Fire scene combustion residue screening tool

Abstract

The invention discloses a fire scene combustion residue screening tool, and belongs to the technical field of comburent screening. Comprising a screening box, a penetrating type feeding opening is formed in the upper surface of the interior of the screening box, the front surface and the rear surface of the interior of the screening box are jointly and rotationally connected with a screening frame, and inclined guide plates are fixedly connected to the positions, located below the screening frame, of the left side and the right side of the interior of the screening box; a collecting box is arranged on the lower surface in the screening box; the right end of an output shaft of a double-shaft motor drives a first rotating disc to rotate, a screening frame swings in a reciprocating mode in a box through a first supporting rod, mechanical automatic screening is achieved, compared with manual operation, the residue screening efficiency is greatly improved, orderly collection of fine particles is guaranteed through the design of an oblique material guiding plate and a collecting box, and the screening efficiency is improved. And an observation window and an operation center on the front surface facilitate real-time monitoring of the screening progress and control of equipment operation, and operation convenience and accuracy are improved.

Description

Technical Field

[0001] The invention relates to the technical field of combustion material screening, in particular to a fire scene combustion residue screening tool. Background Art

[0002] Fire scene debris may contain key physical evidence such as electrical debris, metal fragments, and chemical residues. The morphology, composition, and distribution of these physical evidence are crucial for determining the cause of the fire (e.g., electrical failure, arson, spontaneous combustion, etc.). For example, molten beads from electrical short circuits and metal particles from explosives must be precisely separated using screening tools to avoid biased investigative conclusions due to impurities.

[0003] Due to the complex environment at the fire scene, traditional laboratory screening equipment is large in size and has poor portability, and cannot meet the needs of rapid on-site investigation. Therefore, it is necessary to develop lightweight, modular screening tools to achieve real-time on-site screening and shorten the investigation cycle. Summary of the Invention

[0004] Purpose of the invention: The purpose of the present invention is to provide a solution to the problem that traditional laboratory screening equipment is large in size, poor in portability, and cannot meet the needs of rapid on-site exploration.

[0005] Technical solution: A fire scene combustion residue screening tool, comprising a screening box, wherein the inner upper surface of the screening box is provided with a through-type feeding port, the inner front surface and the inner rear surface of the screening box are rotatably connected to a screening frame, the inner left side and the inner right side of the screening box and located below the screening frame are fixedly connected with an oblique material guide plate, and the inner lower surface of the screening box is provided with a collection box;

[0006] A push rod is fixedly connected to the right side of the screening box, and a plurality of universal wheels are provided on the lower surface of the screening box.

[0007] Furthermore, a side support plate is fixedly connected to the left side of the upper surface of the screening box, a dual-axis motor is fixedly connected to the left side of the side support plate, a rotating disc is provided on the right side of the side support plate, the right end of the output shaft of the dual-axis motor is fixedly connected to the left center of the rotating disc, a through-type give way groove is provided on the inner upper surface of the screening box and located on the left side of the feeding port, a support rod is rotatably connected to the right side of the outer wall of the rotating disc, the bottom end of the support rod passes through the give way groove, and the lower right side of the support rod is rotatably connected to the left side of the screening frame.

[0008] Furthermore, an observation window is integrally formed above the front surface of the screening box, and an operation center is provided on the front surface of the screening box and on the left side of the observation window.

[0009] Furthermore, a pumping plate is provided in front of the collecting box, and the front surface of the pumping plate extends to the front of the screening box.

[0010] Furthermore, a control box 1 is fixedly connected to the inner lower surface of the screening box and located on the left side of the collecting box, a movable plate 1 is slidably connected to the interior of the control box 1, a movable rod 1 is fixedly connected to the right side of the movable plate 1, the right end of the movable rod 1 extends to the right side of the control box 1, and is fixedly connected to a push plate 1, the right side of the push plate 1 is in contact with the left side of the collecting box, a sliding groove is provided on the rear surface of the pulling plate, the inner left and inner right sides of the sliding groove are jointly fixedly connected to a guide rod, the outer side wall of the guide rod is slidably connected to a connecting block, and the rear surface of the connecting block is fixedly connected to the front surface of the collecting box.

