A gas flame response performance grading test apparatus and method for a flame detector

Abstract

A kind of gas flame response performance grading test equipment and method for flame detector, it is related to flame detector detection technical field, including dry road gas flow control device, branch gas flame generation device, dry road gas flow control device includes support platform, one side of support platform is equipped with first manual air valve, second manual air valve, one end of first manual air valve is connected with combustible gas cylinder by pipeline, one end of second manual air valve is connected with nitrogen gas cylinder by pipeline;Branch gas flame generation device includes branch gas flow control platform, flame platform, branch gas flow control platform is equipped with gas valve connected with dry road outlet gas pipeline, every outlet gas pipeline of gas valve is connected to corresponding flame generator respectively.The technical scheme of multiple flames and independent adjustment of each road, the size of flame can be adjusted in each road, and different number of flames can be ignited to form different fire levels to test the sensitivity of the detector to the flame response capability.

Description

Technical Field

[0001] This invention relates to the field of flame detector testing technology, and in particular to a gas flame response performance grading test device and method for flame detectors. Background Technology

[0002] As a key component of fire monitoring and alarm systems, flame detectors undergo continuous development and improvement in performance testing technology. Flame detectors detect and alarm on fires by detecting flame signals, such as the flicker frequency of the flame, the high temperature generated during combustion, and the various frequency bands of red / ultraviolet radiation emitted by the large amount of high-temperature gas generated by the flame. Currently, flame detectors are widely used in many fields such as petroleum, chemical, metallurgy, power, gas, warehousing, and transportation, aiming to prevent fire accidents by timely detecting flames.

[0003] Flame detectors primarily respond to specific wavelengths of electromagnetic radiation emitted by flames. For fires involving liquid combustion or other fires with strong flame radiation, flame detectors can quickly and accurately detect the presence of flames, thus issuing an alarm. These types of fires are often accompanied by visible flames and high temperatures, making the detection effect of flame detectors quite ideal. However, for gas fires, because gas combustion often does not produce visible flames or the flames are small, and the heat and radiation generated during combustion may also be relatively low, this presents certain challenges for flame detectors in detecting gas fires. In some cases, gas fires may proceed in a smoldering form without visible flames, in which case the detection effect of flame detectors will be significantly reduced.

[0004] Currently, domestic and international standards for evaluating the response sensitivity of flame detectors typically use liquid fuels such as alcohol and n-heptane as test flames. Research on test flames of typical gases such as methane and hydrogen is insufficient and incomplete. Test equipment and standardized testing methods for classifying and quantitatively simulating gas fires are still lacking.

[0005] Furthermore, traditional detection equipment uses only one gas nozzle. Even though the flame size can be controlled by adjusting the flow rate, the fixed nozzle diameter limits the flame size adjustment. Additionally, if there is only a single flame path, increasing the gas flow rate may result in a taller flame and more intense combustion, failing to meet the requirements for evaluating the response capability of flame detectors to small flames and initial fire conditions. Summary of the Invention

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a gas flame response performance grading test device and method for flame detectors. It adopts a technical solution of multiple flames and independent adjustment of each flame. The flame size of each flame can be adjusted, and different fire levels can be formed by igniting different numbers of flames to test the sensitivity of the detector to flame response capability.

[0007] To achieve the above objectives, the main technical solutions adopted by the present invention include: A gas flame response performance grading test device for flame detectors includes a main gas flow control device and a branch gas flame generating device. The main gas flow control device includes a support platform. A first manual gas valve and a second manual gas valve are located on one side of the support platform. One end of the first manual gas valve is connected to a combustible gas cylinder via a pipeline, and the other end is connected to a first explosion-proof electric gas valve via a pipeline. The other end of the first explosion-proof electric gas valve is connected to a three-way pipe via a pipeline. One end of the second manual gas valve is connected to a nitrogen cylinder via a pipeline, and the other end is connected to a second explosion-proof electric gas valve via a pipeline. The other end of the second explosion-proof electric gas valve is connected to a three-way pipe via a pipeline. The three-way pipe is connected to a third explosion-proof electric gas valve via a pipeline. A main gas flow control device is installed on the pipeline connecting the three-way pipe and the third explosion-proof electric gas valve. The third explosion-proof electric gas valve is connected at the other end to the main gas outlet pipeline; the branch gas flame generating device includes a branch gas flow control platform and a flame platform. The branch gas flow control platform is equipped with a gas distribution valve connected to the main gas outlet pipeline. Each pipeline on the gas distribution valve is equipped with a manual gas valve. Each gas outlet pipeline of the gas distribution valve is connected to the explosion-proof electric valve and gas flow meter of the branch, and then connected to the corresponding flame generator. The flame generator is set on the flame platform. Each flame generator is equipped with a gas nozzle, an optical flame monitor, an electric igniter, and a temperature sensor. The gas flow meter, explosion-proof electric gas valve, optical flame monitor, electric igniter, and temperature sensor on the main gas flow control device and the branch gas flame generating device are respectively connected to the control device.

