Verification device and verification method for channel synchronism of fire extinguishing agent concentration measurement device

Abstract

The invention provides a verification device and a verification method for channel synchronism of a fire extinguishing agent concentration measuring device, the verification device is connected with the fire extinguishing agent concentration measuring device (31) through a plurality of sampling pipes (20), and the verification device comprises a fire extinguishing agent standard gas cylinder (11), a pressure reducer (12), a pressure regulating valve (13), a switch valve (14), a ventilation tank (15) and a flow divider (16) which are connected in sequence, fire extinguishing agent standard gas is stored in the fire extinguishing agent standard gas cylinder, the pressure reducer and the pressure regulating valve regulate the fire extinguishing agent standard gas to a specific air pressure, the switch valve releases and blocks the fire extinguishing agent standard gas regulated to the specific air pressure, a plurality of vent holes communicated with external air are formed in the ventilation tank, and the flow divider evenly divides gas from the ventilation tank. And a plurality of sampling pipes are respectively connected to a plurality of channels of the fire extinguishing agent concentration measuring device.

Description

Technical Field

[0001] The present invention relates to the field of aircraft flight tests, and more particularly to a verification device and a verification method for the channel synchronization of a fire extinguishing agent concentration measuring device. Background Art

[0002] Currently, in aircraft flight test experiments, it is necessary to obtain the volume concentration of the fire extinguishing agent at measurement points such as in the engine compartment and the APU compartment after the fire extinguishing system releases the fire extinguishing agent (for example, Article 5.3.2.2 of GJB3275A-2022 "Requirements for Installation and Test of Aircraft Fire Extinguishing Systems" stipulates that for the fire extinguishing agent concentration (b) of high-rate fixed fire extinguishing systems, when using Halon 1301 fire extinguishing agent, the volume concentration of the fire extinguishing agent formed in all parts of its action area after spraying should be at least 6%) and the duration (in all parts of its action area, the duration of this fire extinguishing agent concentration should be not less than 0.5 s) to evaluate the fire extinguishing performance of the aircraft fire extinguishing system. At this time, a fire extinguishing agent concentration measuring device is often required. The inside of this device has multiple channels for the fire extinguishing agent gas to flow through, so as to collect the fire extinguishing agent gas at each measurement point and measure its concentration. In order to truly reflect the volume concentration of the fire extinguishing agent gas at the measured point, the sampling tubes are connected to the inlets of the respective channels of the fire extinguishing agent concentration measuring device one by one.

[0003] The volume concentration of the fire extinguishing agent gas in the engine compartment and the APU compartment changes with time. Therefore, when collecting and measuring the fire extinguishing agent gas therein, it is necessary to simultaneously aspirate the fire extinguishing agent gas at each measurement point. Therefore, it is required that the channels through which the fire extinguishing agent gas passes are synchronous.

[0004] However, up to now, when the fire extinguishing agent concentration measuring device is used normally, it is impossible to verify the channel synchronization of the fire extinguishing agent concentration measuring device from the fire extinguishing agent concentration measurement data. Moreover, no device and method for verifying the channel synchronization of the fire extinguishing agent concentration measuring device have been disclosed in domestic and foreign patent literatures. Summary of the Invention

[0005] The present invention is completed in view of the above technical problems, and its purpose is to provide a verification device and a verification method for the channel synchronization of a fire extinguishing agent concentration measuring device, which can verify the channel synchronization of multiple channels of the fire extinguishing agent concentration measuring device.

[0006] To achieve the above object, a verification device for the channel synchronization of a fire extinguishing agent concentration measuring device according to a first aspect of the present invention is connected to the fire extinguishing agent concentration measuring device via a plurality of sampling tubes, and includes a fire extinguishing agent calibration gas cylinder, a pressure reducer and a pressure regulating valve, a switching valve, a ventilation tank, and a flow divider that are connected in sequence. The fire extinguishing agent calibration gas cylinder stores fire extinguishing agent calibration gas. The pressure reducer and the pressure regulating valve regulate the fire extinguishing agent calibration gas to a specific pressure. The switching valve releases and blocks the fire extinguishing agent calibration gas that has been regulated to a specific pressure. The ventilation tank is formed with a plurality of ventilation holes communicating with external air. The flow divider evenly divides the gas from the ventilation tank and is respectively connected to a plurality of channels of the fire extinguishing agent concentration measuring device via the plurality of sampling tubes.

[0007] According to the above structure, by connecting the verification device for the channel synchronization of the fire extinguishing agent concentration measuring device to the fire extinguishing agent concentration measuring device, the channel synchronization of the fire extinguishing agent concentration measuring device can be verified. In other words, the channel synchronization of the fire extinguishing agent concentration measuring device can be verified through a simple operation.

