CN213749701U

CN213749701U - Solid explosion comprehensive simulation device for trace material evidence identification

Info

Publication number: CN213749701U
Application number: CN202022693245.0U
Authority: CN
Inventors: 包任烈; 张磊; 张永丰; 曹丽英; 黄昊; 胡成
Original assignee: Shanghai Fire Research Institute of MEM
Current assignee: Shanghai Fire Research Institute of MEM
Priority date: 2020-11-19
Filing date: 2020-11-19
Publication date: 2021-07-20
Anticipated expiration: 2030-11-19

Abstract

The utility model relates to a solid explosion comprehensive simulation device for trace material evidence identification, which comprises a furnace body, wherein the side wall of the furnace body is provided with a pressure relief door, a flame combustion part is arranged in the furnace body, a sample disc is fixedly arranged above the flame combustion part, and a sample tube for storing an explosive sample is arranged in the sample disc; the top of the furnace body is provided with a water spraying part communicated with an external water source, and the water spraying part is aligned to the sample tray; the periphery and the bottom surface of the inner wall of the furnace body are provided with a plurality of baffles which are obliquely arranged. The utility model discloses environmental temperature in the time of steerable explosion and after the explosion in the definite time changes to the effect of steerable flame, fire water, in order to investigate the on-the-spot environment and remain the horizontally influence to the explosive. The method can accurately collect the matrixes at different distances and different directions from the explosion point so as to investigate the residual level of the explosives in the matrixes at different positions. Has the advantage that all the environmental elements can be simulated.

Description

Solid explosion comprehensive simulation device for trace material evidence identification

Technical Field

The utility model relates to a trace material evidence appraisal is with fixed explosion comprehensive simulation device.

Background

The explosive residues in the scene of an explosion fire accident are important evidence for investigation of the cause of the accident. The explosive residues may be attached to the explosion points, the throwout materials, the splashes, the smoke marks, the explosive dust and other objects near the explosion points, and the objects (substrates) possibly containing the explosive residues are collected during the investigation, and are pretreated by adopting corresponding technical means, and the explosive residue components are extracted and detected. Aiming at different substrates in the field, different pretreatment technologies are used; the type and shape of the substrate, the spatial position relationship between the substrate and an explosion point, the temperature of a fire scene, fire water and the like can also influence the residual level of explosives; these factors all affect the detection rate of explosive residues. The prior art also lacks a test device capable of simulating the environment of an explosion field.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming current analogue means can not simulate explosion conflagration site environment completely, can not accurate not enough of gathering experimental sample, provide one kind can simulate site environment, accurate collection experimental sample's solid explosion comprehensive simulation device.

The utility model adopts the following technical proposal:

a solid explosion comprehensive simulation device for trace material evidence identification comprises a furnace body 1, wherein a pressure relief door 2 is arranged on the side wall of the furnace body 1, a flame combustion part 3 is arranged in the furnace body 1, a sample disc 6 is fixedly arranged above the flame combustion part 3, and a sample tube 7 for storing an explosive sample is arranged in the sample disc; the top of the furnace body 1 is provided with a water spraying part 4 communicated with an external water source, and the water spraying part 4 is aligned to the sample disc 6; the periphery and the bottom surface of the inner wall of the furnace body 1 are provided with a plurality of baffles 8 which are obliquely arranged, and the baffles 8 are provided with holes for temporarily storing the objects splashed by the explosion.

Preferably, the sample plate 6 is supported by a sample table bracket 5, the sample table bracket 5 is placed in the furnace body 1, and the flame combustion part 3 is arranged in the space in the middle of the sample table bracket 5.

Preferably, the furnace body 1 is in a rectangular structure.

Preferably, the planar projection of the sample plate 6 is rectangular or circular in shape.

Preferably, the furnace body 1 is provided with a plurality of slots, and the baffle 8 is inserted into the slots for fixation.

Preferably, the flame combustion part 3 is positioned at the bottom in the furnace body 1, and the flame nozzle is aligned with the center of the sample plate 6.

Preferably, the furnace body 1 is provided with a furnace body thermal device.

Preferably, the flame combustion component 3 is remote-control ignition or remote-control ignition.

Further, the water spraying component 4 is controlled manually or mechanically.

