Water mist flux spatial dispersion measuring system and measuring method

Abstract

The invention relates to the technical field of measuring methods, in particular to a water mist flux spatial dispersion measuring system and method. According to the measuring system, a water collecting container system is arranged under a water mist generating device, a gravity sensor system is arranged at the bottom of the water collecting container system, and the gravity sensor system is connected with a quality data acquisition terminal in a wired or wireless mode; and the water mist generating device is connected with a synchronous time recorder for recording spraying time. The water collecting container system is reasonable in design, the multiple unit water collecting containers are arranged in M rows and N columns to form the water collecting container system, measuring devices can be flexibly arranged according to local conditions, and the water collecting container system is effectively applied to various water mist device scenes; the unit gravity sensor collects the water collection mass of each unit water collection container, real-time data are transmitted to the mass data collection terminal for calculation, the water mist density flux Vf of each unit water collection container is obtained through calculation, and the water mist generation effects of different nozzles are presented in a tense, visual and efficient mode.

Description

Technical Field

[0001] The present invention relates to the technical field of measurement methods, and in particular to a water mist flux spatial dispersion measurement system and a measurement method. Background Art

[0002] Fire is a catastrophic problem faced by mankind. The casualties and property losses caused by fires have seriously hindered the development of social economy. Advanced disaster prevention and control methods are effective means to reduce property losses and casualties. Water is the most commonly used fire extinguishing agent and is widely used to extinguish various fires such as buildings, forests and grasslands. Due to the adverse effects of halogenated hydrocarbons and carbon dioxide fire extinguishing agents on the environment, water has received more and more attention as a fire extinguishing agent. Water mist fire extinguishing technology is a fire extinguishing technology that can make full use of the physical and chemical properties of water. It has the characteristics of no environmental pollution (no ozone layer loss and greenhouse effect), low water consumption, low fire extinguishing medium and little damage to the protected objects.

[0003] Atomizing media can be divided into single-fluid system and dual-fluid system. The water mist obtained under different action modes and action forms is different. Therefore, when considering the effect of water mist alone, it is necessary to measure the spatial dispersion of water mist flux as an important parameter for determining the fire extinguishing effect of water mist. It can effectively determine the effect and distribution of water in the water mist system.

[0004] Looking at the relevant patents and literature at home and abroad, it is found that so far, there are few effective quantitative measurement methods for the spatial dispersion of water mist flux and they are relatively complicated. Chinese patent CN 110174252 B discloses a high-pressure fine water mist nozzle mist flux test method, which specifically includes: step one, installing multiple nozzles into the test device; step two, selecting 4 nozzles distributed in a rectangular shape in the test device, and arranging 4×4 water collection trays under the nozzles, the size of the water collection tray is 36cm×28cm×8cm, the longitudinal spacing of the water collection tray is 72cm, the horizontal spacing is 64cm, the water collection tray at the vertex is located directly below the nozzle, and the nozzle is arranged at a height of 6.5m; step three, after turning on the top spray, wait for the fine water mist to fall to the water collection tray to start timing, and the stopwatch records the spray time for 5min; step four, use a measuring cylinder to collect and measure the water collection amount, and divide it by time and area to calculate the mist flux. However, the experimental method recorded in the above patent has a large interval between the water collection method design, and there will be water loss during the collection and measurement process, resulting in large errors. This has a great influence on the determination of the flux parameters of the water mist nozzle, so it is necessary to seek a convenient and efficient measurement method and system to determine the spatial dispersion of the water mist flux. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art and provide a water mist flux spatial dispersion measurement system and measurement method. The measurement method of the present invention effectively calculates the water mist density flux distribution per unit area based on the measurement of gravity sensors and water collection units, and can effectively calculate and predict the water mist injection conditions of the established water mist system.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] A system for measuring the spatial dispersion of water mist flux comprises a water mist generating device, a water collecting container system is arranged directly below the water mist generating device, a gravity sensor system is installed at the bottom of the water collecting container system, and the gravity sensor system is connected to a mass data acquisition terminal by wire or wirelessly; the water mist generating device is connected to a synchronous time recorder for recording the spraying time.

[0008] Furthermore, the water collection container system includes X unit water collection containers, which are arranged in M ​​rows and N columns, X=M×N; the gravity sensor system includes multiple unit gravity sensors, each unit water collection container is equipped with a unit gravity sensor at the bottom, and the unit gravity sensor is connected to the quality data acquisition terminal.

