CN111665332B - Calibration device and calibration method of gas extinguishing agent concentration test equipment - Google Patents
Calibration device and calibration method of gas extinguishing agent concentration test equipment Download PDFInfo
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- CN111665332B CN111665332B CN202010644960.7A CN202010644960A CN111665332B CN 111665332 B CN111665332 B CN 111665332B CN 202010644960 A CN202010644960 A CN 202010644960A CN 111665332 B CN111665332 B CN 111665332B
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Abstract
One aspect of the present disclosure relates to a calibration apparatus, including an air distribution unit that controls a fire extinguishing agent flow meter and an air flow meter based on a predetermined ratio to respectively flow-control a fire extinguishing agent from a fire extinguishing agent storage tank and air from a high pressure air bottle so that the flow-controlled fire extinguishing agent and air satisfy predetermined concentration and flow requirements; the temperature control unit is used for mixing and controlling the temperature of the fire extinguishing agent and the air subjected to flow control so that the fire extinguishing agent-air mixture meets the preset temperature requirement; and a calibration test unit comprising a plurality of test channels for simultaneous calibration of the fire suppressant air mixture in the plurality of test channels. The disclosure also relates to corresponding methods and the like.
Description
Technical Field
The present disclosure relates generally to gas fire suppressant concentration testing, and more particularly to aircraft gas fire suppressant concentration testing.
Background
When the research and development and the approval test of the fire extinguishing system are carried out, the distribution condition and the change rule of the concentration of the fire extinguishing agent sprayed in the protected space need to be tested by using the gas fire extinguishing agent concentration testing equipment so as to verify the fire extinguishing capability of the fire extinguishing system.
For example, in the development and airworthiness certification tests of fire extinguishing systems of cargo holds, engine cabins and auxiliary power cabins of airplanes, the distribution and the change rule of the concentration of the sprayed fire extinguishing agent in a protected space need to be tested on the airplane by using a gas fire extinguishing agent concentration testing device so as to verify the fire extinguishing capacity of the fire extinguishing system.
In order to accurately measure the concentration of the gaseous extinguishing agent released into the protected space, calibration needs to be performed on a gaseous extinguishing agent concentration test device before an onboard test is carried out. The accuracy of the calibration of the gas fire extinguishing agent concentration testing equipment directly influences the accuracy and effectiveness of the gas fire extinguishing agent concentration testing result, thereby influencing the judgment of the fire extinguishing capacity of the fire extinguishing system by the airworthiness authorities and engineering technicians.
When the concentration test equipment of the gaseous extinguishing agent in one scheme is calibrated, firstly, a extinguishing agent sample with known concentration is prepared and filled in a storage container; connecting a sampling probe of fire extinguishing agent concentration testing equipment with a fire extinguishing agent sample container, and then performing suction sampling to test the concentration of the fire extinguishing agent; and establishing a corresponding relation between the voltage signal obtained by the test and the concentration of the fire extinguishing agent in the corresponding sample pool, thereby obtaining a standard curve.
In this scheme, a group of fire extinguishing agent sample pools with different concentrations is generally required to be prepared, and the calibration cost is high. The fire suppressant sample in the sample container is at rest. This is different from the actual situation that the fire extinguishing agent in the fire extinguishing agent concentration test equipment in the engine compartment and the auxiliary power compartment is in a high-speed flowing state, and different temperatures such as high temperature and low temperature cannot be calibrated. Moreover, in the scheme, the single channel is usually calibrated in sequence, the operation is extremely complicated, and the synchronization of calibration cannot be ensured.
Other schemes relate to synchronous calibration of concentration values of a plurality of measurement channels of the fire extinguishing agent concentration measurement equipment, but fire extinguishing agent sample containers with different concentrations are still needed, and calibration of different scenes such as high temperature, low temperature, high flow rate and the like cannot be performed. Moreover, the test outlet arrangement is generally parallel to the gas flow direction, unlike the actual use case.
The calibration method and the device for the fire extinguishing agent concentration test equipment need to prepare a fire extinguishing agent sample with known concentration in advance, can only realize the calibration of the fire extinguishing agent under the conditions of constant flow rate and normal temperature, and have the advantages of higher calibration cost, larger calibration error and single function.
Disclosure of Invention
One aspect of the present disclosure relates to a calibration apparatus, including an air distribution unit that controls a fire extinguishing agent flow meter and an air flow meter based on a predetermined ratio to respectively flow-control a fire extinguishing agent from a fire extinguishing agent storage tank and air from a high pressure air bottle so that the flow-controlled fire extinguishing agent and air satisfy predetermined concentration and flow requirements; the temperature control unit is used for mixing and controlling the temperature of the fire extinguishing agent and the air subjected to flow control so that the fire extinguishing agent-air mixture meets the preset temperature requirement; and a calibration test unit comprising a plurality of test channels for simultaneous calibration of the fire suppressant air mixture in the plurality of test channels.