[0008] Furthermore, the gas distribution valve has 9 gas distribution lines, each of which is equipped with a manual gas valve. Each gas distribution line is connected to a flame generator. The 9 flame generators are arranged in a 3×3 array on the flame platform, providing a test environment for multiple different flame combinations.

[0009] Furthermore, the support platform for the trunk gas flow control device is a rectangular box or frame.

[0010] Furthermore, the flame platform is fixedly installed above the gas flow control platform on the side away from the gas distribution valve, or the flame platform and the gas flow control platform are two separate box or rectangular frame structures that are close to or fixedly connected.

[0011] Furthermore, a gas nozzle is installed in the middle of the flame generator. An electric igniter is fixed on one side of the gas nozzle, and an optical flame monitor is fixed on the other side of the gas nozzle. A temperature sensor is installed on the side of the gas nozzle close to the gas flow control platform. When the side of the flame platform away from the gas flow control platform's gas supply pipeline is used as the observation surface, the electric igniter and temperature sensor are respectively installed on both sides of the gas nozzle. The area in front of the gas nozzle's observation surface is an open space, so that during testing, the flame detector under test can face the flame directly without any equipment obstructing it.

[0012] Furthermore, the vertical height of the flame platform is at least 35cm higher than that of the main gas flow control device and the branch gas flow control platform, so that during the test, the flame platform can completely block the main gas flow control device and the branch gas flow control platform in the detection direction of the flame detector under test.

[0013] Furthermore, the control device is an industrial computer with a display panel. The control device includes branch gas supply control modules connected to the explosion-proof electric valves of each branch, several flame generator control modules, each flame generator control module including a branch gas flow module connected to a branch gas flow meter, a nozzle temperature module connected to a branch temperature sensor, an ignition control module connected to an electric igniter, and a flame status display module connected to an optical flame monitor; the branch gas supply control modules are also connected to the temperature sensor and the optical flame monitor; it also includes a main circuit control module, which includes a main circuit gas flow module connected to a main circuit gas flow meter, a main circuit gas supply control module connected to the third explosion-proof electric valve, a combustible gas supply control module connected to the first explosion-proof electric valve, a nitrogen supply control module connected to the second explosion-proof electric valve, and a valve master control module connected to each explosion-proof electric valve of the main circuit and branches; the display panel is equipped with a gas flow display module, a temperature display module, a flame status display module, and touch screen switches connected to each gas supply control module, ignition control module, and valve master control module.

[0014] Furthermore, the control device is located on the housing of a piano stand.

[0015] The method for classifying the gas flame response performance of the flame detector using the aforementioned test equipment includes the following steps: Align the optical axis of the flame detector under test with the flame platform of the test equipment. In the detection direction of the flame detector, make the flame platform block the gas flow control platform of the main gas flow control device and the branch gas flame generator. Before the test begins, set up a curtain between the flame detector and the test equipment. Ignite the test equipment in the preset form through the control device and adjust the flow rate to meet the set flow rate through the manual gas valve. When the test equipment reaches the preset flame form and the flame is stable, remove the curtain and start timing. Observe the fire alarm response of the flame detector under test and record the alarm response time.

[0016] Furthermore, once the preset maximum response time is reached, the curtain is used to block the flame detector under test from the test equipment.

