CN112304666B

CN112304666B - Trace explosive detector

Info

Publication number: CN112304666B
Application number: CN202011366967.3A
Authority: CN
Inventors: 丁志强; 袁丁; 吴红彦; 夏征
Original assignee: Beijing Htnova Detection Technology Co ltd
Current assignee: Beijing Htnova Detection Technology Co ltd
Priority date: 2020-11-27
Filing date: 2020-11-27
Publication date: 2023-07-25
Anticipated expiration: 2040-11-27
Also published as: CN112304666A

Abstract

The invention relates to a trace explosive detector, and belongs to the technical field of trace explosive detection. The trace explosive detector comprises a main shell, wherein a sensitive device is arranged in the main shell, an inlet end of the sensitive device penetrates through the top of the main shell to be connected with a sampler and communicated with a heating head on the main shell, and the main shell is detachably connected with the sampler. The beneficial effects are that: the sampler is combined on the main shell, the heating head on the main shell is matched for sucking air and sampling steam, and the detachable connection mode is convenient for operators to use, so that the installation and detachment efficiency is improved.

Description

Trace explosive detector

Technical Field

The invention belongs to the technical field of fluorescent trace explosive detection, and particularly relates to a trace explosive detector.

Background

The fluorescent trace explosive detector is a detection device integrating machinery, electronics, chemistry and optics, and the main working principle is as follows: after the trace explosive of the detection object is obtained through the sampling sheet, the trace explosive is inserted into a heating groove corresponding to the detector for heating, the trace explosive is evaporated, the air pump sucks the evaporated trace explosive into the sensitive device through the air inlet nozzle for quenching reaction, and therefore the trace explosive is detected by the optical sensor, and signals are transmitted to the circuit board for audible and visual alarm.

Because of the environment in which trace explosive detectors are used, not only are hand-held detection, bench-top detection, but also the market has a variety of use requirements, sometimes only as part of some system-integrated devices, which requires a universal, easy-to-install detector.

Therefore, a trace explosive detector is proposed to address the deficiencies of the prior art.

Disclosure of Invention

In order to solve the technical problems, the invention provides the trace explosive detector, the sampler is combined on the main shell, the heating head on the main shell is matched for sucking gas and sampling steam, the detachable connection mode is convenient for operators to use, and the installation and detachment efficiency is improved.

The technical scheme for solving the technical problems is as follows: the trace explosive detector comprises a main shell, a sensitive device is arranged in the main shell, an inlet end of the sensitive device penetrates through the top of the main shell to be connected with a sampler and communicated with a heating head on the main shell, and the main shell is detachably connected with the sampler.

The beneficial effects are that: the sampler is combined on the main shell, the heating head on the main shell is matched for sucking air and sampling steam, and the detachable connection mode is convenient for operators to use, so that the installation and detachment efficiency is improved.

Further, the sampler includes drain pan and top cap, the upper portion of drain pan is equipped with the opening, the opening part is equipped with and is used for the closing cap the open-ended the top cap, one side of drain pan is equipped with uncovered, uncovered department is fixed to be equipped with the connecting plate that is used for connecting the host computer, be equipped with the jack that is used for inserting the sampling piece on the top cap, the bottom is fixed to be equipped with heating head pair pipe PCB in the drain pan, heating head pair pipe PCB's top is equipped with the driving piece that is used for pressing from both sides tightly and heats the sampling piece, the both sides of drain pan are equipped with the connecting piece that is used for connecting the host computer, uncovered one side of drain pan be equipped with the heating head keysets with the heating head pair pipe PCB electricity is connected.

The beneficial effects of adopting the further scheme are as follows: the driving piece solves the problems that the trace explosive detector sampling piece needs back heating and clamping; the buckle connection mode is convenient for operators to use, and improves the installation and disassembly efficiency.