[0011] Furthermore, the left side of the screening box is fixedly connected to an extrusion box, and the inner upper surface of the extrusion box is provided with a through-type give way groove 2, the interior of the extrusion box is slidably connected to a piston plate, the upper surface of the piston plate is movably connected to a support rod 2, the top of the support rod 2 passes through the give way groove 2, the left end of the output shaft of the dual-axis motor is fixedly connected to a rotating disc 2, the left side of the rotating disc 2 is rotatably connected to the upper right side of the support rod 2, and the inner lower surface of the extrusion box is communicated with the inner left side of the control box 1.

[0012] Furthermore, a control box 2 is fixedly connected to the inner lower surface of the screening box and located on the right side of the collecting box, a movable plate 2 is slidably connected to the interior of the control box 2, a movable rod 2 is fixedly connected to the left side of the movable plate 2, the left side of the movable rod 2 extends to the left side of the control box 2 and is fixedly connected to a push plate 2, the left side of the push plate 2 contacts the right side of the collecting box, and the right side of the movable plate 2 is fixedly connected to the inner right side of the control box 2 with multiple reset springs.

[0013] Beneficial effects: The right end of the dual-axis motor output shaft drives the rotating disc to rotate, and the support rod makes the screening frame swing back and forth in the box, thus realizing mechanical automatic screening. Compared with manual operation, the efficiency of residue screening is greatly improved. The design of the inclined guide plate and the collection box ensures that fine particles are collected in an orderly manner. The observation window and operation center on the front surface facilitate real-time monitoring of the screening progress and control of the equipment operation, improving the convenience and accuracy of operation.

[0014] The left end of the output shaft of the dual-axis motor drives the rotating disc 2 to rotate, and the piston plate is reciprocated in the extrusion box through the support rod 2. In conjunction with the control box 1, the control box 2 and related components, the reciprocating movement of the collection box is realized, effectively preventing the accumulation of residues and ensuring the collection efficiency. The reset spring on the right side of the collection box can automatically reset it to ensure the continuity and stability of the device operation.

[0015] The present invention provides a plurality of universal wheels on the lower surface of the screening box and matches it with a push rod on the right side, so that the device has flexible mobility, solves the problems of large size and poor portability of traditional laboratory screening equipment, and can meet the needs of rapid investigation at the fire scene. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 It is a schematic diagram of the overall front cross-sectional structure of the present invention;

[0018] Figure 3 It is a schematic side cross-sectional view of the extrusion box of the present invention;

[0019] Figure 4 This is a schematic diagram of the front cross-section structure of the control box 1 of the present invention;

[0020] Figure 5 This is a schematic diagram of the front cross-section structure of the control box 2 of the present invention;

[0021] Figure 6 It is a rear structural schematic diagram of the twitching plate of the present invention.

[0022] In the figure: 1. Screening box; 2. Feeding port; 3. Screening frame; 4. Oblique guide plate; 5. Collecting box; 6. Push rod; 7. Universal wheel; 8. Side support plate; 9. Dual-axis motor; 10. Rotating disc 1; 11. Yield slot 1; 12. Support rod 1; 13. Observation window; 14. Operation center; 15. Twitching plate; 16. Control box 1; 17. Movable plate 1; 18. Movable rod 1; 19. Push plate 1; 20. Slide; 21. Guide rod; 22. Connecting block; 23. Extrusion box; 24. Yield slot 2; 25. Piston plate; 26. Support rod 2; 27. Rotating disc 2; 28. Control box 2; 29. Movable plate 2; 30. Movable rod 2; 31. Push plate 2; 32. Return spring. DETAILED DESCRIPTION

[0023] In order to make the technical solution of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] Example

[0025] like Figure 1 and Figure 2As shown, a fire scene combustion residue screening tool is provided, including a screening box 1, the inner upper surface of the screening box 1 is provided with a through-type feeding port 2, the inner front surface and the inner rear surface of the screening box 1 are connected to the screening frame 3 by rotation, the inner left side and the inner right side of the screening box 1 and located below the screening frame 3 are fixedly connected with an oblique material guide plate 4, the inner lower surface of the screening box 1 is provided with a collecting box 5; the right side of the screening box 1 is fixedly connected with a push rod 6, and the lower surface of the screening box 1 is provided with a plurality of universal wheels 7; the left side of the upper surface of the screening box 1 A side support plate 8 is fixedly connected, a dual-axis motor 9 is fixedly connected to the left side of the side support plate 8, a rotating disc 10 is provided on the right side of the side support plate 8, the right end of the output shaft of the dual-axis motor 9 is fixedly connected to the left center of the rotating disc 10, a through-type make way groove 11 is provided on the inner upper surface of the screening box 1 and is located on the left side of the feeding port 2, a support rod 12 is rotatably connected to the right side of the outer wall of the rotating disc 10, the bottom end of the support rod 12 passes through the make way groove 11, and the lower right side of the support rod 12 is rotatably connected to the left side of the screening frame 3;

[0026] After the sieve 1 is slid open, the sieve 1 is moved back and forth, and the sieve 1 is moved to the sieve box 1. The sieve box 1 is moved to the sieve box 1 by the swiveling gear 7. The sieve box 1 is moved to the sieve box 1 by the swiveling gear 7.