Preferably, the sample plate 6 is a hollow metal mesh and is detachably fixed with the sample table bracket; the baffle 8 is a strip-shaped metal plate, a perforated metal plate or a hollow metal net.

The beneficial effects of the utility model reside in that:

1) the environmental temperature change during and after explosion can be controlled, and the effects of flame and fire water can be controlled to investigate the influence of the field environment on the residual level of the explosive.

2) The method can accurately collect the matrixes at different distances and different directions from the explosion point so as to investigate the residual level of the explosives in the matrixes at different positions. Has the advantage that all the environmental elements can be simulated.

Drawings

Fig. 1 is a front perspective view of the solid explosion comprehensive simulation device for trace physical evidence identification of the present invention.

Fig. 2 is a top cross-sectional view of the solid explosion comprehensive simulation device for trace physical evidence identification of the present invention.

In the figure, 1, a furnace body, 2, a pressure relief door, 3, a flame combustion part, 4, a water spraying part, 5, a sample table bracket, 6, a sample disc, 7, a sample tube and 8, a baffle plate.

Detailed Description

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

Referring to fig. 1-2, a solid explosion comprehensive simulation device for trace material evidence identification comprises a furnace body 1, wherein a pressure relief door 2 is arranged on the side wall of the furnace body 1, a flame combustion part 3 is arranged in the furnace body 1, a sample tray 6 is fixedly arranged above the flame combustion part 3, and a sample tube 7 for storing an explosive sample is arranged in the sample tray; the top of the furnace body 1 is provided with a water spraying part 4 communicated with an external water source, and the water spraying part 4 is aligned to the sample disc 6; the periphery and the bottom surface of the inner wall of the furnace body 1 are provided with a plurality of baffles 8 which are obliquely arranged.

In this embodiment, referring to fig. 1, the sample plate 6 is supported by a sample stage holder 5, the sample stage holder 5 is placed in the furnace body 1, and the flame combustion part 3 is provided in a space in the middle of the sample stage holder 5. The sample table bracket 5 is made of metal, the lower part of the sample table bracket is provided with a supporting leg, and the top of the sample table bracket is provided with a square or round metal ring. The sample plate 6 is a square or circular ring hollow metal net, the middle part of the sample plate is concave, and the edge of the sample plate is fixed with the sample table bracket 5 in a detachable mode.

In this embodiment, referring to fig. 1-2, the furnace body 1 is of a rectangular body structure.

In this embodiment, the planar projection of the sample plate 6 is rectangular or circular in shape, see fig. 2.

In this embodiment, referring to fig. 1, the furnace body 1 is provided with a plurality of slots, and the baffle 8 is inserted into the slots for fixing, and the specific shapes of the slots are not shown in fig. 1.

In this embodiment, referring to fig. 1, the flame burning part 3 is located at the bottom inside the furnace body 1 and the flame nozzle is aligned with the center of the sample plate 6.

In this embodiment, the furnace body 1 is provided with a furnace body thermal device. The controllable temperature ranges are: the temperature is between room temperature and 1500 ℃.

In this embodiment, the flame combustion part 3 is a remote ignition or a remote ignition-by-wire.

In this embodiment, the water spraying part 4 is controlled manually or mechanically.

In this embodiment, the sample tray 6 is a hollow metal mesh, and is detachably fixed to the sample stage bracket, which is not specifically shown in the drawings but can be understood and implemented by those skilled in the art; baffle 8 is rectangular shape metal sheet, trompil metal sheet or fretwork metal mesh for separate or splendid attire matrix, can adopt metal sheet, trompil metal sheet or fretwork metal mesh to the matrix of different grade type. As shown in fig. 2. The baffle 8 can be automatically arranged at the inserting position and the inserting quantity according to the experiment requirement.

The sample tube 7 is used for containing bulk explosives, and if the bulk explosives are not used, the sample tube 7 can be omitted and can be directly placed on the sample tray 6.

The baffle may be an apertured baffle in order to block the substrate while maintaining an open flow of gas. Larger sized substrates, such as stone, may be provided with perforated baffles or wire mesh baffles. While substrates of small particles, such as clay, cannot be used with perforated baffles or metal mesh baffles.

