, the flow rate and pressure drop curves of the DN100 pipeline flame arrester can be plotted based on the pressure drop values ​​corresponding to different flow rates.

[0075] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A flame arrester flow rate and pressure drop testing system, comprising: A power source (1) for providing gas; A first test module (2) for testing the flow rate and pressure drop of a pipe-end flame arrester, the first test module being connected to the power source; the first test module includes a first test line (21) connected to the power source and a test tank (22) connected in the first test line; A second test module (3) located downstream of the first test module (2) is used to test the flow rate and pressure drop of the pipeline flame arrester; the second test module is connected to the test tank (22) of the first test module; and The data acquisition and processing module (4) is used to acquire the corresponding measurement data of the first test module and the second test module, and can convert the measurement data for real-time display.

2. The flame arrester flow rate and pressure drop testing system according to claim 1, characterized in that, The power source is an air compressor or a fan.

3. The flame arrester flow rate and pressure drop testing system according to claim 1, characterized in that, The first test module includes: An anemometer (23), which is connected to the test tank and is used to read the wind speed inside the test tank; and a first pressure gauge (24), which is connected to the test tank and is used to read the pressure inside the test tank.

4. The flame arrester flow rate and pressure drop testing system according to claim 3, characterized in that, The top cover (220) of the test tank is provided with multiple pipe interfaces (221) of different diameters for connecting pipe end flame arresters (5) of different specifications and sizes. The flame arrester under test is connected to the pipe interface of the corresponding size through a suitable connecting pipe (222).

5. The flame arrester flow rate and pressure drop testing system according to claim 4, characterized in that, The length L1 of the connecting pipe and the diameter D of the test tank satisfy the following relationship: L1≤10D.

6. The flame arrester flow rate and pressure drop testing system according to any one of claims 3 to 5, characterized in that, A flow control valve (25) is provided on the first test pipeline. The flow control valve is located between the power source and the test tank and is used to control and adjust the air flow rate in the first test pipeline.

7. The flame arrester flow rate and pressure drop testing system according to claim 6, characterized in that, A first vortex flow meter (26) is also provided on the first test pipeline. The first vortex flow meter is located between the flow control valve and the test tank and is used to read the air flow in the first test pipeline.

8. The flame arrester flow rate and pressure drop testing system according to claim 7, characterized in that, The second test module includes: The second test line (31) is connected to the first test line via a connecting line (6); An installation location formed in the second test pipeline, the installation location being used to install the pipeline flame arrester (7) to be tested; and A second pressure gauge (32) is used to read the pressure difference between the two ends of the pipeline flame arrester. The two ends of the second pressure gauge are respectively connected to the second test pipeline and are located at the two ends of the pipeline flame arrester.

9. The flame arrester flow rate and pressure drop testing system according to claim 8, characterized in that, A second vortex flow meter (33) is provided on the second test pipeline. The second vortex flow meter is located at the front end of the installation position and is used to read the air flow in the second test pipeline.

10. The flame arrester flow rate and pressure drop testing system according to claim 9, characterized in that, The length of the second test pipeline satisfies the following relationship: L2≥10D, L3=2D, L4≥10D, L5=2D; Wherein, L2 is the distance between the front end of the second pressure gauge and the connecting flange at the upstream end of the second test pipeline, L3 and L4 are the distances between the front and rear ends of the second pressure gauge and the mounting position, respectively, and L5 is the distance between the rear end of the second pressure gauge and the end of the second test pipeline.

11. The flame arrester flow rate and pressure drop testing system according to claim 10, characterized in that, A pneumatic valve (8) is provided on the connecting pipeline, and the pneumatic valve is located near the test tank.

12. The flame arrester flow rate and pressure drop testing system according to claim 9, characterized in that, The data acquisition and processing module includes a data acquisition unit (41) and a workstation (42) connected to the data acquisition unit. The flow control valve, the first vortex flow meter, the anemometer, the first pressure gauge, the pneumatic valve, the second vortex flow meter, and the second pressure gauge are respectively connected to the data acquisition unit for transmitting the collected data information to the data acquisition unit in real time, and then the workstation converts the signal for real-time display.

13. A method for testing the flow rate and pressure drop of a flame arrester, comprising the following steps: Provide a flame arrester flow rate and pressure drop testing system according to any one of claims 1 to 12; Install the flame arrester (5) to be tested onto the test tank in the first test module, and close the pneumatic valve set between the first test module and the second test module. Perform the flow rate and pressure drop test of the flame arrester through the first test module. Install the pipeline flame arrester (7) to be tested into the mounting position in the second test module, remove the pipeline flame arrester and close the test tank, open the pneumatic valve, and perform the pipeline flame arrester flow and pressure drop test through the second test module. During the corresponding tests, the data acquisition and processing module collects, records, and processes the relevant measurement data.

Images