Heat insulation structure for non-inductive trace explosive detection equipment

Abstract

The utility model relates to the field of explosive detection, and discloses a heat insulation structure for non-inductive trace explosive detection equipment, an external heating module comprises a shell, a heating assembly, a PCB (Printed Circuit Board) and a bracket assembly arranged in the shell, and the bracket assembly comprises a lower bracket, an upper bracket and a mounting seat arranged at the lower end of the upper bracket; the lower end of the mounting seat is fixedly mounted with the lower support, a cavity is formed in the mounting seat, the mounting seat is made of polytetrafluoroethylene, a containing groove is formed in the edge of the lower end face of the mounting seat, the shape of the containing groove is matched with that of the heating assembly, and the lower side of the containing groove and the lower support form an insertion groove for insertion of test paper. And the upper bracket is detachably connected with the mounting seat. The detection device has the advantages of low energy consumption, good thermal insulation performance, wide adaptive range and the like.

Description

Technical Field

[0001] The utility model relates to the field of explosive detection, in particular to a heat insulation structure for non-sensing trace explosive detection equipment. Background Art

[0002] Chinese Patent No. 202220584113.0 - Portable Trace Explosives Rapid Detection Device, provides a portable device for detecting explosives with a compact overall structure, lightweight size, and portability. It utilizes an installation method that combines an external heating module with a main unit, which is innovative in structural design. Furthermore, since the heating temperature of the external heating module can reach over 160 degrees, the detachable design of the external heating module and the main unit can accelerate heat dissipation. Furthermore, the separate design makes the overall shape more beautiful and reduces the sense of heaviness.

[0003] However, this device has the following problems. First, although the heating module can theoretically reach more than 160 degrees, due to poor thermal insulation, the actual temperature reaching the test paper varies greatly. Second, the high heating temperature of the heating module requires timely heat dissipation, resulting in a high shell temperature, which is prone to burns. Utility Model Content

[0004] The utility model aims at the shortcomings of the prior art and provides a heat insulation structure for non-sensing trace explosive detection equipment.

[0005] In order to solve the above technical problems, the present invention is solved by the following technical solutions:

[0006] An insulation structure for non-sensitive trace explosive detection equipment includes a detection host and an external heating module detachably connected to the host; the external heating module includes a shell, a heating component, a PCB board, and a bracket assembly installed in the shell, the bracket assembly includes a lower bracket, an upper bracket, and a mounting base installed at the lower end of the upper bracket, the lower end of the mounting base is fixed to the lower bracket, a cavity is provided inside the mounting base, the mounting base is made of polytetrafluoroethylene, a holding groove is provided on the edge of the lower end surface of the mounting base, the shape of the holding groove is adapted to the shape of the heating component, the lower side of the holding groove and the lower bracket form a slot for inserting the test paper, and the upper bracket and the mounting base are detachably connected.

[0007] Preferably, the cavity in the mounting seat is a vacuum structure.

[0008] Preferably, the mounting seat material has a melting point higher than 170° C. and a thermal conductivity coefficient lower than 0.3 w / m*k.

[0009] Preferably, the PCB board is mounted on the upper part of the shell through an upper bracket; the upper bracket includes at least four fixing columns, the upper ends of each fixing column are connected in pairs to form a mounting surface, and the edges of the upper ends of the fixing columns are formed with fixing ears. The PCB board is supported on the mounting surface and fixedly connected to the shell by screws passing through the fixing ears.

[0010] Preferably, there are four fixing columns and they are located at the four corners of the rectangle. A plug-in column is provided at the lower end of the fixing column. The plug-in column is cylindrical. A plurality of convex rings are provided on the outer ring surface of the plug-in column along the axial direction. The upper end surface of the mounting seat is provided with a plug-in hole adapted to the shape of the plug-in column and the convex ring. The plug-in column and the convex ring are plugged into the plug-in hole.

[0011] Preferably, a deformable slot is provided on the edge of the socket, and the deformable slot extends along the axis direction of the socket.

[0012] Preferably, a wire hole for extending the wires of the heating module is provided on the bottom surface of the containing tank.

[0013] Preferably, a hard polyurethane insulation board is pasted on the inner wall of the shell.

[0014] Preferably, a liquid injection port is provided on the side wall of the mounting seat, the liquid injection port is communicated with the cavity, and the cavity is filled with liquid.

