CN105606648A - Portable fire disaster test heat release rate measuring device - Google Patents

Abstract

The invention discloses a portable fire disaster test heat release rate measuring device which comprises an oil plate, a heat insulation layer, weighing modules, a weight transmitter, a data processing device and a displayer. The oil plate is put on a plurality of weighing modules, the heat insulation layer is arranged between the oil plate and the weighing modules, the weight transmitter is connected with the weighing modules, weight signals of the weighing modules are converted into digital signals, the data processing device is connected with the weight transmitter and calculates the heat release rate through a formula according to the received digital signals, and the heat release rate is displayed by the displayer.

Description

A kind of portable fire test HRR measurement mechanism

Technical field

The present invention relates to a kind of portable fire test HRR measurement mechanism, be mainly used in fireLarger on-the-spot fire test.

Background technology:

It is to describe fire mistake that fire can cause to human society with naturally huge destruction, HRRAn important parameter of journey, how much exergonic it has embodied in fire, is to determine fire development and fireThe basic parameter of calamity danger, its unit is generally kw, the energy discharging in the representation unit time, fireIn scientific experimentation, need to measure HRR temporal evolution, thus fire size is quantized pointAnalyse.

The experiment measuring that carries out combustible HRR in large scale fire is significant, becauseThe experiment of large scale can fire hazard environment that is virtually reality like reality, and test result is reliable, the experiment of large scaleNot only can evaluate combustible more real behavior rule in fire, also can synchronously investigate combustibleThe variation of the surrounding environment fire dynamics parameter causing.

At present, in examination fire test, the approach of combustible HRR mainly contains three kinds:

1) empirical equation method: for burning things which may cause a fire disaster such as oil sump fire, grillage fire, more existing classical formulas are to itHRR is estimated, but its shortcoming is to estimate peak heat rate of release, can not reflect fireThe time dependent characteristic of source rate of heat release, therefore its predict the outcome and real data between errorGreatly;

2) oxygen consumption principle method: know according to a large amount of fire test data, in most of fuel combustion processThe energy that consumption unit mass oxygen produces is about 13.1MJ/kg, therefore can be according to oxygen in combustion productGas change in concentration is calculated heat release rate. But these class methods need large-scale exhaust fume collecting hood, essence conventionallyReally collect combustion product gases, and need supporting high-precision gas constituent analysis equipment, and field trial baseOriginally can not reach this requirement;

3) weight-loss method: loss is measured in real time to quality of fuel, obtains mass loss rate, thenThe combustion heat value that is multiplied by fuel calculates,

$Q={\mathrm{\χ\ΔH}}_c\stackrel{\·}{m}---\left(1\right)$

In formula, Q is HRR, and χ is fuel economy, Δ H_cFor fuel combustion calorific value,FireSource quality loss speed.Need to use the weighing system system measure in real time, obtain fuelMass loss rate. Application weight-loss method mainly relies on the commercial electronic balance of purchase to damage fuel mass at presentLose data and measure, but conventional electronic balance general size fixes, cannot be according to fuel in testArea change and regulate weighing operation process complexity, and volume is heavy is inconvenient to carry. SeparatelyUse the conventional electronic balance time dependent rule of quick obtaining HRR at the scene outward,Rule, for the particularly inconvenience of the on-the-spot fire test of large scale.

Summary of the invention

The object of the present invention is to provide a kind of easy to carry and can Quick for HRR in timeThe fire test HRR measurement mechanism of Changing Pattern.

Portable fire test HRR measurement mechanism provided by the invention comprises for contain fuelFood tray and thermal insulation layer, Weighing module, weight transmitter, data processing equipment and display,Described food tray is placed on several Weighing modules, between food tray and Weighing module, is provided with thermal insulation layer, described inWeight transmitter is connected with Weighing module, and the weight signal of Weighing module is converted into data signal, instituteState data processing equipment and be connected with weight transmitter, the data signal receiving is passed through to formulaCalculate HRR and shown by display, in formula: Q is HRR, and χ isFuel economy, Δ H_cFor fuel combustion calorific value,For fuel mass loss speed.

Further, between thermal insulation layer and Weighing module, be provided with support bracket.

Further, food tray is combined by multiple food trays.

Further, Weighing module is four.

Further, data processing equipment is connected by blue teeth wireless with weight transmitter.

Heat release rate data can be calculated, show and be stored to apparatus of the present invention in real time, thereby can be existingThe time dependent rule of quick obtaining HRR, in addition, apparatus of the present invention are simple in structure,Simple operation, precision is higher and be easy to carry, and can be applicable to the burning things which may cause a fire disaster of different sizes, is particularly useful forThe on-the-spot fire test of large area.

Brief description of the drawings

Fig. 1 is the structural representation of the embodiment of the present invention 1.

Fig. 2 is the exploded view of structure shown in Fig. 1.

Fig. 3 is the structural representation of the embodiment of the present invention 2.

Fig. 4 is the exploded view of structure shown in Fig. 3.

Each part in Fig. 1, Fig. 3 all draws by transparent member, so that represent structure.