According to an exemplary embodiment, the calibration test unit further comprises a rectification chamber for rectifying the temperature-controlled fire suppressant air mixture to disperse the flow of the fire suppressant air mixture.
According to an exemplary embodiment, the calibration test unit further comprises a test chamber, and the plurality of test channels comprises a plurality of test outlets evenly distributed on an outer wall of the plurality of test chambers.
According to a further exemplary embodiment, the plurality of test outlets protrude into the interior of the test chamber and are arranged perpendicular to the gas flow direction of the fire suppressant air mixture.
According to an exemplary embodiment, the temperature control unit comprises a thermostatic bath and a helical coil immersed in the thermostatic bath.
According to an exemplary embodiment, the length of the helical coil is configured to be sufficient to cause the flow-controlled fire suppressant and air to mix sufficiently and to cause the fire suppressant air mixture to exchange heat sufficiently with a thermostatic bath.
According to an exemplary embodiment, the air distribution unit is further adapted to control a fire suppressant pressure reducing valve connected between the fire suppressant storage tank and the fire suppressant flow meter, and an air pressure reducing valve connected between the high pressure air bottle and the air flow meter such that the fire suppressant from the fire suppressant storage tank and the air from the high pressure air bottle meet the respective input pressure requirements of the fire suppressant flow meter and the air flow meter.
According to an exemplary embodiment, the flow requirement comprises that the sum of the flow controlled fire suppressant and air is equal to or slightly larger than the total flow that needs to be pumped by the fire suppressant concentration testing device.
According to a further exemplary embodiment, the calibration test unit further comprises a discharge outlet for removing excess fire suppressant air mixture after suction by the fire suppressant concentration testing device.
According to an exemplary embodiment, the gas distribution unit is further configured to heat the fire extinguishing agent storage tank by an electric heating belt wound outside the fire extinguishing agent storage tank, thereby promoting vaporization of the fire extinguishing agent to secure a pressure of the fire extinguishing agent storage tank.
The disclosure also relates to a corresponding calibration method.
Drawings
FIG. 1 illustrates a block diagram of a calibration system for a gaseous extinguishing agent concentration testing apparatus according to an aspect of the present disclosure.
Fig. 2 illustrates a block diagram of a calibration arrangement for a gaseous extinguishing agent concentration testing apparatus according to an aspect of the present disclosure.
FIG. 3 illustrates a flow chart of a calibration method for calibrating an extinguishing agent concentration testing device using a calibration apparatus according to an aspect of the present disclosure.
FIG. 4 illustrates a flow chart of a calibration method for calibrating an extinguishing agent concentration testing device using a calibration apparatus according to an aspect of the present disclosure.
FIG. 5 illustrates a cross-sectional view and a side view of a calibration tester in accordance with an aspect of the present disclosure.
Fig. 6 illustrates a block diagram of a control unit in accordance with an aspect of the disclosure.
Detailed Description
Fig. 1 illustrates a block diagram of a calibration system 100 for a gaseous extinguishing agent concentration testing apparatus according to an aspect of the present disclosure. As can be seen, exemplary calibration system 100 may include a gas distribution unit 102, a temperature control unit 104, and a calibration test unit 106.
According to an exemplary embodiment, the air distribution unit 102 is configured to distribute a set ratio of vaporized fire suppressant and air and provide it to the temperature control unit 104. According to various embodiments, the vaporized extinguishing agent and air may be provided to temperature control unit 104 after mixing, or may be provided separately to temperature control unit 104 without mixing. The gas distribution unit according to the embodiment of the disclosure is used for preparing fire extinguishing agents with various concentrations in real time, and high cost and complex operation caused by storage of a fire extinguishing agent gas cylinder with standard concentration are avoided.
According to an exemplary embodiment, temperature control unit 104 receives vaporized fire suppressant and air. In embodiments where vaporized agent is not mixed with air, temperature control unit 104 mixes it and adjusts the mixed agent air mixture to a set temperature. Alternatively, in embodiments where vaporized extinguishing agent is already mixed with air, temperature control unit 104 may optionally further mix it and adjust the mixed extinguishing agent to a set temperature.
Subsequently, the temperature control unit 104 provides the fire suppressant air mixture at the desired temperature to the calibration test unit 106. According to an exemplary embodiment, calibration test unit 106 rectifies and tests the output of the fire suppressant air mixture. According to various embodiments, calibration test unit 106 may include one or more test channels to perform test outputs. According to a preferred embodiment, the test channels of the calibration test unit 106 may be arranged perpendicular to the gas flow direction.
Fig. 2 illustrates a block diagram of a calibration arrangement 200 for a gaseous extinguishing agent concentration testing apparatus according to an aspect of the present disclosure.
As can be seen, the calibration apparatus 200 may include a fire suppressant storage tank 202 and a high pressure air tank 204. The fire suppressant storage tank 202 and the high pressure air tank 204 are plumbed to respective precision gas volumetric flow meters 210 and 212 via respective gas pressure reducing valves 206 and 208, respectively.