[0017] The beneficial effects of this invention are: 1. The gas flame response performance classification test equipment for flame detectors of the present invention can test the fire response performance of combustible gases, and provides a test equipment and method for quantitative testing of the classification of combustible gas flame response performance.

[0018] 2. The gas flame response performance grading test equipment for flame detectors of the present invention, in terms of structural design, ensures that the test flames it generates meet the standardization requirements. Specifically, within the field of view of the flame detector, only the flame platform area appears, without any obstruction or reflection interference from other equipment; the flame platform area has a regular structure, and the positions of each gas flame generator are clearly defined, which can realize the standardized description of the flame platform area presented within the field of view of the flame detector.

[0019] 3. The gas flame response performance grading test equipment for flame detectors of the present invention can quantitatively adjust and monitor the flow rate of combustible gas emitted from 9 gas nozzles, thereby achieving adjustment and control of the flame size emitted from the gas nozzles. This equipment can individually control the ignition or extinguishing of the flames emitted from the 9 gas nozzles, presenting combinations of different numbers or positions of flames from 1 to 9. By adjusting the flame size and ignition / extinguishing of each flame separately using the above method, different levels of test fire patterns can be achieved. This equipment adopts a multi-flame, independently adjustable technology, where the flame size of each flame can be adjusted, and different fire levels can be created by igniting different numbers of flames to test the sensitivity of the detector's flame response capability.

[0020] 4. The gas flame response performance grading test equipment for flame detectors of the present invention is designed with a nitrogen gas washing function for safety. It can remove any possible residual combustible gas in the combustible gas path through the nitrogen gas path, preventing backfire or explosion of the equipment during and after the test. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the gas flame response performance grading test equipment for flame detectors according to the present invention; Figure 2 for Figure 1 Enlarged schematic diagram of the flame generator in section A; Figure 3 This is a schematic diagram of the structure of the piano stand housing and the display panel of the present invention; Figure 4 This is a schematic diagram of the main view position when the test equipment of the present invention is used to test the flame detector under test; Figure 5 This is a top-view diagram of the test position when the flame detector under test is tested using the test equipment of the present invention; Figure 6 This is a schematic diagram of the display panel interface of the present invention.

[0022] In the diagram: 1. Main line support platform; 2. First manual gas valve; 3. Second manual gas valve; 4. First explosion-proof electric gas valve; 5. Second explosion-proof electric gas valve; 6. T-pipe; 7. Main line gas flow meter; 8. Third explosion-proof electric gas valve; 9. Branch line gas flow control platform; 10. Flame platform; 11. Gas distribution valve; 12. Flame generator; 13. Gas nozzle; 14. Electric igniter; 15. Optical flame monitor; 16. Temperature sensor; 17. Display panel; 18. Stand housing; 19. Flame detector under test; 20. Bracket; 21. Curtain. Detailed Implementation

[0023] To better explain and facilitate understanding of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] This invention provides a gas flame response performance grading test device for flame detectors, such as... Figure 1As shown, it includes a main gas flow control device and a branch gas flame generator. The main gas flow control device includes a main support platform 1. Specifically, the main support platform 1 can be a box or rectangular frame structure. Manual gas valves, explosion-proof electric valves, gas flow meters and connecting pipelines are installed on the upper surface of the main support platform 1. One side of the main road support platform 1 is equipped with a first manual gas valve 2 and a second manual gas valve 3. One end of the first manual gas valve 2 is connected to a combustible gas cylinder via a gas hose, and the other end is connected to a first explosion-proof electric gas valve 4 via a pipeline. The other end of the first explosion-proof electric gas valve 4 is connected to a three-way pipe 6 via a pipeline. One end of the second manual gas valve 3 is connected to a nitrogen cylinder via a gas hose, and the other end is connected to a second explosion-proof electric gas valve 5 via a pipeline. The other end of the second explosion-proof electric gas valve 5 is connected to a three-way pipe 6 via a pipeline. The three-way pipe 6 is connected to a third explosion-proof electric gas valve 8 via a pipeline. A main road gas flow meter 7 is installed on the pipeline connecting the three-way pipe 6 and the third explosion-proof electric gas valve 8. The other end of the third explosion-proof electric gas valve 8 is connected to the main road outlet pipeline. The above-mentioned connecting pipelines can be stainless steel gas pipelines. The first explosion-proof electric gas valve 4, the second explosion-proof electric gas valve 5, the third explosion-proof electric gas valve 8, and the main gas flow meter 7 are connected to the control device via communication cables. The control device receives and displays the gas flow information from the main gas flow meter 7. The control device can control the opening and closing of the first explosion-proof electric gas valve 4, the second explosion-proof electric gas valve 5, and the third explosion-proof electric gas valve 8 to control the on / off state of the corresponding gas circuits. Operators can manually open or close the supply of combustible gas and nitrogen via the first manual gas valve 2 and the second manual gas valve 3, and can manually adjust the flow rate of combustible gas and nitrogen.

