CN210037352U

CN210037352U - Portable fire scene combustion improver sampling device

Info

Publication number: CN210037352U
Application number: CN201920607507.1U
Authority: CN
Inventors: 赵晓雷; 吕小宝; 王长富; 张玉荣; 龚幼兰; 戴维; 沈雯怡; 章一雄; 仇上
Original assignee: SHANGHAI INSTITUTE OF CRIMINAL SCIENCE AND TECHNOLOGY
Current assignee: SHANGHAI INSTITUTE OF CRIMINAL SCIENCE AND TECHNOLOGY
Priority date: 2019-04-29
Filing date: 2019-04-29
Publication date: 2020-02-07
Anticipated expiration: 2029-04-29

Abstract

The utility model relates to a portable conflagration scene combustion improver sampling device, include: a sampler, comprising: a sampler body; the connecting end is of a hollow structure and is integrally arranged at one end of the sampler body; the sampling end is of a hollow structure, is integrally arranged at the other end of the sampler body and is communicated with the inside of the connecting end; the adsorption rod is of a hollow structure made of adsorption materials and is inserted into the sampling end; and the air pump is connected with the connecting end of the sampler through a pipeline. Compared with the prior art, the device has small volume, is convenient to carry and sample the combustion improver in the fire scene; the sample thief can be equipped with a plurality of sampling ends, can insert a plurality of absorption sticks as required, is convenient for once gather a plurality of samples, can carry out accurate analysis and leave a kind, can gather the sample fast, and the sample is more high-efficient.

Description

Portable fire scene combustion improver sampling device

Technical Field

The utility model relates to a sampling device, concretely relates to on-spot combustion improver sampling device of portable conflagration.

Background

The investigation of the cause of fire in the fire (including fire release, self-ignition, etc.) site usually involves the extraction and analysis of the combustion residue in the site. The qualitative analysis of the combustion improver in the site combustion residues is required for the case and event characterization of a fire scene, and the artificial fire release can be mostly determined through the combustion improver inspection of the site combustion residues. In the case of artificial fire, most cases are gasoline cases, and the rest cases are organic solvents such as diluents or heavy mineral oil. The accurate extraction and rapid analysis of the combustion improver in the fire scene have important significance for the cause investigation of the fire and the qualitative detection work of cases.

At present, the extraction methods of the fire scene combustion improver residues mainly comprise a steam distillation method, a solvent extraction method, a headspace steam method, a passive headspace concentration method, a Solid Phase Microextraction (SPME), a dynamic headspace concentration method and an automatic thermal desorption method, the solid phase microextraction method and the automatic thermal desorption method are mostly applied in domestic laboratories at present, and the common extraction methods are laboratory extraction methods and are suitable for field combustion residues after extraction. The mature method for analyzing and evaluating the identification result to determine whether the sample contains the combustion improver and the residue thereof is judged by visually comparing the chromatograms of the sample and the comparison gasoline by an inspector, which is also a common method in a laboratory.

How to quickly and conveniently extract the combustion improver in the combustion residues on the fire scene is the key of quickly analyzing the cause of the fire and qualitatively detecting the case. At present, the extraction process of the combustion improver of the combustion residues on the fire scene at least has the following technical problems: a sampling device which is convenient to carry is not provided, most of the sampling devices are heavy, and the use is very inconvenient; a plurality of samples cannot be collected at one time, and accurate analysis and sample reservation are inconvenient; in the sampling process, samples cannot be effectively collected, so that subsequent analysis is difficult and the like.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the above problems and providing a portable scene of fire comburant sampling device to solve above-mentioned technical problem, realize that the scene of fire comburant is quick, high-efficient, convenient collection, bring the convenience for the criminal investigation work of conflagration.

The purpose of the utility model is realized through the following technical scheme:

a portable fire scene oxidant sampling device comprises:

a sampler, comprising:

a sampler body;

the connecting end is of a hollow structure and is integrally arranged at one end of the sampler body; and

the sampling end is of a hollow structure, is integrally arranged at the other end of the sampler body and is communicated with the inside of the connecting end;

the adsorption rod is of a hollow structure made of adsorption materials and is inserted into the sampling end; and

and the air pump is connected with the connecting end of the sampler through a pipeline.