Generally, the fire suppressant tank 202 and the high pressure air tank 204 have a relatively high pressure and are therefore depressurized by gas depressurization valves 206, 208, respectively, to meet the input requirements of respective precision gas volumetric flow meters 210, 212.
According to an exemplary embodiment, a control unit 214 is coupled to the flow meters 210 and 212 and is configured to adjust the output flow rates of the precision gas volume flow meters 210, 212 to control the flow rate of the fire suppressant and the flow rate of the air, respectively, to precisely control the ratio of fire suppressant and air to achieve a desired concentration of fire suppressant.
Through the accurate control to the precision flowmeter, can formulate the fire extinguishing agent air mixture of any concentration and velocity of flow, this high cost and the loaded down with trivial details operation that has not only avoided using standard gas cylinder to bring is also convenient for realize the high-efficient demarcation to different concentration fire extinguishing agents.
According to an exemplary embodiment, in actual operation, if the fire suppressant storage tank 202 is opened for a long period of time, the internal pressure may drop due to the heat absorbed by the vaporization of the internal fire suppressant, and the input requirements of the respective precision gas volume flow meter 210, 212 may not be met.
To this end, according to an optional embodiment, the fire suppressant storage tank 202 may be wrapped around its periphery with electrical heating tape 216 for heating the fire suppressant storage tank to promote vaporization of the fire suppressant to ensure tank pressure.
According to one embodiment, flow meters 210 and 212 output a known flow of fire suppressant and air to a temperature control unit consisting of a thermostatic bath 220 and a spiral coil 218 immersed therein, respectively, whereby further flow mixing of fire suppressant and air within the spiral coil results in a fire suppressant air mixture of known concentration, while at the same time the fire suppressant air mixture is adjusted to a set temperature by heat exchange with the thermostatic bath 220 to avoid variations in fire suppressant air mixture temperature over time calibration, thereby affecting calibration accuracy and reliability. In addition, by adjusting the temperature control unit, the fire extinguishing agent air mixture with any required temperature can be obtained, which is convenient for carrying out high-efficiency calibration on various temperature scenes such as high temperature, low temperature and the like.
According to some preferred embodiments, the helical coil may be made of a material that conducts heat well. For example, according to a preferred embodiment, the helical coil may comprise copper or a gaseous high thermal conductivity material or a combination thereof.
According to a preferred embodiment, the spiral coil may be made to have a greater length to allow the fire suppressant to be sufficiently mixed with the air in the spiral coil and to allow the fire suppressant air mixture to be sufficiently heat exchanged with the thermostatic bath 220.
According to an alternative embodiment, the flow-controlled fire suppressant and air output by flow meters 210 and 212, respectively, may be passed through a mixing device (not shown) before being output to spiral coil 218. The mixing device may comprise a simple coil, straight tube, or other passive or active mixing device.
The temperature controlled fire suppressant air mixture is output by a line through the spiral coil output end of the thermostatic bath 220 to an inlet 224 of a calibration tester 222.
According to one embodiment, calibration tester 222 may include a rectification chamber 222a and a test chamber 222 b. The fire suppressant air mixture input to the inlet 224 of the calibration tester 222 first enters the rectification chamber 222a, is rectified by the rectification chamber 222a and then enters the test chamber 222b at a uniform velocity, and then is sucked out through the test outlet 226 by, for example, a fire suppressant concentration test device (not shown). Excess suppressant may be discharged from the discharge outlet 228.
According to an exemplary embodiment, the rectification chamber 222a may be filled with, for example, a porous sponge (e.g., without limitation, 50ppi porous sponge) for dispersing the airflow and mixing the fire suppressant uniformly.
According to another exemplary embodiment, the outer wall of the test chamber 222b may be evenly distributed with a plurality of test outlets 226 for connection with fire suppressant concentration test lines (not shown). According to an exemplary embodiment, these test outlets 226 may be evenly distributed on the outer wall of the test chamber. According to an exemplary embodiment, the test outlet 226 may protrude into the interior of the test chamber 222b and be arranged perpendicular to the gas flow direction.
According to an alternative embodiment, the testing chamber 222b may include, for example, 12 testing outlets 226 to correspond to 12 testing channels.
According to an alternative embodiment, the end surface of the discharge outlet is in threaded connection with the calibrator shell, and the diameter of the discharge outlet on the end surface can be selected according to the difference between the flow of the fire extinguishing agent and the suction flow of the concentration testing equipment. That is, bleed outlets 228 having different diameters may be selected based on the magnitude of the inlet flow of the calibration tester 222 versus the inspiratory flow of the test outlet 226. Generally, the larger the inlet flow is relative to the suction flow, the larger the discharge outlet diameter should be. The present disclosure is not limited to the connection manner between the discharge outlet end surface and the calibrator housing, but may include other connection manners.
