CN208808485U - The automatic powder supply trace to take the fingerprint for scene of a crime powder method examines equipment - Google Patents
The automatic powder supply trace to take the fingerprint for scene of a crime powder method examines equipment Download PDFInfo
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- CN208808485U CN208808485U CN201721087387.4U CN201721087387U CN208808485U CN 208808485 U CN208808485 U CN 208808485U CN 201721087387 U CN201721087387 U CN 201721087387U CN 208808485 U CN208808485 U CN 208808485U
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Abstract
The utility model relates to a kind of automatic powder supply traces to take the fingerprint for scene of a crime powder method to examine equipment, and air pump is electrically connected with battery, and the outlet side of air pump is connected with powder bottle；Ultramicropore fluidized bed is installed in powder bottle, the top of ultramicropore fluidized bed is the trace inspection powder being placed in powder bottle, by air pump output have pressure air by ultramicropore fluidized bed lower section pass through ultramicropore fluidized bed, is formed multiple independent air-flows, act on trace inspection powder bottom, trace inspection powder surface generation mixed gas；One end of shell is equipped with the spray head with spout, brush head is equipped with around spout, the mixture pipe being tightly connected with spout is equipped in powder bottle, the mixed gas generated in powder bottle is sent by mixture pipe to spout brush head, and the trace in mixed gas examines powder contact to fingerprint trace and is adsorbed in fingerprint trace surface formation sharp image.The utility model improves the working environment of policeman while reducing the usage amount of powder, improving sampling operation efficiency.
Description
Technical field
The utility model belongs to trace detection tool in police criminal detection field, specifically a kind of to be used for scene of a crime powder
The automatic powder supply trace that last method takes the fingerprint examines equipment.
Background technique
Currently, the most popular method for scene of a crime fingerprint imaging and analysis is called powder visualization (-isa-), this in film or
Can often it see in TV.Investigator paints fine powder on fingerprint, then sticks shape and trace that adhesive tape obtains powder
Mark (the actually namely trace of fingerprint)；In this way, investigator can save finger print information to adhesive tape, to conveniently take back
It is analysed in depth in laboratory.If fingerprint stays in the surface of the unwetted property article such as metal, plastic cement, glass, ceramic tile, powder can be used
Last method, which takes the fingerprint, dips in a little powder with banister brush, gently plays brush handle, is scattered in powder equably on fingerprint, then shake off or
Excessive powder is flicked with brush point, colourless fingerprint can become coloured.Common powder has aluminium powder, iron powder, copper powder, graphite powder
Deng.It is a kind of easy, effective method that powder method, which takes the fingerprint,.But since used powder is mostly superfines, warp
After crossing a large amount of brush, powder largely suspends in air, very big to the physical impairment of professional technician；Moreover, using brush
Fingerprint surface is directly brushed, is easy fingerprint damage.
Utility model content
In order to solve because of the above problem caused by powder suspension air existing for existing powder visualization (-isa-), this is practical new
Type is designed to provide a kind of automatic powder supply trace inspection equipment to take the fingerprint for scene of a crime powder method.