This sampling device simple structure, small, convenient to carry are equipped with a plurality of collection ends to can set up a plurality of absorption sticks as required, once can gather a plurality of samples, the accurate analysis of being convenient for and leave a kind.

Furthermore, a communicating channel for communicating the connecting end with the sampling end is arranged in the sampler.

Furthermore, 4-8 sampling ends are arranged.

Further, the sampler body is flat cylinder, and the connecting end and the sampling end are both hollow cylinder.

Furthermore, an internal thread is arranged in the sampling end, and a bolt plug is arranged in a matching mode.

Furthermore, a sealing gasket used for being installed in a matched mode with the adsorption rod is further arranged in the sampling end.

Furthermore, the sampler is made of metal materials through integral forming.

Furthermore, the adsorption rod is in a hollow cylindrical shape, the inner layer is made of adsorption materials, and the outer layer is provided with a protective layer.

Further, the inner layer of the adsorption rod is made of polydimethylsiloxane, a mixture of activated carbon and polydimethylsiloxane or a mixture of polydimethylsiloxane and polydivinylbenzene or other materials with adsorption characteristics, and the protective layer is a glass sleeve.

Further, the air pump is a portable air pump, and Gastec GSP-300FT-2 is adopted.

The concrete theory of operation of this device does, when specifically using, loads the collection system front end one or more and has the adsorption function adsorb the stick, adsorbs the stick and is fixed in sample collection system's sampling port, and the collection system front end is equipped with the air pump, opens the air pump and inhales, with the on-the-spot combustion improver sample of conflagration through adsorbing the stick enrichment, after sample acquisition accomplished, takes off and adsorbs the stick and reserves or carry out the analysis.

Compared with the prior art, the utility model discloses following beneficial effect has: the sampler and the air pump are small in size, so that the sampler and the air pump are convenient to carry and sample the combustion improver on the fire scene; the sampler can be provided with a plurality of sampling ends, a plurality of adsorption rods can be inserted according to the needs, the adsorption rods are made of adsorption materials, samples are enriched, a plurality of samples can be collected conveniently at one time, and accurate analysis and sample reservation can be carried out; the adsorption rod is made of an adsorption material with a hollow structure, and is inserted into the sampling end of the sampler, so that the sample can be quickly enriched, the sampling is more efficient, and the follow-up accurate analysis is facilitated.

Drawings

FIG. 1 is a schematic view of the overall structure of the device of the present invention;

FIG. 2 is a schematic structural diagram of the sampler of the present invention;

FIG. 3 is a schematic cross-sectional view of the sampler of the present invention;

in the figure: the sampler comprises a sampler 1, an air pump 2, an adsorption rod 3, a pipeline 4, a sampler body 101, a sampling end 102, a connecting end 103, a bolt plug 104 and a sealing gasket 105.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Examples

Referring to fig. 1, a portable sampling device for a fire scene combustion improver comprises: a sampler 1, see fig. 2 and 3, comprising: a sampler body 101; a connecting end 103 which is a hollow structure and is integrally arranged at one end of the sampler body 101; the sampling end 102 is of a hollow structure, is integrally arranged at the other end of the sampler body 101 and is communicated with the inside of the connecting end 103; an adsorption rod 3, which is a hollow structure made of adsorption material and is inserted into the sampling end 102; and an air pump 2 connected with the connecting end 103 of the sampler 1 through a pipeline 4. During the specific use, load one or more adsorption rod 3 with the collection system front end, adsorption rod 3 is fixed in sampling collection system's sampling end 102, and the collection system front end is equipped with air pump 2, opens the suction of air pump 2, and the scene of fire combustion improver sample is through adsorbing 3 enrichment on the stick, and after the sample acquisition was accomplished, take off and adsorb stick 3 and keep or carry out the analysis.