[0025] The branch gas flame generating device includes a branch gas flow control platform 9 and a flame platform 10. The branch gas flow control platform 9 and flame platform 10 can be box-like or rectangular frame structures. The flame platform 10 is fixedly installed above the branch gas flow control platform 9 on the side away from the gas distribution valve. Alternatively, the flame platform 10 and branch gas flow control platform 9 can be two separate box-like or rectangular frame structures that are close to or fixedly connected. The vertical height of the flame platform 10 must be at least 35cm higher than the vertical height of the main gas flow control device and the branch gas flow control platform 9, so that during testing, in the detection direction of the flame detector, the flame platform 10 can completely block the main gas flow control device and the branch gas flow control platform 9, ensuring that there are no objects obstructing the flame detector and the flame platform 10.

[0026] The branch gas flow control platform 9 is equipped with a gas distribution valve 11 connected to the main gas outlet pipeline. Each pipeline on the gas distribution valve 11 is equipped with a manual gas valve. Each outlet pipeline of the gas distribution valve 11 is connected to the explosion-proof electric valve and gas flow meter of the branch, and then connected to the gas nozzle 13 of the corresponding flame generator 12. The connecting pipelines can be stainless steel gas pipelines. Specifically, the gas distribution valve 11 has 9 gas distribution pipelines, each of which is equipped with a manual gas valve. Each gas distribution pipeline is connected to a flame generator 12. The 9 flame generators 12 are arranged in a 3×3 array on the flame platform, providing a test environment for multiple different flame combinations.

[0027] Flame generator 12 is mounted on flame platform 10, such as Figure 2 As shown, each flame generator 12 is equipped with a gas nozzle 13, an optical flame monitor 15, an electronic igniter 14, and a temperature sensor 16. Specifically, a gas nozzle 13 is located in the middle of the flame generator 12. An electronic igniter 14 is fixed on one side of the gas nozzle 13, and an optical flame monitor 15 is fixed on the other side of the gas nozzle 13. The temperature sensor 16 is located on the side of the gas nozzle 13 closest to the gas flow control platform. When the side of the flame platform 10 away from the gas supply pipeline of the branch gas flow control platform 9 is used as the observation surface, the electronic igniter 14 and the temperature sensor 16 are respectively located on both sides of the gas nozzle 13. The area in front of the observation surface of the gas nozzle 13 is an open space, so that the flame detector 19 under test can face the flame directly without any equipment obstructing the view during the test.

[0028] The gas flow meter, explosion-proof electric gas valve, optical flame detector 15 of flame generator 12, electric igniter 14, and temperature sensor 16 on the branch gas flame generator are connected to the control device via communication cables. The control device controls the opening and closing of the electric gas valve and the activation of the electric igniter through electronic switches. The control device displays the temperature, flow rate, and flame status, and the gas flow rate of the branch can be manually adjusted through the manual gas valve.

[0029] Specifically, the control device is an industrial computer with a display panel 17. The control device includes branch gas supply control modules connected to the explosion-proof electric valves of each branch. Nine branch gas supply control modules are provided for each of the nine branches, and corresponding electronic touchscreen switches are provided on the display panel 17 to control the opening and closing of the explosion-proof electric valves on each branch. It also includes nine flame generator control modules. Each flame generator control module includes a branch gas flow module connected to a branch gas flow meter, used to collect branch gas flow values ​​and display them on the display panel 17. It also includes a nozzle temperature module connected to a branch temperature sensor, used to collect temperature sensor values ​​and display them on the display panel 17. It also includes an ignition control module connected to an electronic igniter, used to control the activation of the electronic igniter via the electronic touchscreen switches on the display panel 17. Finally, it includes a flame status display module connected to an optical flame monitor, used to collect flame status data, i.e., to detect the presence or absence of a flame using the temperature sensor and the optical flame monitor, and display it on the display panel 17.