Further, the driving piece includes sharp drive portion, deflector, heat insulating board, heating plate and hot plate, the output transmission of sharp drive portion is connected the deflector, the both ends of deflector are overlapped respectively and are established on a guiding axle, the guiding axle is fixed on the drain pan, the deflector is kept away from fixedly establish on the one side of sharp drive portion on the one side of heat insulating board, fixedly be equipped with temperature sensor on the heat insulating board, the heat insulating board is fixed to the another side relatively and is equipped with the hot plate, the hot plate is embedded to be equipped with the heating plate, the upper portion of hot plate is equipped with the slot, the slot is established the vertical below of jack, be equipped with infrared emission tube light guide hole in the drain pan, infrared emission tube light guide hole's both ends are equipped with infrared emission tube and infrared receiving tube respectively, when the sampling plate inserts in the slot and blocks infrared emission tube light guide hole, the infrared emission tube triggers sharp drive portion promotes the deflector motion, the heating head is to the geminate transistor with sharp drive portion electricity is connected.

The beneficial effects of adopting the further scheme are as follows: when the sampling sheet is inserted into the heating plate slot, the sampling sheet blocks the light guide hole of the infrared emission tube, the infrared emission tube triggers the linear driving part to drive the guide plate to move, the guide plate is pushed, the heating plate on the guide plate can be matched with the heating head on the host machine to compress the sampling sheet, and meanwhile, the sampling sheet is heated, so that the detection efficiency and the sensitivity are improved.

Further, the linear driving part is an electromagnet with an iron core shaft, and the guide plate is sleeved on the iron core shaft.

The beneficial effects of adopting the further scheme are as follows: simple structure, the electro-magnet promotes the deflector motion, and the process is stable, convenient operation.

Further, the electromagnet is provided with a cooling fin pressing plate, and a plurality of cooling fins are fixedly arranged on the cooling fin pressing plate.

The beneficial effects of adopting the further scheme are as follows: and heat dissipation is performed timely, so that the equipment is prevented from being burnt out.

Further, the heating head is provided with a PCB cover on the pair of tube PCBs.

The beneficial effects of adopting the further scheme are as follows: the heating head is protected on the pipe PCB, and the service life is prolonged.

Further, the connecting piece includes first buckle lid and second buckle lid, first buckle lid with the second buckle lid sets up respectively two opposite outsides of drain pan, first buckle lid with the one end of second buckle lid is in through a spring coupling respectively on the drain pan, two opposite outsides of drain pan set up to the inclined plane, first buckle lid with the other end of second buckle lid all is equipped with the connection buckle, the drain pan with between the top cap and the uncovered department of drain pan all is equipped with waterproof adhesive tape.

The beneficial effects of adopting the further scheme are as follows: the assembly and the disassembly are convenient, and the fixing effect is good.

Further, a permanent magnet which is convenient for aligning with an iron bar on the host machine is arranged at the opening of the bottom shell.

The beneficial effects of adopting the further scheme are as follows: is convenient for aligning with a host, is convenient to install and saves time.

Further, a limiting part for limiting the position of the sampling sheet is arranged in the bottom shell, and the limiting part is arranged under the heating plate vertically.

The beneficial effects of adopting the further scheme are as follows: the problems that the testing position is inaccurate, the infrared pair tube sensor cannot be triggered and the like caused by bending deformation of the sampling sheet are solved.

Further, the limit part is a plurality of limit ribs arranged at intervals.

The beneficial effects of adopting the further scheme are as follows: the sampling piece can soften when heating, leads to the sampling piece crooked, continues to move down through spacing muscle restriction sampling piece, and leads to the detection position inaccuracy.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is a schematic diagram of the internal structure of the detector;

FIG. 3 is a front view of the sampler

FIG. 4 is a cross-sectional view A-A of FIG. 3;

FIG. 5 is a cross-sectional view B-B of FIG. 3;

FIG. 6 is a cross-sectional view of C-C of FIG. 3;

FIG. 7 is a side view of the sampler;

FIG. 8 is a D-D sectional view of FIG. 7;

FIG. 9 is a top view of the sampler;

FIG. 10 is a bottom view of the sampler;

in the drawings, the list of components represented by the various numbers is as follows:

1. a main housing; 2. a sensitive device; 3. a heating head; 4. a sampler; 41. a connecting buckle; 42. a spring; 43. a first snap cap; 44. a second snap cap; 45. a bottom case; 46. a guide shaft; 47. heating head to the tube PCB; 48. a permanent magnet; 49. a PCB cover; 410. an electromagnet; 411. a guide plate; 412. a heat insulating plate; 413. a heating sheet; 414. a temperature sensor; 415. a heating plate; 416. a heating head adapter plate; 417. a connecting plate; 418. a top cover; 419. a waterproof adhesive tape; 420. a heat sink; 421. and a heat sink pressing plate.