[0008] The verification device for the channel synchronization of the fire extinguishing agent concentration measuring device according to a second aspect of the present invention is based on the verification device for the channel synchronization of the fire extinguishing agent concentration measuring device according to the first aspect of the present invention. The flow divider is in a cylindrical shape, and is provided with an air inlet hole at the center of the bottom and a plurality of air outlet holes evenly arranged circumferentially around the center of the top.

[0009] According to the above structure, the fire extinguishing agent calibration gas from the fire extinguishing agent calibration gas cylinder can be evenly divided into each sampling tube through the flow divider, so that the channel synchronization of each sampling tube can be accurately measured.

[0010] The third aspect of the present invention provides a method for verifying the channel synchronization of a fire extinguishing agent concentration measuring device, which is implemented by the verification device for the channel synchronization of the fire extinguishing agent concentration measuring device according to the first aspect or the second aspect, and includes: the step of sequentially connecting the verification device for the channel synchronization of the fire extinguishing agent concentration measuring device according to the first aspect or the second aspect to the fire extinguishing agent concentration measuring device, the vacuum pump, and the fire extinguishing agent collection device; the step of powering on the fire extinguishing agent concentration measuring device and starting preheating; the step of detecting that the fire extinguishing agent concentration measuring device reaches a preset temperature and the preheating is completed; the step of opening the fire extinguishing agent standard gas cylinder and adjusting the pressure reducer and the pressure regulating valve to adjust the fire extinguishing agent standard gas from the fire extinguishing agent standard gas cylinder to a standard atmospheric pressure; the step of closing the switch valve and driving the vacuum pump to suck external air into the fire extinguishing agent concentration measuring device until the pressure difference generated by the external air flowing through the fire extinguishing agent concentration measuring device reaches a stable reference pressure difference; the step of opening the switch valve to release the fire extinguishing agent standard gas, observing the time difference of the fire extinguishing agent concentration measurement values in each channel of the fire extinguishing agent concentration measuring device reaching a specific concentration, and verifying the channel synchronization of each channel according to the time difference; and the step of powering off the fire extinguishing agent concentration measuring device and withdrawing it.

[0011] According to the above verification method, by only connecting the verification device for the channel synchronization of the fire extinguishing agent concentration measuring device to the fire extinguishing agent concentration measuring device and observing the time difference of the fire extinguishing agent concentration measurement values in each channel of the fire extinguishing agent concentration measuring device reaching a specific concentration, the channel synchronization of the fire extinguishing agent concentration measuring device can be verified. In this way, the verification of the channel synchronization of the fire extinguishing agent concentration measuring device can be achieved through simple operations.

[0012] Based on the method for verifying the channel synchronization of the fire extinguishing agent concentration measuring device according to the third aspect, in the case where the fire extinguishing agent is Halon 1301 fire extinguishing agent, the specific concentration is 6%.

[0013] According to the above method, in the case where the fire extinguishing agent is Halon 1301 fire extinguishing agent, the specific concentration is 6%. Therefore, the time difference of the fire extinguishing agent concentration measurement values reaching this specific concentration in each channel of the fire extinguishing agent concentration measuring device can be detected relatively quickly, and the synchronization of the fire extinguishing agent concentration measuring device reaching the required fire extinguishing agent concentration of 6% can be verified relatively accurately. Description of the Drawings

[0014] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0015] Figure 1 It is a schematic diagram showing the form in which the verification device for the channel synchronization of the fire extinguishing agent concentration measuring device according to the first embodiment of the present invention is connected to the fire extinguishing agent concentration measuring device.

[0016] Figure 2A and Figure 2B are respectively schematic diagrams obtained by observing the flow divider 16 from both axial sides.

[0017] Figure 3 It shows Figure 1 the verification method of the channel synchronization realized by the verification device for the channel synchronization of the fire extinguishing agent concentration measuring device shown.