[0027] like Figure 1 As shown, an observation window 13 is integrally formed above the front surface of the screening box 1, and an operation center 14 is provided on the front surface of the screening box 1 and on the left side of the observation window 13;

[0028] When the device is working, the screening progress and status can be observed in real time through the observation window 13, so that the device can not only conveniently control the equipment operation through the operation center 14, but also intuitively monitor the screening process with the help of the observation window 13. It can adapt to different fire locations with the characteristics of flexible movement, achieve efficient screening through mechanical transmission, and further reduce the intensity of manual operation.

[0029] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4and Figure 6 As shown, a twitching plate 15 is provided in front of the collecting box 5, and the front surface of the twitching plate 15 extends to the front of the screening box 1, and a control box 16 is fixedly connected to the inner lower surface of the screening box 1 and located on the left side of the collecting box 5. A movable plate 17 is slidably connected to the inside of the control box 16, and a movable rod 18 is fixedly connected to the right side of the movable plate 17. The right end of the movable rod 18 extends to the right side of the control box 16 and is fixedly connected to a push plate 19. The right side of the push plate 19 contacts the left side of the collecting box 5, and a slide groove 20 is provided on the rear surface of the twitching plate 15. The inner left and inner right sides of the slide groove 20 are fixedly connected to a guide rod 21. The outer side wall of the guide rod 21 is slidably connected to a connecting block 22. The rear surface of the connecting block 22 is fixedly connected to the front surface of the collecting box 5;

[0030] The left side of the screening box 1 is fixedly connected to an extrusion box 23, and a through-type make way groove 24 is provided on the inner upper surface of the extrusion box 23. A piston plate 25 is slidably connected to the inside of the extrusion box 23, and a support rod 26 is movably connected to the upper surface of the piston plate 25. The top of the support rod 26 passes through the make way groove 24. The left end of the output shaft of the dual-axis motor 9 is fixedly connected to a rotating disc 27. The left side of the rotating disc 27 is rotatably connected to the upper right side of the support rod 26. The inner lower surface of the extrusion box 23 is connected to the inner left side of the control box 16;

[0031] When the fine particles collected in the collecting box 5 gradually increase, the left end of the output shaft of the dual-axis motor 9 drives the rotating disc 27 to rotate. The rotating disc 27 rotates through the support rod 26 connected to the left side, so that the top of the support rod 26 passes through the give way groove 24 and drives the piston plate 25 to move up and down in the extrusion box 23. When the piston plate 25 moves downward, the gas in the extrusion box 23 enters the control box 16 through the connection between the lower surface of the interior and the left side of the control box 16, pushing the movable plate 17 to slide to the right. The movable plate 17 drives the push plate 1 through the movable rod 18. 9 moves to the right, and the pushing plate 19 squeezes the left side of the collecting box 5 to move it to the right. The connecting block 22 on the front surface of the collecting box 5 slides on the guide rod 21 in the slide groove 20 on the rear surface of the twitching plate 15 to ensure smooth movement. When the collecting box 5 moves to the right, the internal particles are prevented from piling up by the thrust. At the same time, the dual-axis motor 9 keeps running to make the pushing plate 19 push the collecting box 5 back and forth, so as to achieve uniform distribution of particles, thereby preventing the accumulation of residues in the collecting box 5, ensuring collection efficiency, and avoiding the impact of accumulation on the screening process. No manual intervention is required, thereby improving the degree of automation and practicality of the device.

[0032] like Figure 2 and Figure 5As shown, a control box 28 is fixedly connected to the inner lower surface of the screening box 1 and located on the right side of the collecting box 5. A movable plate 29 is slidably connected to the interior of the control box 28. A movable rod 230 is fixedly connected to the left side of the movable plate 29. The left side of the movable rod 30 extends to the left side of the control box 28 and is fixedly connected to a push plate 231. The left side of the push plate 31 contacts the right side of the collecting box 5. The right side of the movable plate 29 and the right side of the interior of the control box 28 are fixedly connected with a plurality of return springs 32.