FIG. 3 illustrates a flow chart of a calibration method 300 for calibrating an extinguishing agent concentration testing device using a calibration apparatus according to an aspect of the present disclosure. For example, the calibration arrangement may comprise a calibration system 100 for a gaseous extinguishing agent concentration testing device, such as described above in connection with fig. 1, and/or a calibration arrangement 200 for a gaseous extinguishing agent concentration testing device, such as described with respect to fig. 2, etc.
According to an exemplary embodiment, the calibration method 300 may include controlling the pressure of the fire suppressant and air at block 302. For example, controlling the pressure of the fire suppressant and air may include outputting gas that meets the respective pressure requirements by adjusting, for example, the respective pressure relief valves of the fire suppressant storage tank and the high pressure air tank.
At block 304, the calibration method 300 may include adjusting the ratio of fire suppressant and air to meet predetermined concentration and flow requirements. For example, adjusting the fire suppressant and air mix ratio to meet the predetermined concentration and flow requirements may include adjusting the fire suppressant and air mix ratio to meet the predetermined concentration requirements by adjusting, for example, flow meters connected to the fire suppressant storage tank and the high pressure air bottle, respectively, and making the sum of the flow rates of fire suppressant and air equal to the total flow requirement that the fire suppressant concentration testing equipment needs to draw.
At block 306, the calibration method 300 may include mixing the fire suppressant and air and controlling the temperature of the mixture thereof. For example, mixing the fire suppressant and air may include mixing the fire suppressant and air by using a mixing device. The mixing device may include various active or passive mixing devices. According to an example, the passive mixing device may comprise a helical coil or other straight tube or the like.
Controlling the temperature of the fire suppressant air mixture may be accomplished by various temperature control means and/or devices. According to an example, a thermostatic bath may be employed as the temperature control device. For example, a spiral coil may be immersed in a thermostatic bath so that the fire suppressant and air mix within the spiral coil while the fire suppressant air mixture is adjusted to a set temperature by heat exchange with the thermostatic bath.
At block 308, the calibration method 300 may include rectifying the fire suppressant air mixture. Rectifying the fire suppressant air mixture aims to disperse the air flow and mix the fire suppressant with the air more uniformly to improve the air flow stability and uniformity of the fire suppressant air mixture. Rectification may be performed by using various rectification means/devices.
At block 310, the calibration method 300 may include outputting the rectified fire suppressant air mixture to a plurality of test channels for measurement of concentration values thereof by a fire suppressant concentration test apparatus.
At block 312, the calibration method 300 may include comparing the concentration values measured by the plurality of test channels to a predetermined concentration at which calibration of the fire suppressant concentration test apparatus is completed.
FIG. 4 illustrates a flow chart of a calibration method 400 for calibrating an extinguishing agent concentration testing device using a calibration apparatus according to an aspect of the present disclosure. The method 400 may include the steps of:
step one, starting a fire extinguishing agent concentration testing device for preheating, and connecting a fire extinguishing agent concentration testing pipeline to a corresponding testing outlet of a testing cavity of a calibration device (block 402);
step two, opening the thermostatic bath, and waiting for the temperature of the thermostatic bath to reach the temperature required to be calibrated (block 404);
as can be appreciated, the preheating of the fire suppressant concentration testing apparatus and the opening of the thermostatic bath may be sequential or simultaneous, and the disclosure is not limited in this respect.
Step three, opening a high-pressure air bottle and a fire extinguishing agent storage tank main valve, and adjusting a pressure reducing valve to output gas meeting the pressure required by each flowmeter (block 406);
for example, after the fire extinguishing agent concentration testing equipment is preheated and the thermostatic bath reaches the set temperature, the high-pressure air bottle is opened, and the output pressure of the pressure reducing valve is adjusted to meet the requirements of the air flow meter. Similarly, the valve of the fire extinguishing agent storage tank can be opened, and the output pressure of the pressure reducing valve is adjusted to meet the requirement of the fire extinguishing agent flow meter.
Step four, after data acquisition is started (block 408), adjusting respective corresponding flowmeters of the fire extinguishing agent and the air through the control unit according to the target concentration to enable the proportion of the fire extinguishing agent and the air to meet the preset concentration, and enabling the sum of the flow rates of the fire extinguishing agent and the air to be equal to or slightly larger than the total flow rate sucked by the fire extinguishing agent concentration testing equipment (block 410);
step five, data stabilization (block 412).
(i) enabling the fire extinguishing agent air mixture reaching the preset concentration to pass through a thermostatic bath, and controlling the temperature of the fire extinguishing agent to reach the preset temperature;
(ii) the fire extinguishing agent air mixture with constant temperature flows into a rectification cavity and a test cavity of the calibration device after passing through the thermostatic bath;
(iii) the concentration values of a plurality of testing channels of the testing cavity of the calibrating device connected with the device are measured by the fire extinguishing agent concentration testing device, the concentration calibration is finished after the data obtained by the test is stable,
generally, after the data obtained by the equipment for testing the concentration of the fire extinguishing agent is stable for a certain period of time (for example, a threshold time), the calibration of the current concentration can be finished.