The purpose of this utility model is achieved through the following technical solutions:
The utility model includes shell and the battery being separately mounted in the shell, air pump and powder bottle, air pump
It is electrically connected with battery, the outlet side of the air pump is connected with the powder bottle；Ultramicropore fluidized bed is installed in the powder bottle, it should
The top of ultramicropore fluidized bed is the trace inspection powder being placed in powder bottle, has pressure air by ultramicropore by what the air pump exported
The lower section of fluidized bed passes through ultramicropore fluidized bed, forms multiple independent air-flows, acts on trace inspection powder bottom, examines powder in trace
Top generates mixed gas；One end of the shell is equipped with the spray head with spout, is equipped with brush head around the spout, brush head encloses
At inner space be the hairbrush spray canister being connected with spout；The gaseous mixture being tightly connected with the spout is equipped in the powder bottle
Pipe, the interior mixed gas generated of powder bottle are sent to nozzle by the mixture pipe, again through hairbrush spray canister ejection, gaseous mixture
Trace in body examines powder contact to fingerprint trace and is adsorbed in fingerprint trace surface formation sharp image；
Wherein: tracheae is equipped in the powder bottle, the upper end of the tracheae is connected with the outlet side of the air pump, and lower end is inserted
Be located on the ultramicropore fluidized bed and be connected below the ultramicropore fluidized bed, air pump output has pressure empty
Gas is sent by the tracheae to the lower section of ultramicropore fluidized bed；
The upper end of the mixture pipe is located in powder bottle and is equipped with disperser, and the lower end of the mixture pipe is by the powder bottle
It is pierced by, is tightly connected with the spout；Spout junction on the mixture pipe lower end and spray head is equipped with sealing ring；
Multiple return air holes are circumferentially about evenly equipped in spout on the spray head, each return air hole is located at the brush head
The periphery of installation site on spray head；Strainer is equipped between the spray head and powder bottle, which is located at the upper of each return air hole
Side；One end of the shell be equipped with powder bottle cap, the other end be equipped with battery cover, the powder bottle cap in a ring, the axial direction of lower openings
Section is in "eight" shape, and the edge on the "eight" shape top is located at the periphery of each return air hole；
It is equipped with switchboard and electric-controlled plate in the shell, is separately installed with speed regulation, power switch and work on the switchboard
Switch, the electric-controlled plate are electrically connected and on the route of connection equipped with the operating switch with battery, the air pump with it is automatically controlled
Plate electrical connection is simultaneously equipped with the speed regulation, power switch in connection line.
The advantages of the utility model and good effect are as follows:
1. trace inspection powder is uniformly mixed with air automatically and sent to trace inspection working face by the utility model carries out trace inspection sampling,
Brush head in addition to playing the role of development and fixing, the hairbrush spray canister surrounded by brush head also and meanwhile play protection trace inspection powder be lost
Effect prevents harmful powder to scatter and disappear under the protection of the hairbrush spray canister surrounded by brush head and diffuses in air, solves original
Hairbrush glue powder then work in powder scatter and disappear it is more pollution surrounding air mode of operation.
2. the powder bottle of the utility model is built in shell, main machine structure is simplified, is facilitated and is changed a bottle program, solves more
It changes powder bottle misoperation and easily causes the phenomenon that trace inspection powder is lost in work.
3. the utility model, which is adsorbed on the powder on brush head, to be sprayed mixed gas again using redevelopment is carried out
The part that do not develop during out is supplemented, so that trace inspection achievement is more perfect.
4. the utility model is provided with trace and examines powder recovering device, what is be discharged after brush head filters has pressure air to pass through again
The return air hole recycling filtering for being located at brush head periphery is crossed, cleans air more.
5. the utility model fundamentally solves powder pollution, improves the working environment of policeman while reducing powder
The usage amount at end improves sampling operation efficiency.
Detailed description of the invention
Fig. 1 is the internal structure cross-sectional view of the utility model；
Fig. 2 is the right side view of Fig. 1；
Fig. 3 is the surface structure schematic diagram of the utility model
Fig. 4 is the right view of Fig. 3；
Fig. 5 is that the utility model takes away the explosive view after shell；
Fig. 6 is the structural schematic diagram of the utility model operating position；
Fig. 7 is the working state figure of the utility model；
Wherein: 1 is battery, and 2 be electric-controlled plate, and 3 be air pump, and 4 be speed regulation, power switch, and 401 close gear for switch,
402 be weak shelves gear, and 403 be prime time gear, and 5 be switchboard, and 6 be operating switch, and 7 be powder bottle, and 8 be mixture pipe, and 9 be gas
Pipe, 10 be ultramicropore fluidized bed, and 11 be sealing ring, and 12 be strainer, and 13 be brush head, and 14 be return air hole, and 15 be disperser, and 16 be electricity
Chi Gai, 17 be powder bottle cap, and 18 examine working face for trace, and 19 be hairbrush shell, and 20 be spray head, and 21 be mounting plate, and 22 be shell.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing.
As shown in figs. 1 to 6, the utility model include shell 22 and the battery 1 being separately mounted in the shell 22, it is automatically controlled
Plate 2, air pump 3, operating switch 6, switchboard 5, powder bottle 7 and speed regulation, power switch 4, wherein shell 22 be hollow structure, one
End is equipped with spray head 20 and is connected with powder bottle cap 17 at the end, and the other end of shell 22 is equipped with battery cover 16.