Detailed Description

The principles and features of the present invention are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.

Because the spectrometer module and the sensitive device of the trace explosive detector all need to be detected, because the sensitive device needs to be installed into the spectrometer module, if the sensitive device is respectively used as a detection tool, the tool is multiple in types, high in cost and low in detection efficiency, and needs some automatic structural detection, so that the detection precision and the working efficiency are improved.

Example 1

As shown in fig. 1-10, the present embodiment provides a trace explosive detector comprising: the inside of main casing 1 is equipped with sensing device 2, and sensing device 2's entry end passes the top of main casing 1 and is connected with sampler 4, and communicates with heating head 3 on the main casing 1, and main casing 1 and sampler 4 can dismantle the connection.

The sampler 4 is combined on the main shell 1, and is matched with the heating head 3 on the main shell 1 to suck and sample steam, so that the detachable connection mode is convenient for operators to use, and the installation and detachment efficiency is improved.

Example 2

Preferably, in this embodiment, the sampler 4 includes a bottom shell 45 and a top cover 418, an opening is provided at the upper part of the bottom shell 45, a top cover 418 for closing the opening is provided at the opening, an opening is provided at one side of the bottom shell 45, a connection plate 417 for connecting with a host is fixedly provided at the opening, a gap for passing a heating head on the host is provided on the connection plate 417, a jack for inserting a sampling piece is provided on the top cover 418, a driving piece for clamping and heating the sampling piece is fixedly provided at the bottom in the bottom shell 45, a connecting piece for connecting with the host is provided at two sides of the bottom shell 45 above the heating head pair pipe PCB47, a heating head adapter plate 416 is provided at one side of the opening of the bottom shell 45 for connecting with an interface of the host, the heating head adapter plate 416 is electrically connected with the heating head pair pipe PCB47, a gap for passing the heating head on the host is provided on the connection plate 417, the driving piece is matched with the heating head to clamp the sampling piece, the sampling piece is heated by the heating head, and the back of the driving piece with a heating function is also provided, the fixing effect is good, and the detection data is accurate; the sampler 4 is connected with the host computer through a connecting piece so as to be convenient for an operator to use, and the installation and disassembly efficiency is improved.

Preferably, in this embodiment, the driving piece includes a linear driving part, the guide plate 411, the heat insulation plate 412, the heating plate 413 and the heating plate 415, the linear driving part is the electromagnet 410 with the iron core shaft, the guide plate 411 is sleeved on the iron core shaft, two ends of the guide plate 411 are respectively sleeved on a guide shaft 46, the guide shaft 46 is fixed on the bottom shell 45 through screws, one side of the guide plate 411 away from the linear driving part is fixed on one side of the heat insulation plate 412 through screws, the heating plate 415 is fixed on the other side of the heat insulation plate 412 through screws, the heating plate 415 is embedded with the heating plate 413, the upper part of the heating plate 415 is provided with a slot, the slot is arranged under the jack, the bottom shell 45 is internally provided with an infrared emission tube light guide hole, two ends of the infrared emission tube light guide hole are respectively provided with an infrared emission tube and an infrared emission receiving tube, when the sampling plate is inserted into the slot to block the infrared emission tube light guide hole, the infrared emission tube triggers the linear driving part to push the guide plate 411 to move, the heating head is electrically connected with the linear driving part, the heating head is further connected with the heating plate PCB47, the heating plate receives the electric signal received by the infrared emission tube, the heating plate is further controlled to work, the iron core shaft pushes the guide plate 411, the heating plate is clamped by the heating plate 47, and is electrically connected with the heating head to the heating head.