[0030] like Figure 6 As shown, display panel 17 displays the gas flow rate values ​​for each branch, the temperature values ​​for each nozzle, and the flame status of each flame generator. The flame status is displayed as either "flame present" or "flame absent." When the temperature sensor and optical flame monitor detect a flame, display panel 17 displays a flame indicator; when neither detects a flame, the corresponding flame indicator on display panel 17 is extinguished. The ignition control module has an electronic touchscreen switch button on display panel 17 for controlling ignition. The branch gas supply control module is also connected to the temperature sensor and optical flame monitor. If the flame is unexpectedly extinguished during the test, the control device detects the extinguishment via the optical flame monitor or temperature sensor and automatically closes the explosion-proof electric gas valve of that branch to cut off the gas supply and prevent leakage. If necessary, gas supply and ignition can be restored to that branch via the electronic touchscreen switch button on display panel 17.

[0031] The control device also includes a trunk control module, which includes a trunk gas flow module connected to the trunk gas flow meter 7, used to collect the values ​​of the trunk gas flow meter 7 and display them on the display panel.

[0032] It also includes a main gas supply control module connected to the third explosion-proof electric valve, used to control the opening and closing of the third explosion-proof electric valve via electronic touch screen switches on the display panel 17. It also includes a combustible gas supply control module connected to the first explosion-proof electric valve, used to control the opening and closing of the first explosion-proof electric valve via electronic touch screen switches on the display panel 17. Finally, it includes a nitrogen supply control module connected to the second explosion-proof electric valve, used to control the opening and closing of the second explosion-proof electric valve via electronic touch screen switches on the display panel 17.

[0033] It also includes a valve master control module connected to each explosion-proof electric valve in the main and branch lines, which is used to control all explosion-proof electric valves to close with one click via the electronic touch screen switch button on the display panel 17.

[0034] The display panel 17 includes a gas flow display module, a temperature display module, a flame status display module, and electronic touch screen switches connected to various gas supply control modules, ignition control modules, and valve master control modules. Specifically, the control device can be mounted on a piano stand housing 18, such as... Figure 3 As shown.

[0035] The method of using the gas flame response performance grading test equipment for flame detectors of the present invention is as follows: Before the test, all gas valves in the main and branch lines were closed. At the start of the test, the first manual gas valve 2 and the second manual gas valve 3 of the main line were manually opened, and the manual gas valve on the branch line distribution valve 11 was opened. The first explosion-proof electric gas valve 4 and the third explosion-proof electric gas valve 8 were then activated via the electronic touchscreen switch buttons on the display panel 17 to supply combustible gas to the main line. Then, according to the pre-set flame pattern, the gas supply and ignition of each branch line were activated via the electronic touchscreen switch buttons on the display panel 17. During this process, the nitrogen gas path remained closed.

[0036] In the event of a sudden, unexpected flameout, the control device detects the flame extinguishing via an optical flame detector or temperature sensor and automatically shuts off the explosion-proof electric gas valve for that branch to cut off the gas supply and prevent leakage. If re-ignition of that branch is required, the gas supply and ignition can be restarted via the electronic touchscreen switch on the display panel 17.

[0037] At the end of the test, all explosion-proof electric gas valves are shut off with a single button press on the electronic touchscreen switch on display panel 17, disconnecting the entire gas circuit. An optical flame detector and temperature sensor monitor whether all flames in each circuit have been extinguished. After all flames are extinguished, the second explosion-proof electric gas valve 5, the third explosion-proof electric gas valve 8, and the explosion-proof electric gas valves of each branch circuit can be opened using the electronic touchscreen switch on display panel 17 to purge the entire gas circuit with nitrogen, preventing the risk of explosion from residual flammable gases.