Step six, closing the fire extinguishing agent concentration testing equipment, the gas cylinder and the thermostatic bath (block 416);
according to one embodiment, after calibration is completed and data collection is stopped, the valve of the fire suppressant storage tank may be closed first, and the high pressure air bottle may be closed after a period of time.
And step seven, according to the concentration values obtained by measuring the plurality of test channels and the preset concentration, completing the calibration of the fire extinguishing agent concentration test device under the preset concentration (block 418).
Optionally, the calibration method 400 for the fire suppressant concentration test apparatus may further comprise one or more of the following steps:
and step eight, adjusting the flow meter through the control unit according to other preset concentrations to enable the ratio of the fire extinguishing agent to the air to meet other preset concentrations, and repeating the steps one to seven to perform the calibration test of the next concentration.
Optionally, in the second step, the temperature to be calibrated is reached by heating the aqueous medium in the thermostatic bath.
Optionally, in the third step, an electric heating belt is wound on the periphery of the fire extinguishing agent storage tank for heating the fire extinguishing agent storage tank to promote the vaporization of the fire extinguishing agent so as to ensure the pressure of the storage tank;
optionally, in the third step, the high-pressure air bottle and the fire extinguishing agent storage tank main valve are opened firstly, and then the pressure of the fire extinguishing agent and the air is adjusted through the pressure reducing valve;
optionally, in the fourth step, if the fire extinguishing agent concentration testing device is to be calibrated under higher flow rate conditions, the sum of the flow rates of the fire extinguishing agent and the air should be larger than the total flow rate sucked by the fire extinguishing agent concentration testing device, and then the discharge outlet with the larger diameter should be selected;
optionally, in step five (1), a spiral coil is placed in the thermostatic bath, and the material is copper with good heat conductivity. The spiral coil is connected with the outlet of the flowmeter, and the fire extinguishing agent and air are mixed in the spiral coil and used for controlling the temperature of the mixture of the fire extinguishing agent and the air;
optionally, in step (ii) of the fifth step, a piece of porous sponge is fixed in the rectification cavity of the calibration device and used for dispersing the airflow and uniformly mixing the fire extinguishing agent;
optionally, in step (iii) of the fifth step, the testing chamber in the calibration device has a plurality of measuring outlets matching with the number of the measuring channels, the plurality of measuring outlets are uniformly distributed on the outer wall of the testing chamber, and the testing outlets are arranged perpendicular to the gas flow direction;
optionally, the number of measurement channels in the calibration device is 12;
optionally, in the seventh step, the data acquisition system in the fire extinguishing agent concentration measuring apparatus first acquires the micro-pressure differences in the plurality of measuring channels, and then calculates the concentration values of the plurality of measuring channels according to the micro-pressure differences. As can be appreciated, when the fire suppressant concentration measurement device is configured to perform other types of tests (e.g., infrared), the data acquisition system in the fire suppressant concentration measurement device may perform data acquisition accordingly and obtain the concentration values for the plurality of test channels.
Fig. 5 illustrates a cross-sectional view and a side view of a calibration tester 500 in accordance with an aspect of the present disclosure. Calibration tester 500 may include, for example, calibration test unit 106 described above in connection with fig. 1 and/or calibration tester 222 described in connection with fig. 2, etc., and may be used in calibration system 100 described in connection with fig. 1 for a gaseous fire-extinguishing agent concentration testing apparatus and/or calibration apparatus 200 described in connection with fig. 2 for a gaseous fire-extinguishing agent concentration testing apparatus, etc., to implement calibration method 300 described in connection with fig. 3 for calibrating a fire-extinguishing agent concentration testing apparatus using the calibration apparatus and/or calibration method 400 described in connection with fig. 4 for calibrating a fire-extinguishing agent concentration testing apparatus using the calibration apparatus, etc.
According to an exemplary embodiment, calibration tester 500 may include a calibration tester inlet 502, a rectifying chamber 504, a test chamber 506, a test outlet 508, a calibration device end cap 510, and a drain outlet 512.
According to an exemplary embodiment, the inlet 502 of the calibration tester 500 may be in communication with a rectification chamber 504 and used to input the fire suppressant air mixture.
According to an exemplary embodiment, a porous sponge or the like may be included within the fairing cavity 504. For example, the fairing cavity 504 can be completely filled with a monolith of porous sponge. The rectification chamber 504 may rectify the incoming fire suppressant air mixture to disperse the air flow and mix it more uniformly.
According to an exemplary embodiment, the fire suppressant air mixture is rectified by the rectification chamber 504 and enters the test chamber 506. In this embodiment, 12 test outlets 508 may be evenly distributed on the outer wall of the test chamber 506.
For example, (a) - (d) of fig. 5 show side views of different shapes of the calibration tester 500, and various distributions of test outlets.
For example, take 12 test exits 508 as an example. In example (a), the calibration tester 500 may be rectangular parallelepiped in shape and the end cap 510 may be square or rectangular. The 12 test outlets 508 may be divided into four groups, and the three test outlets 508 of each group may be respectively arranged in a straight line on the outer wall of one side of the test chamber 506.