Preferably, in this embodiment, the electromagnet 410 is provided with a heat sink pressing plate 421, and the heat sink pressing plate 421 is fixedly provided with a plurality of heat sinks 420, which are in contact with the electromagnet 410, so as to achieve the function of rapid heat dissipation, and improve the service life of the electromagnet 410.

Preferably, in this embodiment, the heating head is provided with a PCB cover 49 on the tube PCB47 to protect the heating head from the tube PCB47 and to improve the service life.

Example 3

Preferably, in this embodiment, the electromagnet 410 is provided with a heat sink pressing plate 421, and the heat sink pressing plate 421 is fixedly provided with a plurality of heat sinks 420, which are in contact with the electromagnet 41O, so as to achieve the function of rapid heat dissipation, and improve the service life of the electromagnet 410.

Preferably, in this embodiment, the connecting piece includes first buckle cover 43 and second buckle cover 44, first buckle cover 43 and second buckle cover 44 set up respectively in two opposite outsides of drain pan 45, first buckle cover 43 and second buckle cover 44's one end is connected on drain pan 45 through a spring 42 respectively, drain pan 45 opposite outsides set up to the inclined plane, first buckle cover 43 and second buckle cover 44's the other end all is equipped with connection buckle 41, all be equipped with waterproof adhesive tape 419 between drain pan 45 and top cap 418 and drain pan 45's open department, only need the people's hand to press first buckle cover 43 and second buckle cover 44 to be close to spring 42 one end during the use, it is convenient to assemble and dismantle in the recess of host computer corresponding position to clamp through connection buckle 41, fixed effectual.

Preferably, in this embodiment, the opening of the bottom shell 45 is provided with a permanent magnet 48 which is convenient for aligning with an iron bar on the host, and the corresponding position on the host is provided with the iron bar, so that the installation is convenient, the alignment is convenient, and the time is saved.

Example 4

Preferably, in this embodiment, a limiting part for limiting the position of the sampling sheet is disposed in the bottom shell 45, the limiting part is disposed under the heating plate vertically, a limiting part for limiting the position of the sampling sheet is disposed in the bottom shell 45, and the limiting part is disposed under the heating plate 415 vertically.

Example 5

The limiting part is a plurality of limiting ribs which are arranged at intervals, and because the sampling sheet needs to be heated in the process of air suction and sampling, and because the sampling sheet is a Teflon sheet, the sampling sheet becomes soft after being heated, and can be bent after being inserted into the bottom surface of the shell, namely the position of a real detected substance moves downwards, so that the detected substance cannot be sucked to the maximum extent; because the sampling sheet is a Teflon sheet, the problem of inconsistent light transmittance exists in the actual production and manufacturing process, and the position of the sampling sheet is sensed by the infrared pair tube sensor. Therefore, when in actual use, the sampling sheet is inserted into the position, and the probability of triggering the infrared pair tube sensor is very low; because the inside high temperature heating assembly that has of sample thief, again because the sample thief subassembly needs the careful dismouting of user, conventional plastics can lead to softening scheduling problem, and the outside high temperature of casing can appear in common metal, continues to move down through spacing muscle restriction sampling piece, makes the detection position accurate, and detection data is more accurate.

The heating head 3 of the present application is similar to the heating device of the patent application CN2019221786737, and therefore will not be described in detail.

When the invention is used, the sampling sheet collects the detected substances, the surface of the sampling sheet with the detected substances faces the heating head of the host, when the sampling sheet is inserted into the bottom of the slot to block the light guide hole of the infrared emission tube, the optical sensor sends out signals to the heating head pair tube PCB47, the electromagnet 410 is driven to push the heating plate 415 to cooperate with the heating head extending into the bottom shell 45 of the sampler to clamp the sampling sheet, the substances on the sampling sheet are heated and evaporated, and the sampling steam is sucked through the air suction port on the heating head 3 arranged on the main shell 1, thus completing the sampling process and improving the detection precision and the working efficiency.

In the description of the present invention, it should be understood that the terms "center", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "inner", "outer", "peripheral side", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the system or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

The foregoing is only illustrative of the present invention and is not to be construed as limiting thereof, but rather as various modifications, equivalent arrangements, improvements, etc., within the spirit and principles of the present invention.