Battery 1 is placed in the top in shell 22, and air pump 3 is located at the lower section of battery 1, and is electrically connected with battery 1.Switch
Speed regulation, power switch 4 and operating switch 6 are separately installed on plate 5, electric-controlled plate 2 is electrically connected with battery 1 and in the route of connection
It is equipped with operating switch 6, air pump 3 is electrically connected with electric-controlled plate 2 and is equipped with speed regulation, power switch 4 in connection line.Air
Pump 3 is provided with pressure air, and body of calming the anger is provided with after air is compressed and is used for powder bottle 7.The air pump 3 of the utility model is unloaded
Flow is 15cm3/ s, gas outlet maximum working pressure (MWP) are 0.03mpa.When work, unloaded current rate is divided into two grades；That is, switch
It is divided into three gears on plate 5, it is exactly 3 varying strength air-flow of air pump that one, which closes gear 401, second and third for switch,
Two gears, respectively weak shelves gear 402 and prime time gear 403；The air flow rate of weak shelves gear 402 is 8cm3/ s, prime time
The air flow rate of gear 403 is 12cm3/s.Working strength pushes when can examine powder loose density and work according to different traces
Speed regulation, power switch 4 arrive different stalls, to adjust the air-flow size of mixed gas.
Powder bottle 7 is located at the lower section of air pump 3, be respectively equipped with inside the powder bottle 7 tracheae 9, mixture pipe 8, disperser 15 and
Ultramicropore fluidized bed 10, ultramicropore fluidized bed 10 are set to the lower part in powder bottle 7, and the upper end of tracheae 9 is fixed by mounting plate 21
In powder bottle 7, lower end is plugged on ultramicropore fluidized bed 10 and is connected with the lower section of the ultramicropore fluidized bed 10；Ultramicropore
The top of fluidized bed 10 is the trace inspection powder being placed in powder bottle 7.Powder bottle 7 is connected with the outlet side of air pump 3, the portion of connection
Quartile is in the top of mounting plate 21, and the upper end of tracheae 9 is connected with the connected component, and the body of calming the anger that air pump 3 exports can
To send by tracheae 9 to the lower section of ultramicropore fluidized bed 10.Mixture pipe 8 is located at the middle part in powder bottle 7, longitudinal center line and gas
The longitudinal center line of pipe 9 is parallel.The upper end of mixture pipe 8 is located in powder bottle 7 and is equipped with disperser 15, the mixture pipe 8
Lower end is pierced by by powder bottle 7, is tightly connected with the spout opened up on spray head 20.Spout on 8 lower end of mixture pipe and spray head 20 connects
It meets place and is equipped with sealing ring 11, for realizing sealing.It is equipped with strainer 12 in the periphery of sealing ring 11, which is located at spray head 20
Between the bottom of powder bottle 7.
The space of the top of mounting plate 21 for thering is pressure air to proceed in powder bottle 7 of air pump 3, then by tracheae 9 send to
The lower section of ultramicropore fluidized bed 10, and ultramicropore fluidized bed 10 is passed through by the lower section of ultramicropore fluidized bed 10, it is formed numerous only
Tiny air-flow is found, trace inspection powder bottom is acted on, floats trace inspection powder in " boiling " state, is generated on trace inspection powder surface
It suspends and diffuses the mixed gas of type, mixed gas enters in mixture pipe 8 by disperser 15, is sent to spout.This is practical
Novel trace inspection powder loose density is 0.5~1.0g/cm3, fineness is between 500~800 mesh；Ultramicropore fluidized bed surpasses
Pore density is≤1000 mesh, diameter 15mm, with a thickness of 2mm.
Spout on spray head 20 is located at intermediate position, is equipped with brush head 13, the inner space that brush head 13 surrounds around spout
For the hairbrush spray canister 19 being connected with spout.Multiple return air holes 14 are circumferentially about evenly equipped in spout on spray head 20, each time
Air holes 14 is located at the periphery of the installation site on spray head 20 of brush head 13.Strainer 12 is located at the top of each return air hole 14.Powder bottle cap 17
In a ring, the axial cross section of lower openings is in "eight" shape, and the edge on the "eight" shape top is located at the periphery of each return air hole 14.
The disperser 15 of the utility model is the prior art, is made of the white steel mesh of metal, is in cylinder column.Root in production
According to the difference of powder sort and manufacturer's product, may be selected to make using the white steel mesh of metal of different sealing.
