Unlock instant, AI-driven research and patent intelligence for your innovation.

Detection method for liquid combustible material in fire scene environment

A detection method and liquid technology, applied in the direction of measuring devices, material absorption weighing, instruments, etc., can solve the problems of difficult detection of flammable liquid components, difficulties in the inspection and identification of combustion aids, and volatile combustion aids, etc., to achieve huge Economic value and social value, simple manufacturing process, low cost effect

Active Publication Date: 2016-06-22
新疆警察学院
View PDF3 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the premise of using most of the existing identification methods is that the fire is extinguished in time, the fire scene is not seriously burned, and the extracted samples are required to be very pure and cannot be polluted, otherwise it is not easy to detect the remaining flammable liquid components in the fire scene
However, the fire scene is complex, most of which are changing sites, and the on-site combustion accelerant is volatile and subject to external pollution, which brings difficulties to the inspection and identification of the combustion accelerant in the fire scene

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Detection method for liquid combustible material in fire scene environment
  • Detection method for liquid combustible material in fire scene environment
  • Detection method for liquid combustible material in fire scene environment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] A method for detecting liquid combustibles in a fire environment: select metal materials at the fire site, accurately weigh them, and put them in an experimental container, and test the weight gain of the metal materials after the fire is affected to determine whether the fire is Caused by liquid combustibles.

[0076] The method for detecting liquid combustibles in the fire environment is specifically the gravimetric method, that is, after the metal material is subjected to high temperature and corrosive medium, the weight change of the material before and after corrosion is compared to determine the corrosion rate to determine whether there is combustible; It is known that the weight gain rate of the material after corrosion is 2 times or more than the value of the weight gain rate in the air under the same test temperature and time conditions (the case where the weight gain is not obvious due to peeling is also considered, and this situation is regarded as an increase T...

Embodiment 2

[0107] Example 2: The size of the sample is Φ30mm×3mm. The sample is cleaned with acetone and alcohol, weighed in advance, and put into the liquid combustible device in the fire environment, and pressed to the wall level at a distance of 1 meter, within 0.5 meters of the device, without obstructions , To the level of the air outlet of the building, installed horizontally, and experimented in a simulated fire environment with gasoline as the combustion-supporting agent. The experiment temperature was 900℃. The following results can be seen from the oxidation weight gain rate. The alloy is oxidized at 20 minutes The weight gain rate is obviously different from that in the air, which is more than twice the weight gain rate in the air. When liquid combustibles exist in the environment, the alloy surface has dark green patina (Cu 2 (OH) 2 CO 3 ); When oxidized in the air, only black copper oxide (CuO) and bright red suboxide (Cu 2 O). The presence of combustion aid can be clearly de...

Embodiment 3

[0108] Example 3: The size of the sample is Φ30mm×3mm. The sample is cleaned with acetone and alcohol, weighed in advance, and placed in a liquid combustible device in the fire environment, and pressed to the wall level at a distance of 1 meter, within 0.5 meters of the device, without obstructions , To the level of the air outlet of the building, installed horizontally. The experiment was carried out in a simulated fire environment with gasoline as the combustion-supporting agent. The experiment temperature was 1000℃. The following results were obtained. From the oxidation weight gain rate, it can be seen that the alloy is The oxidative weight gain rate is obviously different from that in the air, which is more than twice the weight gain rate in the air. When liquid combustibles exist in the environment, the alloy surface has dark green patina (Cu 2 (OH) 2 CO 3 ); When oxidized in the air, only black copper oxide (CuO) and bright red suboxide (Cu 2 O). The presence of combusti...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

A detection method for a liquid combustible material in a fire scene environment comprises the steps that a metal material of a fire scene is selected, accurately weighed and put into an experiment container, and whether a fire disaster is caused by a liquid combustible material or not is determined through weight increment detection of the metal material influenced by the fire disaster. According to the detection method, a detection device for a liquid combustible material in a fire scene environment is used for detecting the atmosphere of a fire scene environment in real time, and obtained data is reliable and effective. Compared with a currently-used fire scene combustible liquid residue analyzing technology, the technical content is easy to achieve, the requirement for a sample is not high, and the detection method is more effective especially in a scene where an analyzing technology for water bubbles and other combustible liquid residues is difficult to apply, and is capable of being widely applied to identifying a combustion improver in a fire scene, simple in manufacturing process, low in cost and wide in popularization prospect.

Description

Technical field [0001] The invention belongs to a detection method, in particular to a detection method of liquid combustibles in a fire environment. Background technique [0002] In the prior art, for the detection of fire field evidence, the main method currently adopted at home and abroad is to detect the presence of unburned or lightly overfired flammable liquid from the fire residue. And based on this, a variety of analysis methods are used for analysis. However, most of the existing identification methods are based on the premise that the fire is put out in time, the fire site is not burned seriously, and the extracted samples are required to be very pure and cannot be contaminated, otherwise it is difficult to detect the remaining flammable liquid components in the fire site. However, the fire site is complex, most of which are changed sites. The on-site combustion-supporting agent is volatile and subject to external pollution, which brings difficulties to the inspection ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/00G01N5/02
CPCG01N5/00G01N5/02
Inventor 谢冬柏邓时单国刘轶张凯吕石磊吾提克尔·吾守尔
Owner 新疆警察学院