[0015] Compared with the existing technology, this solution has the following advantages: the bracket and mounting base are redesigned, the thermal insulation capacity of the heating component is improved through structural design, heat loss is reduced, the heating temperature can be controlled at the heating end, the maximum heating temperature is lowered, energy consumption is reduced, and the temperature of the shell is lowered. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the overall structure of the device.

[0017] Figure 2 Schematic diagram of the structure with the shell removed.

[0018] Figure 3 It is a structural diagram of the bracket assembly.

[0019] Figure 4 It is a schematic diagram of the combination of the upper bracket and the mounting base.

[0020] Figure 5 yes Figure 4 main view.

[0021] Figure 6 yes Figure 5 sectional view of .

[0022] Figure 7 yes Figure 6 A partial enlarged view of .

[0023] Figure 8 It is a schematic diagram of the matching of the plug-in column and the plug-in hole.

[0024] The technical names of the figures in the figure are: 1-detection host, 2-external heating module, 3-shell, 5-bracket assembly, 6-lower bracket, 7-upper bracket, 8-mounting seat, 9-cavity, 10-holding groove, 11-slot, 12-fixing column, 13-fixing ear, 14-plug-in column, 15-convex ring, 16-plug-in hole, 17-groove, 18-deformation seam, 19-wire hole, 20-liquid injection port, 21-PCB board. DETAILED DESCRIPTION

[0025] The present invention is described in further detail below with reference to the accompanying drawings and embodiments.

[0026] Example 1

[0027] An insulation structure for a non-sensing trace explosive detection device includes a detection host 1 and an external heating module 2 detachably connected to the host; the external heating module 2 includes a shell 3, a heating component, a PCB board 21 and a bracket assembly 5 installed in the shell 3, the bracket assembly 5 includes a lower bracket 6, an upper bracket 7 and a mounting base 8 installed at the lower end of the upper bracket 7, the lower end of the mounting base 8 is fixed to the lower bracket 6, a cavity 9 is provided inside the mounting base 8, the material of the mounting base 8 is polytetrafluoroethylene, and a holding groove 10 is provided on the edge of the lower end surface of the mounting base 8, the shape of the holding groove 10 is adapted to the shape of the heating component, the lower side of the holding groove 10 and the lower bracket 6 form a slot 11 for inserting a test paper, and the upper bracket 7 and the mounting base 8 are detachably connected. The reason why the mounting seat 8 and the upper bracket 7 are designed separately in this solution is that, since the mounting seat 8 needs to be provided with a cavity 9 and the containing groove 10 needs to be redesigned, the integrated structure of the upper bracket 7 will greatly increase the mold cost and the yield rate. The advantage of the separate design of this solution is that the user can choose different mounting seats 8 according to different heating and insulation requirements. Moreover, since the mounting seat 8 works under high temperature conditions for a long time and performs insulation tasks, its aging speed is faster than that of traditional practical ones. The split design facilitates later maintenance and replacement, saving costs.

[0028] In this embodiment, the cavity 9 within the mounting base 8 is a vacuum structure. A vacuum has a non-conductive property, thereby isolating the heat transfer from the main surface of the heating component and the mounting slot or significantly reducing the heat transfer to the outside. The entire heat transfer outlet is basically concentrated in the direction of the test paper below the heating component, concentrating the heat and reducing heat loss.

[0029] The material of the mounting seat 8 of this solution is polytetrafluoroethylene, which has excellent physical properties and thermal insulation properties, is resistant to high temperatures and aging, and is self-lubricating and can make the surface of the mounting groove very smooth, thereby increasing the contact area of the heating component.

[0030] The upper portion of the upper bracket 7 is similar to that of the prior art. The PCB is mounted on the upper portion of the housing 3 via the upper bracket 7. The upper bracket 7 includes at least four fixing posts 12, each of which is connected to form a mounting surface. Fixing ears 13 are formed on the edges of the upper ends of the fixing posts 12. The PCB 21 is supported on the mounting surface and is fixed to the housing 3 via screws passing through the fixing ears 13. There are four fixing posts 12 located at the four corners of the rectangle.

[0031] Because the upper bracket 7 and the mounting base 8 are designed as a separate body, a plug-in column 14 is provided at the lower end of the fixing column 12 to facilitate installation. The plug-in column 14 is cylindrical, and the outer ring surface of the plug-in column 14 is axially provided with multiple protruding rings 15. The upper end surface of the mounting base 8 is provided with a plug-in hole 16 that matches the shape of the plug-in column 14 and the protruding ring 15. The plug-in column 14 and the protruding ring 15 are plugged into the plug-in hole 16. Because direct plugging is easy to fall off, and the protruding ring 15 is difficult to insert, this solution provides a deformable slot 18 on the edge of the plug-in hole. The deformable slot 18 extends along the axis of the plug-in hole. In this way, when plugging in or out, the deformable slot 18 only needs to increase the force to expand the plug-in hole 16, so that the protruding ring 15 can be withdrawn from or inserted into the annular groove 17 in the plug-in hole 16. The outer edge of the protruding ring 15 and the entrance of the groove 17 are both chamfered or rounded.