[0038] The method for classifying the gas flame response performance of a flame detector using the test equipment described in this invention includes the following steps: like Figure 4 , 5As shown, the optical axis of the flame detector 19 under test is aligned with the flame platform of the test equipment. In the detection direction of the flame detector, the flame platform is used to block the gas flow control platform of the main gas flow control device and the branch gas flame generator. Before the test begins, a curtain 21 is placed between the flame detector and the test equipment. The test equipment is ignited in a preset manner through the control device, and the flow rate is adjusted to meet the set flow rate through the manual gas valve. When the test equipment reaches the preset flame form and the flame is stable, the curtain 21 is removed and the timing is started. The fire alarm response of the flame detector 19 under test is observed and the alarm response time is recorded.

[0039] The detailed steps are as follows: Step 1: Arrange the test equipment of the present invention at the center of the ground at one end of the combustion laboratory, maintaining a certain safe distance from the background wall. Mount the flame detector 19 sample (hereinafter referred to as the sample) on the bracket 20, with the sample 1.5m above the ground and ensuring that the optical axis of the sample is directly facing the test equipment of the present invention. Position the flame platform area of ​​the branch gas flame generating device of the test equipment of the present invention directly opposite the sample, ensuring that the branch gas flow control area and the main gas flow control device of the branch gas flame generating device are completely obscured by the "flame platform area" within the sample's field of view. The control device is arranged outside the sample's field of view and connected to the branch gas flame generating device and the main gas flow control device via a sufficiently long communication cable. Place a curtain 21 between the sample and the equipment, ensuring that the curtain 21 completely obscures the equipment within the sample's field of view.

[0040] Step 2: Ignite the test equipment of the present invention according to the preset flame type level (ignition nozzle combination type, combustible gas flow rate value of each nozzle), display the gas flow rate value on the control device through the gas flow meter corresponding to each gas path, monitor whether the gas flow rate of each gas path meets the set requirements, and adjust the flow rate of the corresponding gas path through each manual gas valve until the set requirements are met.

[0041] Step 3: Once the test equipment of this invention reaches the preset flame pattern and the flame is stable, remove the curtain 21 between the sample and the equipment and start timing. Observe the fire alarm response of the sample and record the alarm response time. When the timer reaches the preset maximum response time, re-cover the equipment and the sample with the curtain 21. If the sample does not issue a fire alarm during the above test, it is determined to be non-compliant with the fire response requirements of this level of test.

[0042] Step 4: Adjust the test equipment of the present invention to another pre-set flame type level (ignition nozzle combination type, combustible gas flow rate value of each nozzle) according to the method in Step 2, re-ignite, and determine the conformity of the sample's test fire response to this level according to the method in Step 3. Continue in this manner until the testing of all pre-set flame type levels is completed.

[0043] The test equipment of this invention adopts a technical solution of multiple flames and independent adjustment of each flame. The size of each flame can be adjusted, and different fire levels can be formed by igniting different numbers of flames to test the sensitivity of the detector to the flame response capability.

[0044] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any modifications, alterations, substitutions, and variations made by those skilled in the art to the above embodiments are within the scope of the present invention.

Claims

1. A gas flame response performance grading test device for flame detectors, characterized in that, The system includes a main gas flow control device and a branch gas flame generator. The main gas flow control device includes a support platform. A first manual gas valve and a second manual gas valve are located on one side of the support platform. One end of the first manual gas valve is connected to a combustible gas cylinder via a pipeline, and the other end is connected to a first explosion-proof electric gas valve via a pipeline. The other end of the first explosion-proof electric gas valve is connected to a three-way pipe via a pipeline. One end of the second manual gas valve is connected to a nitrogen cylinder via a pipeline, and the other end is connected to a second explosion-proof electric gas valve via a pipeline. The other end of the second explosion-proof electric gas valve is connected to a three-way pipe via a pipeline. The three-way pipe is connected to a third explosion-proof electric gas valve via a pipeline. A main gas flow meter is installed on the pipeline connecting the three-way pipe and the third explosion-proof electric gas valve. The other end of the third explosion-proof electric gas valve... The branch gas flame generator is connected to the main gas outlet pipeline. The branch gas flame generator includes a branch gas flow control platform and a flame platform. The branch gas flow control platform is equipped with a gas distribution valve connected to the main gas outlet pipeline. Each pipeline on the gas distribution valve is equipped with a manual gas valve. Each gas outlet pipeline of the gas distribution valve is connected to the explosion-proof electric valve and gas flow meter of the branch, and then connected to the corresponding flame generator. The flame generator is set on the flame platform. Each flame generator is equipped with a gas nozzle, an optical flame monitor, an electric igniter, and a temperature sensor. The gas flow meter, explosion-proof electric valve, optical flame monitor, electric igniter, and temperature sensor on the main gas flow control device and the branch gas flame generator are respectively connected to the control device.