[0018] (Symbol description)

[0019] 10 Verification device for the channel synchronization of the fire extinguishing agent concentration measuring device;

[0020] 11 Fire extinguishing agent standard gas cylinder;

[0021] 12 Pressure reducer;

[0022] 13 Pressure regulating valve;

[0023] 14 Switch valve;

[0024] 15 Ventilation tank;

[0025] 16 Flow divider;

[0026] 20 Sampling tube;

[0027] 31 Fire extinguishing agent concentration measuring device;

[0028] 311 First channel;

[0029] 312 Second channel;

[0030] 313 Third channel;

[0031] 314 Fourth channel;

[0032] 315 Fifth channel;

[0033] 316 Sixth channel;

[0034] 317 Seventh channel;

[0035] 318 The eighth channel;

[0036] 319 The ninth channel;

[0037] 31A The tenth channel;

[0038] 31B The eleventh channel;

[0039] 31C The twelfth channel;

[0040] 32 Vacuum pump;

[0041] 33 Fire extinguishing agent collection device. Detailed implementation mode

[0042] Hereinafter, with reference to Figures 1 to 3 A verification device for the channel synchronization of a fire extinguishing agent concentration measuring device according to a first embodiment of the present invention and a verification method implemented by the verification device will be described in detail. Figure 1 It is a schematic diagram showing a form in which a verification device for the channel synchronization of a fire extinguishing agent concentration measuring device according to a first embodiment of the present invention is connected to the fire extinguishing agent concentration measuring device. Figure 2A And Figure 2B They are respectively schematic diagrams of the diverter 16 observed from both axial sides. Figure 3 It shows the Figure 1 Channel synchronization verification method implemented by the verification device for the channel synchronization of the fire extinguishing agent concentration measuring device shown.

[0043] (First embodiment)

[0044] In Figure 1 It shows a form in which a verification device for the channel synchronization of a fire extinguishing agent concentration measuring device according to a first embodiment of the present invention is connected to the fire extinguishing agent concentration measuring device. As Figure 1 shown, the verification device 10 for the channel synchronization of the fire extinguishing agent concentration measuring device according to the first embodiment of the present invention is configured to include: a fire extinguishing agent calibration gas cylinder 11, which stores fire extinguishing agent calibration gas inside; a pressure reducer 12 and a pressure regulating valve 13, which are sequentially connected to the downstream side of the fire extinguishing agent calibration gas cylinder 11 via pipelines; a switching valve 14, which is connected to the downstream side of the pressure regulating valve 13 via a pipeline; an air storage tank 15, which is connected to the downstream side of the switching valve 14 via a pipeline and is formed with 40 air vent holes 151 communicating with the external air; a diverter 16, which is cylindrical and is connected to the downstream side of the air storage tank 15 via a pipeline. As Figure 2A shown, a vent hole is opened at the center of the bottom connected to the air storage tank 15 as an intake hole 161, and 12 vent holes of the same size and shape are evenly opened circumferentially around the center of the top connected to the diverter 16 as outlet holes 162. As Figure 2AAs shown, the air inlet hole 161 is located at the center of the circular bottom of the diverter 16, and twelve air outlet holes 162 surround the air inlet hole 161 to form a circle. The sampling tubes 20 are identical in shape and arranged side by side.

[0045] In the verification device 10 for the channel synchronism of the fire extinguishing agent concentration measuring device configured as described above, the twelve (the number is the same as the total number of channels of the fire extinguishing agent concentration measuring device) air outlet holes 162 of the diverter 16 are respectively connected to the inlets of the twelve sampling tubes 20, and the outlets of the respective sampling tubes 20 are connected to the inlets of the twelve channels (the first channel 311, the second channel 312, the third channel 313, the fourth channel 314, the fifth channel 315, the sixth channel 316, the seventh channel 317, the eighth channel 318, the ninth channel 319, the tenth channel 31A, the eleventh channel 31B, the twelfth channel 31C) of the fire extinguishing agent concentration measuring device 31 via connection members (not shown).

[0046] In the above structure, by providing the ventilation tank 15 with forty ventilation holes 151 communicating with the external air, the pressure difference generated by the pressure difference medium in the fire extinguishing agent concentration measuring device 31 can be set to a stable reference pressure difference before introducing the fire extinguishing agent standard gas, and the fire extinguishing agent gas pressure in the fire extinguishing agent concentration measuring device 31 can be adjusted to one atmospheric pressure when introducing the fire extinguishing agent standard gas. In this way, the pressure of the fire extinguishing agent standard gas introduced into the fire extinguishing agent concentration measuring device 31 can be made the same as the external environmental pressure, preparing for accurately measuring the fire extinguishing agent concentration.

[0047] According to the above structure, by connecting the diverter 16 of the verification device 10 for the channel synchronism of the fire extinguishing agent concentration measuring device to the fire extinguishing agent concentration measuring device 31 via twelve sampling tubes 20 respectively, the channel synchronism of the fire extinguishing agent concentration measuring device 31 can be verified.