[0009] Furthermore, the water mist generating device is equipped with a density tester for detecting the density of the sprayed liquid.

[0010] A method for measuring the spatial dispersion of water mist flux, the method using the above-mentioned water mist flux spatial dispersion measurement system, the method specifically comprising the following steps:

[0011] Step S1, a water collection container system is arranged directly below the nozzle in the water mist generating device, the water collection container system includes a plurality of cubic unit water collection containers with a side length of a, and a unit gravity sensor is arranged under each unit water collection container to measure the amount of collected water;

[0012] Step S2: Arrange corresponding unit water collection containers according to the actual space size and the spray radius of the nozzle to ensure that the entire water collection container system is directly below the nozzle;

[0013] Step S3, turning on the spray generating device and the synchronous time recorder to record the spray time t;

[0014] Step S4: Each unit gravity sensor transmits the collected data to the mass data collection terminal. The water collection mass of each unit water collection container is m. The mass data collection terminal collects a total of X data. The water mist density flux of each unit water collection container is V. f =m / ρ / t / s; s=a 2 , where ρ is the density of the injected liquid.

[0015] The beneficial effects of the present invention are as follows: the present invention has reasonable design, the measuring method is easy to operate, and has the following advantages:

[0016] (1) Multiple unit water collection containers are arranged in M ​​rows and N columns to form a water collection container system. The measurement device can be flexibly arranged according to local conditions and effectively applied to various water mist device scenarios;

[0017] (2) The unit gravity sensor collects the water collection mass of each unit water collection container and transmits the real-time data to the mass data collection terminal for calculation to obtain the water mist density flux V of each unit water collection container. f , the water mist effects of different nozzles are presented in a temporal, visual and efficient manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of the measurement system in the present invention;

[0020] Figure 2 It is the installation diagram of the unit water collection container and the unit gravity sensor;

[0021] Figure 3 It is the installation diagram of the water collection container system and the gravity sensor system;

[0022] Figure 4 It is a bar chart of the water mist density flux of 64 unit water collection containers in Example 1.

[0023] In the figure: 1. Unit water collection container, 2. Unit gravity sensor, 3. Density tester, 4. Quality data acquisition terminal, 5. Synchronous time recorder, 6. Water mist generating device, 7. Water collection container system, 8. Gravity sensor system. DETAILED DESCRIPTION

[0024] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0025] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form also includes the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this description, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0026] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] like Figures 1 to 3 A water mist flux spatial dispersion measurement system shown includes a water mist generating device 6, a water collecting container system 7 is provided directly below the water mist generating device 6, a gravity sensor system 8 is installed at the bottom of the water collecting container system 7, and the gravity sensor system 8 is connected to a mass data acquisition terminal 4 by wire or wireless; the water mist generating device 6 is connected to a synchronous time recorder 5 for recording the spray time.

[0028] The water collecting container system 7 includes X unit water collecting containers 1, which are arranged in M ​​rows and N columns, X=M×N; the gravity sensor system 8 includes multiple unit gravity sensors 2, and a unit gravity sensor 2 is installed at the bottom of each unit water collecting container 1, and the unit gravity sensor 2 is connected to the quality data acquisition terminal 4.

[0029] The water mist generating device 6 is provided with a density tester 3 for detecting the density of the sprayed liquid. The density tester 3 measures the density of the sprayed liquid before measuring. The water mist generating device 6 comprises a water tank and a nozzle under the water tank. The density tester 3 can also be externally mounted on the water tank.

[0030] A method for measuring the spatial dispersion of water mist flux specifically comprises the following steps:

[0031] Step S1, a water collection container system 7 is arranged directly below the nozzle in the water mist generating device 6, and the water collection container system includes a plurality of cubic unit water collection containers 1 with a side length of a, and a unit gravity sensor 2 is arranged under each unit water collection container 1 to measure the amount of collected water;

[0032] Step S2, arranging corresponding unit water collection containers 1 according to the actual space size and the spray radius of the nozzle, ensuring that the entire water collection container system 7 is directly below the nozzle;

[0033] Step S3, turning on the spray generating device and the synchronous time recorder 5 to record the spray time t;

[0034] Step S4, each unit gravity sensor 2 transmits the collected data to the mass data collection terminal 4. The water collection mass of each unit water collection container 1 is m. The mass data collection terminal 4 collects a total of X data. The water mist density flux V of each unit water collection container 1 is f =m / ρ / t / s; s=a 2 , where ρ is the density of the injected liquid.