In example (b), the calibration tester 500 may be cylindrical in shape and the end cap 510 may be circular. The 12 test outlets 508 may be divided into three groups (or four groups, not shown), and four test outlets 508 of each group (or three groups, not shown) may be arranged on the outer wall of the test chamber 506 along a straight line, and each group of test outlets is at an angle of 120 degrees with respect to the other two groups of test outlets, as seen in a side view.
In example (c), the calibration tester 500 may be rectangular parallelepiped in shape similar to that in (a), and the end cap 510 may be square or rectangular. The 12 test outlets 508 may be divided into two groups (or three groups, not shown), and six test outlets 508 (or four test outlets, not shown) of each group may be respectively arranged on two or more outer walls of the test chamber 506 along a straight line, and the test outlets 508 are not distributed on at least one outer wall of the test chamber 506 for installation or placement, etc.
In example (d), the calibration tester 500 may be a prism shape (e.g., a triangular prism), and the end cap 510 may be a corresponding polygon. The 12 test outlets 508 may be divided into N groups (N is less than or equal to the number of prisms), each group of test outlets 508 may be respectively arranged along a straight line on an outer wall of one side of the test chamber 506, and none, one, or more outer walls of the test chamber 506 may be partially provided with test outlets 508 for installation or placement, etc.
Of course, the shape of the calibration tester 500 and/or the number and distribution of the test outlets 508 are not so limited. For example, more or fewer test outlets may be provided, depending on actual needs and/or industry specifications; the test outlets may be divided into more or fewer groups; and/or the test outlets may be arranged in other patterns (e.g., spiral around the test chamber 506, etc.). In addition, the cross-sectional shape of the discharge outlet is not limited to being circular, nor is the number limited to one, nor is the location limited to being centered only in the end cap, but may be any other shape/number/location and arrangement.
According to an exemplary embodiment, the test outlet 508 may extend through an outer wall of the test chamber 506 into the interior thereof. The end of the test chamber 506 includes a calibration device end cap 510. According to an example, calibration device end cap 510 may be coupled to test chamber 506 via, for example, threads. A discharge outlet 512 is connected to the end cap 510 for removing excess suppressant air mixture.
According to an exemplary embodiment, the bleed outlet 512 may be selected to have a different diameter based on the magnitude of the inlet flow of the calibration tester 500 versus the suction flow of the test outlet 508, with the bleed outlet diameter being larger the greater the inlet flow than the suction flow.
According to an exemplary embodiment, the fire suppressant air mixture entering the calibration tester 500 causes the airflow to enter the test chamber 506 in a uniformly dispersed manner within the rectification chamber 504 due to the presence of the porous sponge. A test outlet 512 extending into the test chamber 506 may draw the evenly dispersed fire suppressant in a flowing state.
According to an exemplary embodiment, by using the calibration tester 500 as shown in fig. 5, the calibration apparatus can calibrate 12 channels of the fire suppressant concentration testing apparatus at the same time, with, for example, 12 evenly distributed test outlets 508 being set, enabling simultaneous calibration of multiple (e.g., up to 12 in this example) ways of fire suppressant.
When the scheme disclosed guarantees that the fire extinguishing agent concentration test equipment is calibrated, the air source of each channel has consistency and synchronism, and each test outlet is perpendicular to the air flow direction and is closer to the actual use condition of the fire extinguishing agent concentration test equipment, so that the calibration precision of each channel is guaranteed while the calibration efficiency is improved
In addition, the present disclosure provides an integrated scheme that changes concentration, temperature, velocity of flow, entry flow etc. of fire extinguishing agent simultaneously, can realize the demarcation to fire extinguishing agent under the different conditions to when improving calibration efficiency, also improved the demarcation accuracy.
Fig. 6 illustrates a block diagram of a control unit 600 in accordance with an aspect of the disclosure. The control unit 600 may include, but is not limited to, a fire suppressant flow meter control module 602, an air flow meter control module 604, a temperature control unit control module 606, a master valve control module 608, a pressure reduction valve control module 610, and a concentration ratio determination unit 612. The control unit 600 may also include input and output interfaces, as well as components such as a processor and memory (not shown).
According to an exemplary embodiment, the fire suppression agent flow control module 602 and the air flow meter control module 604 are respectively configured to control the precision gas volume flow meters corresponding to the fire suppression agent and the air according to the concentration ratios determined by the concentration ratio determination unit 612 to respectively adjust the flow rates of the fire suppression agent and the air, thereby precisely controlling the ratio of the fire suppression agent and the air to achieve a desired fire suppression agent concentration.
According to an exemplary embodiment, the temperature control unit control module 606 is used to control the temperature control unit to regulate the fire suppressant air mixture to a set temperature.