[0032] The bottom surface of the holding tank 10 is provided with a wire hole 19 for the heating module wire to extend out.

[0033] In order to reduce the temperature increase of the shell 3, a hard polyurethane insulation board is pasted on the inner wall of the shell 3.

[0034] Example 2

[0035] This embodiment differs from Embodiment 1 in that a liquid injection port 20 is provided on the sidewall of the mounting base 8, communicating with the cavity 9. The cavity 9 is filled with a liquid, preferably silicone oil, which absorbs and stores heat, thereby extending the service life of the mounting base 8. Furthermore, during continuous operation, the liquid in the cavity 9 maintains a certain initial temperature within the mounting groove, thereby accelerating the temperature increase of the heating component. Furthermore, silicone oil has a high boiling point, so even if the heating component is heated to 165 degrees Celsius, the heat transferred to the mounting base will not cause boiling, thus meeting the requirements of high-temperature heating work environments.

Claims

1. A heat-insulating structure for a non-sensing trace explosive detection device, comprising a detection host (1) and an external heating module (2) detachably connected to the host; characterized in that: The external heating module (2) comprises a housing (3), a heating component, a PCB board (21) and a bracket assembly (5) installed in the housing (3); the bracket assembly (5) comprises a lower bracket (6), an upper bracket (7) and a mounting base (8) installed at the lower end of the upper bracket (7); the lower end of the mounting base (8) is fixedly mounted on the lower bracket (6); a cavity (9) is provided inside the mounting base (8); the mounting base (8) is made of polytetrafluoroethylene; a receiving groove (10) is provided on the edge of the lower end surface of the mounting base (8); the shape of the receiving groove (10) is adapted to the shape of the heating component; the lower side of the receiving groove (10) and the lower bracket (6) form a slot (11) for inserting a test paper; the upper bracket (7) and the mounting base (8) are detachably connected.

2. The heat-insulating structure for non-sensing trace explosive detection equipment according to claim 1, characterized in that: The cavity (9) in the mounting seat (8) is a vacuum structure.

3. The heat-insulating structure for a non-sensing trace explosive detection device according to claim 1, characterized in that: The PCB board is mounted on the upper part of the housing (3) via an upper bracket (7); the upper bracket (7) comprises at least four fixing columns (12), the upper ends of the fixing columns (12) are connected in pairs to form a mounting surface, and the edges of the upper ends of the fixing columns (12) are formed with fixing ears (13); the PCB board (21) is supported on the mounting surface and fixedly connected to the housing (3) via screws passing through the fixing ears (13).

4. The heat-insulating structure for non-sensing trace explosive detection equipment according to claim 3, characterized in that: The number of the fixing columns (12) is four and they are located at the four corners of the rectangle. The lower end of the fixing column (12) is provided with a plug-in column (14), the plug-in column (14) is cylindrical, and the outer ring surface of the plug-in column (14) is provided with a plurality of convex rings (15) along the axial direction. The upper end surface of the mounting seat (8) is provided with a plug-in hole (16) that is adapted to the shape of the plug-in column (14) and the convex ring (15), and the plug-in column (14) and the convex ring (15) are plugged into the plug-in hole (16).

5. The heat-insulating structure for non-sensing trace explosive detection equipment according to claim 3, characterized in that: A deformable slot (18) is provided at the edge of the jack, and the deformable slot (18) extends along the axial direction of the jack.

6. The heat-insulating structure for non-sensing trace explosive detection equipment according to claim 1, characterized in that: The bottom surface of the containing tank (10) is provided with a wire hole (19) for the heating module wire to extend out.

7. The heat-insulating structure for non-sensing trace explosive detection equipment according to claim 1, characterized in that: A hard polyurethane insulation board is pasted on the inner wall of the shell (3).

8. The heat-insulating structure for non-sensing trace explosive detection equipment according to claim 1, characterized in that: A liquid injection port (20) is provided on the side wall of the mounting seat (8), the liquid injection port (20) is communicated with the cavity (9), and the cavity (9) is filled with liquid.

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