[0048] Specifically, the method for verifying the channel synchronism of the fire extinguishing agent concentration measuring device 31 in this embodiment is as Figure 3 shown:

[0049] Step S11: A step of sequentially connecting the verification device 10 for the channel synchronism of the fire extinguishing agent concentration measuring device, the fire extinguishing agent concentration measuring device 31, the vacuum pump 32, and the fire extinguishing agent collection device 33;

[0050] Step S12: A step of powering on the fire extinguishing agent concentration measuring device 31 and starting preheating;

[0051] Step S13: A step of detecting that the fire extinguishing agent concentration measuring device 31 reaches a preset temperature and the preheating is completed;

[0052] Step S14: Open the fire extinguishing agent standard gas cylinder 11 and adjust the pressure reducer 12 and pressure regulating valve 13 to adjust the fire extinguishing agent standard gas from the fire extinguishing agent standard gas cylinder 11 to a standard atmospheric pressure;

[0053] Step S15: Close the switch valve 14 and drive the vacuum pump 32 to suck external air into the fire extinguishing agent concentration measuring device 31 until the pressure difference generated by the external air flowing through the fire extinguishing agent concentration measuring device 31 reaches a stable reference pressure difference;

[0054] Step S16: Open the switch valve 14 to release the fire extinguishing agent standard gas, and observe the time difference △T when the fire extinguishing agent concentration measurement values in each channel of the fire extinguishing agent concentration measuring device 31 reach a specific concentration (for example, 6%);

[0055] Step S17: If the above-mentioned flow time difference △T ≤ 0.1 s, it can be judged that the flow times when the fire extinguishing agent concentration measurement values in each channel of the fire extinguishing agent concentration measuring device reach a specific concentration of 6% are close to the same, and the channel synchronization of each channel of the fire extinguishing agent concentration measuring device is qualified; if the above-mentioned flow time difference △T > 0.1 s, it can be judged that there are large differences in the flow times when the fire extinguishing agent gas in each channel of the fire extinguishing agent concentration measuring device reaches a concentration of 6%, and the channel synchronization of each channel is unqualified;

[0056] Step S18: Cut off the power supply of the fire extinguishing agent concentration measuring device 31 and withdraw it;

[0057] In the above step S16, a display unit is provided in the fire extinguishing agent concentration measuring device. The display unit can not only display the fire extinguishing agent concentration in real time, but also display the moment when this concentration is reached. Therefore, according to the above display unit, the values related to the fire extinguishing agent concentration and the time taken to reach this concentration can be intuitively obtained.

[0058] (Technical effects of the first embodiment)

[0059] According to the verification device and verification method for the channel synchronization of the fire extinguishing agent concentration measuring device according to the first embodiment of the present invention, it is possible to verify whether the channel synchronization of the fire extinguishing agent concentration measuring device is qualified.

[0060] Moreover, the above verification process can be completed only by a set of devices including the verification device 10 for the channel synchronization of the fire extinguishing agent concentration measuring device, the sampling tube 20, the fire extinguishing agent concentration measuring device 31, the vacuum pump 32, and the fire extinguishing agent collection device 33, that is, multiple operations can be realized with a simple structure and multiple functions can be achieved.

[0061] The verification device 10 for the channel synchronization of the fire extinguishing agent concentration measurement device of this embodiment can be applied to the ground test for verifying the synchronization of the fire extinguishing agent concentration measurement device itself. In this test, the lengths and shapes of the sampling tubes 20 connecting the verification device 10 and the 12 channels of the fire extinguishing agent concentration measurement device are the same.

[0062] In addition, even when it is required that the lengths of the 12-channel sampling tubes be the same during actual installation, the shapes of the 12-channel sampling tubes 20 connected to the fire extinguishing agent concentration measurement device 31 are not completely the same due to the different spatial positions of the measurement points in the engine compartment or the APU compartment. When the shapes of the 12-channel sampling tubes 20 connecting the above verification device 10 and the fire extinguishing agent concentration measurement device 31 are not completely the same, the sampling tubes 20 are connected through the fire extinguishing agent standard gas cylinder 11, the pressure reducer 12, the pressure regulating valve 13, the switching valve 14, the ventilation tank 15, the shunt 16, and the equal-length pipelines connected to the ports of the shunt 16 and each sampling tube 20. Also, by observing the time difference △T when the measured values of the fire extinguishing agent concentration in each channel of the fire extinguishing agent concentration measurement device 31 reach a specific concentration (for example, 6%), it is possible to judge the synchronous time difference of all channels when the installed sampling tubes are connected to the fire extinguishing agent concentration measurement device as a whole.

[0063] As described above, the first embodiment of the present invention has been described in detail, but the present invention is not limited thereto. As long as it does not deviate from the gist of the present invention, the technical solutions obtained by simply transforming, combining, or replacing the elements of the first embodiment of the present invention are all included within the scope of the present invention.