For example, when the temperature control unit includes a thermostatic bath, the temperature control unit control module may control the temperature of the thermostatic bath such that the fire suppressant air mixture passing through the thermostatic bath is adjusted to a desired temperature by heat exchange with the thermostatic bath. Therefore, the fire extinguishing agent air mixture with any required temperature can be obtained, and efficient calibration of various temperature scenes such as high temperature, low temperature and the like is facilitated.
According to an exemplary embodiment, the master valve control module 608 may be used to control master valves of the high pressure air tank and the fire suppressant storage tank, e.g., may open and/or close the respective master valves.
According to an exemplary embodiment, the pressure relief valve control module 610 may be configured to control the pressure relief valves of the high-pressure air tank and the suppressant storage tank such that the output pressures of each of the high-pressure air tank and the suppressant storage tank meet the requirements of the respective flow meters.
According to an exemplary embodiment, the concentration ratio determination unit 612 is configured to determine the concentration ratio of the fire suppressant and the air. According to an example, determining the concentration ratio may include calculating, reading, inputting the concentration ratio, and the like. For example, in the case where the control unit 600 includes an input interface, the operator may input a desired concentration ratio through the input interface. As another example, in a case where the control unit 600 includes a memory, the control unit 600 may read the stored concentration ratio from the memory. As another example, in the case where the control unit 600 has a network connection, the control unit 600 may read the concentration ratio through the network.
According to an exemplary embodiment, the control unit 600 may be implemented as a stand-alone unit, may be incorporated into any of the modules described above in connection with fig. 1 and/or 2, or may split its functionality into two or more of the modules described above in connection with fig. 1 and/or 2.
According to an exemplary embodiment, the control unit 600 may be implemented in various ways, such as but not limited to hardware, software, or firmware.
When implemented in hardware, the control unit 600 may include a combination of various electrical and/or mechanical components. When implemented in software, the control unit 600 may be implemented as software modules stored in a memory, and when executed by a processor, may implement the control functions described above in connection with the respective modules.
The control unit 600 may communicate with and implement the control of the unit/module/device/component, etc. being controlled in various ways. For example, the control unit 600 may be directly connected/coupled to a controlled unit/module/device/component or the like through an electronic and/or mechanical manner, or may control the corresponding unit/module/device/component or the like through a wired or wireless remote or local area network or the like.
What has been described above is merely exemplary embodiments of the present invention. The scope of the invention is not limited thereto. Any changes or substitutions that may be easily made by those skilled in the art within the technical scope of the present disclosure are intended to be included within the scope of the present disclosure.
The various illustrative logical blocks, modules, and circuits described in connection with the disclosure may be implemented or performed with a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable Logic Device (PLD), discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor may be a microprocessor, but in the alternative, the processor may be any commercially available processor, controller, microcontroller or state machine. A processor may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
The steps of a method or algorithm described in connection with the disclosure may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. The software modules may reside in any form of storage medium known in the art. Some examples of storage media that may be used include Random Access Memory (RAM), Read Only Memory (ROM), flash memory, EPROM memory, EEPROM memory, registers, a hard disk, a removable disk, a CD-ROM, and so forth. A software module may comprise a single instruction, or many instructions, and may be distributed over several different code segments, among different programs, and across multiple storage media. A storage medium may be coupled to the processor such that the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor.
The methods disclosed herein comprise one or more steps or actions for achieving the described method. The method steps and/or actions may be interchanged with one another without departing from the scope of the claims. In other words, unless a specific order of steps or actions is specified, the order and/or use of specific steps and/or actions may be modified without departing from the scope of the claims.
The processor may execute software stored on a machine-readable medium. A processor may be implemented with one or more general and/or special purpose processors. Examples include microprocessors, microcontrollers, DSP processors, and other circuitry capable of executing software. Software should be construed broadly to mean instructions, data, or any combination thereof, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise. By way of example, a machine-readable medium may include RAM (random access memory), flash memory, ROM (read only memory), PROM (programmable read only memory), EPROM (erasable programmable read only memory), EEPROM (electrically erasable programmable read only memory), registers, a magnetic disk, an optical disk, a hard drive, or any other suitable storage medium, or any combination thereof. The machine-readable medium may be embodied in a computer program product. The computer program product may include packaging material.
In a hardware implementation, the machine-readable medium may be a part of the processing system that is separate from the processor. However, as those skilled in the art will readily appreciate, the machine-readable medium, or any portion thereof, may be external to the processing system. By way of example, a machine-readable medium may include a transmission line, a carrier wave modulated by data, and/or a computer product separate from the wireless node, all of which may be accessed by a processor through a bus interface. Alternatively or additionally, the machine-readable medium or any portion thereof may be integrated into a processor, such as a cache and/or a general register file, as may be the case.