The powder supply method of the utility model are as follows:
As shown in fig. 7, the brush head 13 of automatic powder supply trace inspection equipment is erect downward when work, public security cadres and police's tradition is maintained
Trace examine gimmick；Included angle A between automatic powder supply trace inspection equipment and trace inspection working face 18 is greater than 45 °, it is ensured that best work
State.
Working face 18 is examined using glass as trace, after pressing fingerprint on glass, the silver powder used using criminal investigation is as trace
Powder is examined, is fitted into powder bottle 7.When work, brush head 13 is directed at the trace acquisition face on trace inspection working face 18, presses operating switch 6,
Start air pump 3, speed regulation, power switch 4 are closed into shelves by switch and are adjusted to weak 402 (8cm of shelves gear3/ s), there is pressure air by sky
The outlet side of air pump 3 exports to the space of 21 top of mounting plate in powder bottle 7, then is sent by tracheae 9 to ultramicropore fluidized bed 10
Lower section, and by the lower section of ultramicropore fluidized bed 10 pass through ultramicropore fluidized bed 10, form the tiny air-flow of numerous independence, make
Powder bottom is examined used in trace, floats trace inspection powder in " boiling " state, suspends in trace inspection powder surface generation and diffuse the mixed of type
Gas is closed, mixed gas enters in mixture pipe 8 by disperser 15, is sent to spout ejection.The trace inspection powder of ejection is straight
It connects and strikes on trace inspection working face 18, a part of trace inspection powder adsorption examines working face 18 in trace, shows that the trace left clearly
Reveal and, another part trace inspection powder is circled round under the action of air-flow in the mixing in hairbrush spray canister 19, and with nozzle ejection
Gas converges, shock trace inspection working face 18 can see the clear fingerprint of previous press on glass surface repeatedly again.
At the same time, when some mixed gas passes through brush head 13, trace is examined powder and is adsorbed by the bristle of brush head 13, calms the anger body then
It is expelled in surrounding air after bristle filters.In use, speed regulation, power switch can be adjusted to prime time shelves according to working strength
Powder supply amount is improved in position 403.
It strikes on trace inspection working face 18 and is attached to the trace inspection powder on trace inspection working face 18, since powder is micro thin
Piece flocculent substance is in irregular status, and the reflection to light is in scattering state, and observation is unobvious, utilizes the light sweeping of brush head 13
Work can make trace inspection powder regularly be attached to trace inspection working face 18, improve light reflection efficiency, reduce scattering light, make to acquire
Trace be more clear.The trace inspection powder being attached on brush head 13 can play the role of redevelopment during gently sweeping, right
The part that do not develop during mixed gas sprays is supplemented, so that trace inspection achievement is more perfect.Brush head 13 is same
When also act as block filtering trace inspection powder effect, by part trace inspection powder control inside hairbrush spray canister 19, avoid excessive dirt
Environment is contaminated, policeman's body is damaged.
After mixed gas is filtered by brush head 13, have in pressure air there are also seldom trace inspection powder, the utility model from
Dynamic powder supply trace inspection equipment has opened up multiple return air holes 14 on the spray head 20 on 13 periphery of brush head, using air pump 3 at work into
The negative pressure that port generates sucks the air around brush head 13, filters through filter screen 12, filters off remaining trace inspection powder, makes
Air more cleans.
Claims (7)
1. a kind of automatic powder supply trace inspection equipment to take the fingerprint for scene of a crime powder method, it is characterised in that: including shell
(22) and the battery (1), air pump (3) and the powder bottle (7) that are separately mounted in the shell (22), air pump (3) and battery
(1) it is electrically connected, the outlet side of the air pump (3) is connected with the powder bottle (7)；Ultramicropore stream is installed in the powder bottle (7)
Change bed (10), the top of the ultramicropore fluidized bed (10) is the trace inspection powder being placed in powder bottle (7), by the air pump (3)
Output has pressure air to pass through ultramicropore fluidized bed (10) by the lower section of ultramicropore fluidized bed (10), form multiple independent gas
It flows, act on trace inspection powder bottom, generate mixed gas above trace inspection powder；One end of the shell (22) is equipped with band spout
Spray head (20), be equipped with brush head (13) around the spout, the inner space that brush head (13) surrounds is connected with spout
Hairbrush spray canister (19)；The mixture pipe (8) being tightly connected with the spout is equipped in the powder bottle (7), what is generated in powder bottle (7) is mixed
It closes gas to send by the mixture pipe (8) to nozzle, spray through the hairbrush spray canister (19) again, the trace in mixed gas is examined
Powder contact is to fingerprint trace and is adsorbed in fingerprint trace surface formation sharp image.