Specific examples are as follows:

example 1: and simulating a TNT explosion field, and inspecting the residual level of the explosive in the soil. Metal plate type baffles 8 are inserted into the bottom and the side surface in the furnace body 1, the bottom and the side surface are divided into different areas, and soil serving as a matrix is laid in each area. TNT sample was loaded into sample tube 7 and placed in the center of sample pan 6. The flame nozzle of the flame combustion part 3 is aligned with the sample tube 7, and is ignited by remote control until the sample explodes. Immediately starting the furnace body heating device after explosion, controlling the furnace body 5 to heat up to 1000 ℃ within 30 minutes, and keeping for 10 min. And (3) starting the water spraying part 4, and simultaneously closing the furnace body heating device, wherein the spraying time is 2 min. After cooling to room temperature, the soil in the different areas was removed for laboratory analysis.

Example 2: simulating the pyrotechnic composition explosion field, and investigating the explosive residue level on the surface of the cullet. Hollow metal mesh type baffles 8 are inserted into the bottom and the side surface in the furnace body 1, the bottom and the side surface are divided into different areas, and cullet serving as a substrate is laid in each area. The firecracker sample is directly placed in the center of the sample tray 6 without using the sample tube 7. The flame nozzle of the flame combustion part 3 is aligned with the sample, ignited by remote control and burned until the sample explodes. Immediately starting the furnace body heating device after explosion, controlling the furnace body 5 to heat up to 900 ℃ within 20 minutes, and keeping for 20 min. And (3) starting the water spraying part 4, and simultaneously closing the furnace body heating device, wherein the spraying time is 2 min. After cooling to room temperature, the cullet in the different zones was removed for laboratory analysis.

The utility model relates to a simulation device can simulate actual explosion scene of fire, establishes the basis for research explosive trace material evidence detects.

Claims

1. The utility model provides a trace material evidence appraisal synthesizes analogue means with solid explosion which characterized in that:

the device comprises a furnace body (1), wherein a pressure relief door (2) is arranged on the side wall of the furnace body (1), a flame combustion part (3) is arranged in the furnace body (1), a sample disc (6) is fixedly arranged above the flame combustion part (3), and a sample tube (7) for storing an explosive sample is arranged in the sample disc;

the top of the furnace body (1) is provided with a water spraying part (4) communicated with an external water source, and the water spraying part (4) is aligned to the sample disc (6);

the periphery and the bottom surface of the inner wall of the furnace body (1) are provided with a plurality of obliquely arranged baffles (8).

2. The solid explosion comprehensive simulation device for trace physical evidence identification according to claim 1, wherein: the sample tray (6) is supported by a sample table bracket (5), the sample table bracket (5) is placed in the furnace body (1), and the flame combustion part (3) is arranged in the space in the middle of the sample table bracket (5).

3. The solid explosion comprehensive simulation device for trace physical evidence identification according to claim 1, wherein: the furnace body (1) is of a rectangular structure.

4. The solid explosion comprehensive simulation device for trace physical evidence identification according to claim 1, wherein: the plane projection of the sample plate (6) is in a rectangular or circular shape.

5. The solid explosion comprehensive simulation device for trace physical evidence identification according to claim 1, wherein: the furnace body (1) is provided with a plurality of slots, and the baffle (8) is inserted into the slots for fixation.

6. The solid explosion comprehensive simulation device for trace physical evidence identification according to claim 1, wherein: the flame combustion part (3) is positioned at the bottom in the furnace body (1) and the flame nozzle is aligned with the center of the sample plate (6).

7. The solid explosion comprehensive simulation device for trace physical evidence identification according to claim 1, wherein: the furnace body (1) is provided with a furnace body heat device.

8. The solid explosion comprehensive simulation device for trace physical evidence identification according to claim 1, wherein: the flame combustion part (3) is ignited by remote control or remote control.

9. The solid explosion comprehensive simulation apparatus for trace physical evidence identification according to claim 8, wherein: the water spraying component (4) is manually controlled or mechanically controlled.

10. The solid explosion comprehensive simulation device for trace physical evidence identification according to claim 1, wherein: the sample plate (6) is a hollow metal mesh and is detachably fixed with the sample table bracket; the baffle (8) is a strip-shaped metal plate, a perforated metal plate or a hollow metal net.