The processing system may be configured as a general purpose processing system having one or more microprocessors that provide processor functionality, and an external memory that provides at least a portion of the machine readable medium, all linked together with other supporting circuitry through an external bus architecture. Alternatively, the processing system may be implemented with an ASIC (application specific integrated circuit) having a processor, a bus interface, a user interface (in the case of an access terminal), support circuitry, and at least a portion of a machine readable medium integrated in a single chip, or with one or more FPGAs (field programmable gate arrays), PLDs (programmable logic devices), controllers, state machines, gated logic, discrete hardware components, or any other suitable circuitry, or any combination of circuitry that is capable of performing the various functionalities described throughout this disclosure. Those skilled in the art will recognize how best to implement the functionality described with respect to the processing system, depending on the particular application and the overall design constraints imposed on the overall system.
The machine-readable medium may include several software modules. These software modules include instructions that, when executed by a device, such as a processor, cause the processing system to perform various functions. These software modules may include a transmitting module and a receiving module. Each software module may reside in a single storage device or be distributed across multiple storage devices. As an example, a software module may be loaded into RAM from a hard drive when a triggering event occurs. During execution of the software module, the processor may load some instructions into the cache to increase access speed. One or more cache lines may then be loaded into a general register file for execution by the processor. When referring to the functionality of a software module below, it will be understood that such functionality is implemented by the processor when executing instructions from the software module.
If implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a computer. By way of example, and not limitation, such computer-readable media can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. Any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a web site, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), or wireless technologies such as Infrared (IR), radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. Disc (disk) as used herein) And discs (disc) including Compact Discs (CD), laser discs, optical discs, Digital Versatile Discs (DVD), floppy discs, and
disks, where a disk (disk) usually reproduces data magnetically, and a disk (disc) reproduces data optically with a laser. Thus, in some aspects, computer-readable media may comprise non-transitory computer-readable media (e.g., tangible media). Additionally, for other aspects, the computer-readable medium may comprise a transitory computer-readable medium (e.g., a signal). Combinations of the above should also be included within the scope of computer-readable media.
Accordingly, certain aspects may comprise a computer program product for performing the operations presented herein. For example, such a computer program product may include a computer-readable medium having instructions stored (and/or encoded) thereon, the instructions being executable by one or more processors to perform the operations described herein. In certain aspects, a computer program product may include packaging materials.
It is to be understood that the claims are not limited to the precise configuration and components illustrated above. Various changes, substitutions and alterations in the arrangement, operation and details of the method and apparatus described above may be made without departing from the scope of the claims.
Claims (10)
1. A calibration device, comprising:
an air distribution unit which controls the fire extinguishing agent flow meter and the air flow meter based on a predetermined ratio to respectively flow-control the fire extinguishing agent from the fire extinguishing agent storage tank and the air from the high-pressure air bottle so that the flow-controlled fire extinguishing agent and the air satisfy predetermined concentration and flow requirements;
the temperature control unit is used for mixing and controlling the temperature of the fire extinguishing agent and the air subjected to flow control so that the fire extinguishing agent-air mixture meets the preset temperature requirement; and
a calibration test unit comprising a plurality of test channels for simultaneous calibration of the fire suppressant air mixture in the plurality of test channels, wherein the plurality of test channels comprise test outlets arranged perpendicular to a gas flow direction of the fire suppressant air mixture.
2. Calibration arrangement according to claim 1, wherein the calibration test unit further comprises a rectification chamber for rectifying the temperature controlled fire suppressant air mixture to disperse the flow of the fire suppressant air mixture.
3. The calibration device of claim 1, wherein the calibration test unit further comprises a test chamber, and a plurality of the test outlets are uniformly distributed on an outer wall of the test chamber.
4. The calibration arrangement of claim 3 wherein the plurality of test outlets extend into the interior of the test chamber.
5. The calibration device according to claim 1, wherein the temperature control unit includes a thermostatic bath and a spiral coil immersed in the thermostatic bath.
6. Calibration arrangement according to claim 5, wherein the length of the spiral coil is configured to be sufficient for sufficient mixing of the flow controlled fire suppressant and air and for sufficient heat exchange of the fire suppressant air mixture with a thermostatic bath.
7. The calibration arrangement of claim 1, wherein the air distribution unit is further configured to control a fire suppressant pressure reducing valve connected between the fire suppressant storage tank and the fire suppressant flow meter, and an air reducing valve connected between the high pressure air bottle and the air flow meter such that the fire suppressant from the fire suppressant storage tank and the air from the high pressure air bottle meet respective input pressure requirements of the fire suppressant flow meter and the air flow meter.
8. Calibration arrangement according to claim 1, wherein said flow requirement comprises that the sum of the flows of said flow controlled fire suppressant and air is equal to or slightly larger than the total flow that needs to be pumped by the fire suppressant concentration test equipment.
9. Calibration arrangement according to claim 8, wherein said calibration test unit further comprises a discharge outlet for discharging excess fire suppressant air mixture after suction by said fire suppressant concentration testing device.
10. The calibration device according to claim 1, wherein the air distribution unit is further configured to heat the fire extinguishing agent storage tank by an electric heating belt wound outside the fire extinguishing agent storage tank, so as to promote the vaporization of the fire extinguishing agent to ensure the pressure of the fire extinguishing agent storage tank.
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