Claims

1. A trace explosive detector comprising:

the device comprises a main shell (1), wherein a sensitive device (2) is arranged in the main shell (1), an inlet end of the sensitive device (2) penetrates through the top of the main shell (1) to be connected with a sampler (4) and is communicated with a heating head (3) on the main shell (1), and the main shell (1) is detachably connected with the sampler (4);

the sampler (4) comprises a bottom shell (45) and a top cover (418), an opening is formed in the upper portion of the bottom shell (45), the opening is provided with a top cover (418) for sealing the opening, one side of the bottom shell (45) is provided with an opening, a connecting plate (417) for connecting the main shell (1) is fixedly arranged at the opening, a jack for inserting a sampling sheet is formed in the top cover (418), a heating head pair pipe PC B (47) is fixedly arranged in the bottom shell (45), a driving piece for clamping and heating the sampling sheet is arranged above the heating head pair pipe PC B (47), connecting pieces for connecting the main shell (1) are arranged on two sides of the bottom shell (45), a heating head adapter plate (416) is arranged on one side of the opening of the bottom shell (45), and the heating head adapter plate (416) is electrically connected with the heating head pair pipe PCB (47);

the driving piece comprises a linear driving part, a guide plate (411), a heat insulation plate (412), a heating plate (413) and a heating plate (415), wherein the output end of the linear driving part is in transmission connection with the guide plate (411), two ends of the guide plate (411) are respectively sleeved on a guide shaft (46), the guide shafts (46) are fixed on a bottom shell (45), the guide plate (411) is far away from one side of the linear driving part and fixedly arranged on one side of the heat insulation plate (412), a temperature sensor (414) is fixedly arranged on the heat insulation plate (412), the heating plate (412) is fixedly arranged on the other side of the heat insulation plate opposite to the other side of the heat insulation plate, the heating plate (415) is internally provided with the heating plate (413), the upper part of the heating plate (415) is provided with a slot, the slot is arranged at the vertical lower part of the jack, two ends of the infrared emission tube light guide hole are respectively provided with an infrared emission tube and an infrared receiving tube, and the infrared receiving tube when the sampling plate is inserted into the slot and is blocked by the infrared emission tube light guide hole, the linear driving part is pushed by the infrared emission tube (47) to move, and the linear driving part is connected with the linear driving part (47).

2. The trace explosive detector according to claim 1, wherein the linear drive is an electromagnet (410) with a ferrous mandrel, and the guide plate (411) is sleeved on the ferrous mandrel.

3. Trace explosive detector according to claim 2, characterized in that the electromagnet is provided with a heat sink pressure plate (421), and the heat sink pressure plate (421) is fixedly provided with a plurality of heat sinks (420).

4. A trace explosive detector according to any one of claims 1 to 3, wherein the heating head is provided with a PCB cover (49) on the tube PCB (47).

5. A trace explosive detector according to any one of claims 1-3, wherein the connecting member comprises a first snap cap (43) and a second snap cap (44), the first snap cap (43) and the second snap cap (44) are respectively arranged on two opposite outer sides of the bottom shell (45), one ends of the first snap cap (43) and the second snap cap (44) are respectively connected to the bottom shell (45) through a spring (42), two opposite outer sides of the bottom shell (45) are provided with inclined surfaces, the other ends of the first snap cap (43) and the second snap cap (44) are respectively provided with a connecting buckle (41), and waterproof adhesive tapes (419) are respectively arranged between the bottom shell (45) and the top cap (418) and at the opening of the bottom shell (45).

6. A trace explosive detector according to any one of claims 1 to 3, wherein the bottom shell (45) is provided with a permanent magnet (48) at its opening to facilitate alignment with an iron bar on the host machine.

7. A trace explosive detector according to any one of claims 1-3, wherein a limit stop is provided in the bottom shell (45) to limit the position of the sample sheet, the limit stop being provided vertically below the heating plate (415).

8. The trace explosive detector according to claim 7, wherein the spacing portion is a plurality of spacing ribs disposed in spaced relation.