2. the automatic powder supply trace inspection equipment to take the fingerprint according to claim 1 for scene of a crime powder method, feature exist
In: tracheae (9) are equipped in the powder bottle (7), the upper end of the tracheae (9) is connected with the outlet side of the air pump (3), lower end
Be plugged on the ultramicropore fluidized bed (10) and be connected below the ultramicropore fluidized bed (10), the air pump (3)
Output has pressure air to send by the tracheae (9) to the lower section of ultramicropore fluidized bed (10).
3. the automatic powder supply trace inspection equipment to take the fingerprint according to claim 1 for scene of a crime powder method, feature exist
Be located in powder bottle (7) in: the upper end of the mixture pipe (8) and be equipped with disperser (15), the lower end of the mixture pipe (8) by
The powder bottle (7) is pierced by, is tightly connected with the spout.
4. the automatic powder supply trace inspection equipment to take the fingerprint according to claim 3 for scene of a crime powder method, feature exist
In: the spout junction on mixture pipe (8) lower end and spray head (20) is equipped with sealing ring (11).
5. the automatic powder supply trace inspection equipment to take the fingerprint according to claim 1 for scene of a crime powder method, feature exist
In: being circumferentially about evenly equipped with multiple return air holes (14) in spout on the spray head (20), each return air hole (14) are located at
The periphery of brush head (13) installation site on spray head (20)；Strainer (12) are equipped between the spray head (20) and powder bottle (7),
The strainer (12) is located at the top of each return air hole (14).
6. the automatic powder supply trace inspection equipment to take the fingerprint according to claim 5 for scene of a crime powder method, feature exist
In: one end of the shell (22) is equipped with powder bottle cap (17), and the other end is equipped with battery cover (16), and the powder bottle cap (17) is in ring
Shape, the axial cross section of lower openings are in "eight" shape, and the edge on the "eight" shape top is located at the outer of each return air hole (14)
It encloses.
7. the automatic powder supply trace inspection equipment to take the fingerprint according to claim 1 for scene of a crime powder method, feature exist
In: it is equipped with switchboard (5) and electric-controlled plate (2) in the shell (22), is separately installed with speed regulation on the switchboard (5), power supply is opened
(4) and operating switch (6) are closed, the electric-controlled plate (2) is electrically connected with battery (1) and is equipped with the work on the route of connection
It switchs (6), the air pump (3) is electrically connected with electric-controlled plate (2) and is equipped with the speed regulation, power switch in connection line
(4)。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721087387.4U CN208808485U (en) | 2017-08-28 | 2017-08-28 | The automatic powder supply trace to take the fingerprint for scene of a crime powder method examines equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721087387.4U CN208808485U (en) | 2017-08-28 | 2017-08-28 | The automatic powder supply trace to take the fingerprint for scene of a crime powder method examines equipment |
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| Publication Number | Publication Date |
|---|---|
| CN208808485U true CN208808485U (en) | 2019-05-03 |
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ID=66267158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721087387.4U Active CN208808485U (en) | 2017-08-28 | 2017-08-28 | The automatic powder supply trace to take the fingerprint for scene of a crime powder method examines equipment |
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| CN (1) | CN208808485U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109419513A (en) * | 2017-08-28 | 2019-03-05 | 大连圣迈新材料有限公司 | The automatic powder supply trace inspection equipment and its powder supply method to take the fingerprint for scene of a crime powder method |
-
2017
- 2017-08-28 CN CN201721087387.4U patent/CN208808485U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109419513A (en) * | 2017-08-28 | 2019-03-05 | 大连圣迈新材料有限公司 | The automatic powder supply trace inspection equipment and its powder supply method to take the fingerprint for scene of a crime powder method |
| CN109419513B (en) * | 2017-08-28 | 2020-12-08 | 大连圣迈新材料有限公司 | Automatic powder supply trace detection equipment for extracting fingerprints by powder method on crime scene and powder supply method thereof |
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