Specifically, sample thief 1 makes for metal material integrated into one piece, and sample thief 1 is inside to be equipped with the communicating passageway of link 103 and sample end 102, and sample end 102 is equipped with 4, and sample thief body 101 is the oblate column shape, and link 103 is hollow circular cylinder with sample end 102, is equipped with the internal thread in the sample end 102 to the cooperation is equipped with bolt end cap 104, and the sample end 102 that will not use is sealed through bolt end cap 104 during the test.

The sampling end 102 is also internally provided with a sealing gasket 105 which is matched with the adsorption rod 3 and adopts an annular rubber gasket. The adsorption rod 3 is hollow cylinder, the inner layer is made of adsorption material, and the outer layer is provided with a protective layer. The inner layer of the adsorption rod 3 can be made of one of polydimethylsiloxane, a mixture of activated carbon and polydimethylsiloxane or a mixture of polydimethylsiloxane and polydivinylbenzene, or other materials with adsorption characteristics, and the protective layer is a glass sleeve. The air pump 2 is a portable air pump 2, and Gastec GSP-300FT-2 can be adopted.

The device has small volume, is convenient to carry and is convenient for sampling the combustion improver in the fire scene; the sampler can be provided with a plurality of sampling ends, a plurality of adsorption rods can be inserted according to the needs, the adsorption rods are made of adsorption materials, samples are enriched, a plurality of samples can be collected conveniently at one time, and accurate analysis and sample reservation can be carried out; the adsorption rod is made of an adsorption material with a hollow structure, and is inserted into the sampling end of the sampler, so that the sample can be quickly enriched, the sampling is more efficient, and the follow-up accurate analysis is facilitated.

The embodiments described above are intended to facilitate the understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention according to the disclosure of the present invention.

Claims

1. A portable fire scene combustion improver sampling device is characterized by comprising:

a sampler (1) comprising:

a sampler body (101);

the connecting end (103) is of a hollow structure and is integrally arranged at one end of the sampler body (101); and

the sampling end (102) is of a hollow structure, is integrally arranged at the other end of the sampler body (101), and is communicated with the inside of the connecting end (103);

an adsorption rod (3) with a hollow structure made of adsorption material and inserted into the sampling end (102); and

and the air pump (2) is connected with the connecting end (103) of the sampler (1) through a pipeline (4).

2. The portable fire scene oxidant sampling device of claim 1, characterized in that, the sampler (1) is internally provided with a communication channel which communicates the connecting end (103) with the sampling end (102).

3. The portable fire scene oxidant sampling device of claim 1, characterized in that the number of the sampling ends (102) is 4-8.

4. The portable fire scene oxidant sampling device of claim 1, characterized in that, the sampler body (101) is flat cylinder, and the connecting end (103) and the sampling end (102) are both hollow cylinder.

5. The portable fire scene oxidant sampling device of claim 1, characterized in that the sampling end (102) is internally provided with internal threads and is provided with a bolt plug (104) in a matching way.

6. The portable fire scene oxidant sampling device of claim 1, characterized in that the sampling end (102) is also internally provided with a sealing gasket (105) which is used for being matched and installed with the adsorption rod (3).

7. The portable sampling device for the combustion improver at the fire scene as claimed in claim 1, wherein the sampler (1) is made of metal material by integral molding.

8. The portable sampling device for the combustion improver at the fire scene as the claim 1 is characterized in that the adsorption rod (3) is hollow and cylindrical, the inner layer is made of adsorption material, and the outer layer is provided with a protective layer.

9. The portable fire scene oxidant sampling device of claim 8, wherein the inner layer of the adsorption rod (3) is made of one of polydimethylsiloxane, a mixture of activated carbon and polydimethylsiloxane or a mixture of polydimethylsiloxane and polydivinylbenzene, and the protective layer is a glass sleeve.

10. The portable fire scene oxidant sampling device of claim 8, characterized in that, the air pump (2) is a portable air pump, and Gastec GSP-300FT-2 is adopted.