In figure: 1-data processing equipment, 2-food tray, 3-thermal insulation layer, 4-Weighing module5-weight transmitter, 6-display, 7-Bluetooth signal transmitter, 8-support bracket

Detailed description of the invention

Embodiment 1

As shown in Figure 1 and Figure 2, the present invention includes data processing equipment 1, food tray 2, thermal insulation layer 3,Weighing module 4, weight transmitter 5 and display 6, food tray 2 is placed on four Weighing modules 4,For contain fuel, in order to realize the thermal insulation protection to Weighing module 4, at food tray 2 and Weighing module 4Between be provided with thermal insulation layer 3, thermal insulation layer 3 can adopt fire-resistant gypsum panel, ca silicate fibre plate etc. Weight becomesSend device 5 to be connected with four Weighing modules 4 and data processing equipment 1 by wire, by the weight receivingAfter amount signal is converted into data signal, pass to data processing equipment 1, data processing equipment 1 is pressed formulaCalculate HRR and shown by display 6, in formula: Q is HRR, χFor fuel economy, Δ H_cFor fuel combustion calorific value,For fuel mass loss speed.

Described data processing equipment 1 can adopt the Programmable Logic Controller PLC of external connection keyboard, can before testBased on fuel character is set the combustion heat value Δ H of pluralities of fuel_cWith efficiency of combustion χ, and preset by keyboardIn PLC, when calculating, first calculates according to the adjacent twice fuel mass data signal receiving PLCGo out fuel mass loss speedAnd then according to formulaAutomatically calculate HRRQ, data signal gathers once for every 2 seconds, and the HRR Q at every turn calculating is presented at and PLCOn connected display, thus the time dependent rule of quick obtaining HRR at the scene.The HRR Q at every turn calculating also can be stored in mobile storage medium (as USB flash disk) in real time.

Weighing module 4 in the present invention and weight transmitter 5 can directly be bought from market.

Embodiment 2

As shown in Figure 3, Figure 4, the present invention includes data processing equipment 1, food tray 2, thermal insulation layer 3,Weighing module 4, weight transmitter 5, display 6, Bluetooth signal transmitter 7 and support bracket 8,Support bracket 8 is placed on four Weighing modules 4, and thermal insulation layer 3 covers on support bracket 8, everyThermosphere 3 can adopt the thermal insulation inorganic materials such as asbestos, rock wool, mineral wool. Food tray 2 is placed on thermal insulation layer 3Upper, for contain fuel, in the present embodiment, food tray 2 is combined by two food trays, is mainly used inLarge area combustion site. Weight transmitter 5 is connected with four Weighing modules 4 by wire, will receiveTo weight signal be converted into data signal. The data processing equipment 1 of the present embodiment adopts and is connected with keyboardSingle-chip microcomputer, single-chip microcomputer is built-in with bluetooth and accepts module, weight transmitter 5 is connected with Bluetooth signal and sends outSend device 7, data processing equipment 1 is accepted module and Bluetooth signal transmitter 7 and heavy by built-in bluetoothTransmitter 5 wireless connections.

In the same manner as in Example 1, can based on fuel character before test set the combustion heat value Δ H of pluralities of fuel_cWith efficiency of combustion χ, and be preset in single-chip microcomputer by keyboard, when single-chip microcomputer calculates, first basis receivesAdjacent twice fuel mass data signal calculate fuel mass loss speedAnd then according to public affairsFormulaAutomatically calculate HRR Q, data signal gathers once for every 2 seconds, calculates at every turnThe HRR Q going out is presented on the display 6 being connected with PLC, thereby can obtain fast at the sceneThe time dependent rule of heat-obtaining rate of release. The HRR Q at every turn calculating also can store in real timeIn mobile storage medium (as USB flash disk).

The above is only the good embodiment of the present invention, but protection scope of the present invention is not limited toIn this, any improvement of carrying out based on the solution of the present invention and design and replacement all should be encompassed in the present inventionProtection domain in.

Claims (5)

1. a portable fire test HRR measurement mechanism, comprises food tray, fires for splendid attireMaterial, is characterized in that: also comprise thermal insulation layer, Weighing module, weight transmitter, data processing equipmentAnd display, described food tray is placed on several Weighing modules, between food tray and Weighing module, be provided with everyThermosphere, described weight transmitter is connected with Weighing module, and the weight signal of Weighing module is converted into numberWord signal, described data processing equipment is connected with weight transmitter, and the data signal receiving is passed throughFormula calculates HRR and is shown by display.

2. portable fire test HRR measurement mechanism according to claim 1, its spyLevy and be: between described thermal insulation layer and Weighing module, be provided with support bracket.

3. portable fire test HRR measurement mechanism according to claim 2, its spyLevy and be: described food tray is combined by multiple food trays.

4. portable fire test HRR measurement mechanism according to claim 1 and 2,It is characterized in that: Weighing module is four.

5. portable fire test HRR measurement mechanism according to claim 1 and 2,It is characterized in that: described data processing equipment is connected by blue teeth wireless with weight transmitter.