[0035] Example 1

[0036] A method for measuring the spatial dispersion of water mist flux specifically comprises the following steps:

[0037] Step S1, a water collection container system 7 is arranged directly below the nozzle in the water mist generating device 6, and the water collection container system includes a plurality of cubic unit water collection containers 1 with a side length of a, and a unit gravity sensor 2 is arranged under each unit water collection container 1 to measure the amount of collected water;

[0038] Step S2, arranging corresponding unit water collection containers 1 according to the actual space size and the spray radius of the nozzle, ensuring that the entire water collection container system 7 is directly below the nozzle;

[0039] Step S3, turning on the spray generating device and the synchronous time recorder 5 to record the spray time t;

[0040] Step S4, each unit gravity sensor 2 transmits the collected data to the mass data collection terminal 4. The water collection mass of each unit water collection container 1 is m. The mass data collection terminal 4 collects a total of X data. The water mist density flux V of each unit water collection container 1 is f =m / ρ / t / s; s=a 2 , where ρ is the density of the injected liquid.

[0041] In this embodiment, the unit water collection containers 1 are arranged in 8 rows and 8 columns, and there are 64 unit water collection containers 1 in total, with a side length a of 10 cm and s of 100 cm. 2 The spraying time t is 5 min, the spraying liquid is water, and the density of the spraying liquid ρ is 1 g / cm 3 , according to V f =m / ρ / t / s, and the water mist density flux V of each unit water collection container 1 is calculated f , these 64 water mist density fluxes V f Summarize in Table 1 and draw Figure 4 .

[0042] Table 1 64 water mist density flux V f

[0043]

[0044] From Table 1 and Figure 4 The water mist density flux distribution of the nozzle in this embodiment can be clearly and conveniently obtained.

[0045] In summary, the present invention has a reasonable design, a simple preparation method and the following advantages:

[0046] (1) Multiple unit water collection containers 1 are arranged in M ​​rows and N columns to form a water collection container system 7, which can flexibly arrange measurement devices according to local conditions and effectively apply to various water mist device scenarios;

[0047] (2) The unit gravity sensor 2 collects the water collection mass of each unit water collection container 1, and transmits the real-time data to the mass data collection terminal 4 for calculation to obtain the water mist density flux V of each unit water collection container 1. f , the water mist effects of different nozzles are presented in a temporal, visual and efficient manner.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A system for measuring the spatial dispersion of water mist flux, characterized in that: The invention comprises a water mist generating device (6), a water collecting container system (7) is arranged directly below the water mist generating device (6), a gravity sensor system (8) is arranged at the bottom of the water collecting container system (7), and the gravity sensor system (8) is connected to a mass data acquisition terminal (4) by wire or wireless; the water mist generating device (6) is connected to a synchronous time recorder (5) for recording the spraying time.

2. The water mist flux spatial dispersion measurement system according to claim 1, characterized in that: The water collection container system (7) comprises X unit water collection containers (1), the unit water collection containers (1) are arranged in M ​​rows and N columns, X=M×N; the gravity sensor system (8) comprises a plurality of unit gravity sensors (2), each unit water collection container (1) is equipped with a unit gravity sensor (2) at the bottom, and the unit gravity sensor (2) is connected to the quality data acquisition terminal (4).

3. The water mist flux spatial dispersion measurement system according to claim 1, characterized in that: The water mist generating device (6) is provided with a density tester (3) for detecting the density of the sprayed liquid.

4. A method for measuring the spatial dispersion of water mist flux, characterized in that: The measuring method uses the water mist flux spatial dispersion measuring system according to any one of claims 1 to 3, and the measuring method specifically comprises the following steps: Step S1, a water collection container system (7) is arranged directly below the nozzle in the water mist generating device (6), the water collection container system comprising a plurality of cubic unit water collection containers (1) with a side length of a, and a unit gravity sensor (2) is arranged under each unit water collection container (1) for measuring the amount of collected water; Step S2, arranging corresponding unit water collection containers (1) according to the actual space size and the spray radius of the nozzle, ensuring that the entire water collection container system (7) is located directly below the nozzle; Step S3, turning on the spray generating device and the synchronous time recorder (5) to record the spray time t; Step S4, each unit gravity sensor (2) transmits the collected data to the mass data collection terminal (4), the water collection mass of each unit water collection container (1) is m, and the mass data collection terminal (4) collects a total of X, and the water mist density flux V of each unit water collection container (1) is f =m / ρ / t / s; s=a 2 , where ρ is the density of the injected liquid.

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