[0064] In the above embodiment, the specific concentration used to verify the channel synchronization of the fire extinguishing agent concentration measurement device is set to 6%, but the present invention is not limited thereto, and it can also be other concentrations.

[0065] In the above embodiment, the time difference △T used to judge whether the synchronization of each channel is qualified is set to 0.1 s, but the present invention is not limited thereto, and the time difference △T can also be set to other values.

[0066] In the above embodiment, the ventilation tank 15 is formed with 40 ventilation holes 151, but the present invention is not limited thereto, and it can also be other quantities.

[0067] In the above embodiment, the shunt 16 is configured to be evenly provided with 12 air outlet holes 162 along the circumferential direction around the center at the top connected to the fire extinguishing agent concentration measurement device 31, but the present invention is not limited thereto, and it can also be formed with other quantities of air outlet holes 162.

[0068] In the above-mentioned embodiment, the number of channels in the fire extinguishing agent concentration measuring device is 12. Correspondingly, the number of sampling tubes is 12, and the number of air outlet holes of the flow divider is 12. However, the present invention is not limited thereto, and other numbers may also be used.

[0069] In the above-mentioned embodiment, the verification device and method for the channel synchronization of the fire extinguishing agent concentration measuring device are mainly used to verify the synchronization of each channel of the fire extinguishing agent concentration measuring device body, and the shapes of the sampling tubes are the same. However, the present invention is not limited thereto. The synchronization verification work can be carried out by simulating the shape of the sampling tube or in the actual application scenario using the verification device (fire extinguishing agent standard gas cylinder, pressure reducer, pressure regulating valve, switching valve, ventilation tank, flow divider) and method.

Claims

1. A verification device for the channel synchronization of a fire extinguishing agent concentration measuring device, which is connected to the fire extinguishing agent concentration measuring device via a plurality of sampling tubes, characterized in that It includes a fire extinguishing agent standard gas cylinder, a pressure reducer, a pressure regulating valve, a switching valve, a ventilation tank, and a shunt that are connected in sequence. The fire extinguishing agent standard gas cylinder stores fire extinguishing agent standard gas. The pressure reducer and the pressure regulating valve regulate the fire extinguishing agent standard gas to a specific pressure. The switching valve releases and blocks the fire extinguishing agent standard gas that has been regulated to a specific pressure. The ventilation tank is formed with a plurality of ventilation holes communicating with external air. The shunt evenly shunts the gas from the ventilation tank and is respectively connected to a plurality of channels of the fire extinguishing agent concentration measuring device via a plurality of the sampling tubes.

2. The verification device for the channel synchronization of the fire extinguishing agent concentration measuring device according to claim 1, wherein The shunt is in a cylindrical shape, with an air inlet hole opened at the center of the bottom and a plurality of air outlet holes evenly opened in the circumferential direction around the center of the top.

3. A verification method for the channel synchronization of a fire extinguishing agent concentration measuring device, which is implemented by the verification device for the channel synchronization of the fire extinguishing agent concentration measuring device according to claim 1 or 2, characterized in that, It includes: The step of sequentially connecting the verification device for the channel synchronization of the fire extinguishing agent concentration measuring device according to claim 1 or 2 with the fire extinguishing agent concentration measuring device, a vacuum pump, and a fire extinguishing agent collection device; The step of powering on the fire extinguishing agent concentration measuring device and starting preheating; The step of detecting that the fire extinguishing agent concentration measuring device reaches a preset temperature and the preheating is completed; The step of opening the fire extinguishing agent standard gas cylinder and adjusting the pressure reducer and the pressure regulating valve to regulate the fire extinguishing agent standard gas from the fire extinguishing agent standard gas cylinder to a standard atmospheric pressure; The step of closing the switching valve and driving the vacuum pump to suck external air into the fire extinguishing agent concentration measuring device until the pressure difference generated by the external air flowing through the fire extinguishing agent concentration measuring device reaches a stable reference pressure difference; The step of opening the switching valve to release the fire extinguishing agent standard gas, observing the time difference when the fire extinguishing agent concentration measurement values in each channel of the fire extinguishing agent concentration measuring device reach a specific concentration, and verifying the channel synchronization of each channel according to the time difference; And The step of powering off the fire extinguishing agent concentration measuring device and evacuating.

4. The verification method for the channel synchronization of the fire extinguishing agent concentration measuring device according to claim 3, wherein When the fire extinguishing agent is Halon 1301 fire extinguishing agent, the specific concentration is 6%.

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