2. The gas flame response performance grading test equipment for flame detectors according to claim 1, characterized in that: The gas distribution valve has 9 gas distribution lines. Each gas distribution line is equipped with a manual gas valve. Each gas distribution line is connected to a flame generator. The 9 flame generators are arranged in a 3×3 array on the flame platform.

3. The gas flame response performance grading test equipment for flame detectors according to claim 1, characterized in that: The support platform for the main gas flow control device is a rectangular box or frame.

4. The gas flame response performance grading test equipment for flame detectors according to claim 1, characterized in that: The branch gas flow control platform of the branch gas flame generator is a rectangular box or frame. The flame platform is fixedly installed above the side of the gas flow control platform away from the gas distribution valve. Alternatively, the flame platform and the branch gas flow control platform are two separate box or rectangular frame structures that are close to or fixedly connected.

5. The gas flame response performance grading test equipment for flame detectors according to claim 1, characterized in that: A gas nozzle is installed in the middle of the flame generator. An electric igniter is fixed on one side of the gas nozzle, and an optical flame monitor is fixed on the other side of the gas nozzle. A temperature sensor is installed on the side of the gas nozzle that is close to the gas flow control platform. When the side of the flame platform that is far away from the gas flow control platform and the gas supply pipeline is used as the observation surface, the electric igniter and the temperature sensor are respectively installed on both sides of the gas nozzle. The area in front of the observation surface of the gas nozzle is an open space.

6. The gas flame response performance grading test equipment for flame detectors according to claim 1, characterized in that: The vertical height of the flame platform is at least 35cm higher than that of the main gas flow control device and the branch gas flow control platform.

7. The gas flame response performance grading test equipment for flame detectors according to claim 1, characterized in that: The control device is an industrial computer with a display panel. It includes branch gas supply control modules connected to the explosion-proof electric valves of each branch, several flame generator control modules, each flame generator control module including a branch gas flow module connected to a branch gas flow meter, a nozzle temperature module connected to a branch temperature sensor, an ignition control module connected to an electric igniter, and a flame status display module connected to an optical flame monitor. The branch gas supply control modules are also connected to the temperature sensor and the optical flame monitor. It also includes a main circuit control module, which includes a main circuit gas flow module connected to a main circuit gas flow meter, a main circuit gas supply control module connected to a third explosion-proof electric valve, a combustible gas supply control module connected to a first explosion-proof electric valve, and a nitrogen supply control module connected to a second explosion-proof electric valve. It also includes a valve master control module connected to the explosion-proof electric valves of the main circuit and branches. The display panel includes a gas flow display module, a temperature display module, a flame status display module, and touch screen switches connected to each gas supply control module, ignition control module, and valve master control module.

8. A gas flame response performance grading test device for a flame detector according to claim 1, characterized in that: The control device is located on the housing of a piano stand.

9. A method for classifying the gas flame response performance of a flame detector using any one of the test devices described in claims 1-8, characterized in that, Includes the following steps: Align the optical axis of the flame detector under test with the flame platform of the test equipment. In the detection direction of the flame detector, make the flame platform block the gas flow control platform of the main gas flow control device and the branch gas flame generator. Before the test begins, set up a curtain between the flame detector and the test equipment. Ignite the test equipment in the preset form through the control device and adjust the flow rate to meet the set flow rate through the manual gas valve. When the test equipment reaches the preset flame form and the flame is stable, remove the curtain and start timing. Observe the fire alarm response of the flame detector under test and record the alarm response time.

10. The method for grading the gas flame response performance of a flame detector according to claim 9, characterized in that: Once the preset maximum response time is reached, the curtain will block the flame detector under test from the test equipment.

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