[0033] When the piston plate 25 slides upward, negative pressure is formed in the extrusion box 23, and the gas in the control box 1 16 flows back. The movable plate 17 no longer pushes the collecting box 5 after the gas pressure disappears. At this time, the multiple return springs 32 connected to the right side of the movable plate 29 in the control box 28 are in a compressed state because the push plate 21 was squeezed when the collecting box 5 moved to the right. When the piston plate 25 slides upward, the air pressure in the extrusion box 23 changes, and the return spring 32 releases its elastic potential energy, pushing the movable plate 29 to slide left. The movable plate 29 drives the push plate 231 to move left through the movable rod 23, pushing the plate 231 to squeeze the right side of the collecting box 5, causing the collecting box 5 to return to slide to the left on the guide rod 21, and then the collecting box 5 completes the left and right reciprocating movement within a cycle of the up and down movement of the piston plate 25, which can prevent the accumulation of particles and ensure that the collecting box 5 returns to its initial position through the automatic return function of the return spring 32, thereby ensuring the accuracy of the next pushing action, improving the consistency and stability of the operation of the device, and further avoiding the influence of the residue collection efficiency due to the position offset of the collecting box 5.

[0034] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A fire scene combustion residue screening tool, comprising a screening box (1), characterized in that: The inner upper surface of the screening box (1) is provided with a through-type feeding port (2); the inner front surface and the inner rear surface of the screening box (1) are rotatably connected to a screening frame (3); the inner left side and the inner right side of the screening box (1) and located below the screening frame (3) are fixedly connected with an oblique material guide plate (4); the inner lower surface of the screening box (1) is provided with a collecting box (5); A push rod (6) is fixedly connected to the right side of the screening box (1), and a plurality of universal wheels (7) are provided on the lower surface of the screening box (1).

2. The fire scene combustion residue screening tool according to claim 1, characterized in that: A side support plate (8) is fixedly connected to the left side of the upper surface of the screening box (1), a double-axis motor (9) is fixedly connected to the left side of the side support plate (8), a rotating disc (10) is provided on the right side of the side support plate (8), the right end of the output shaft of the double-axis motor (9) is fixedly connected to the left center of the rotating disc (10), a through-type clearance groove (11) is provided on the inner upper surface of the screening box (1) and located on the left side of the feeding port (2), a support rod (12) is rotatably connected to the right side of the outer wall of the rotating disc (10), the bottom end of the support rod (12) passes through the clearance groove (11), and the lower right side of the support rod (12) is rotatably connected to the left side of the screening frame (3).

3. The fire scene combustion residue screening tool according to claim 1, characterized in that: An observation window (13) is integrally formed above the front surface of the screening box (1), and an operation center (14) is provided on the front surface of the screening box (1) and on the left side of the observation window (13).

4. The fire scene combustion residue screening tool according to claim 2, characterized in that: A pumping plate (15) is provided in front of the collecting box (5), and the front surface of the pumping plate (15) extends to the front of the screening box (1).

5. The fire scene combustion residue screening tool according to claim 4, characterized in that: The inner lower surface of the screening box (1) is fixedly connected to a control box (16) on the left side of the collecting box (5), and the inner side of the control box (16) is slidably connected to a movable plate (17). The right side of the movable plate (17) is fixedly connected to a movable rod (18). The right end of the movable rod (18) extends to the right side of the control box (16) and is fixedly connected to a push plate (19). The right side of the push plate (19) contacts the left side of the collecting box (5). A sliding groove (20) is provided on the rear surface of the pulling plate (15). The inner left and inner right sides of the sliding groove (20) are fixedly connected to a guide rod (21). The outer side wall of the guide rod (21) is slidably connected to a connecting block (22). The rear surface of the connecting block (22) is fixedly connected to the front surface of the collecting box (5).

6. The fire scene combustion residue screening tool according to claim 5, characterized in that: The left side of the screening box (1) is fixedly connected to an extrusion box (23), and the inner upper surface of the extrusion box (23) is provided with a through-type clearance groove 2 (24). The interior of the extrusion box (23) is slidably connected to a piston plate (25), and the upper surface of the piston plate (25) is movably connected to a support rod 2 (26), and the top of the support rod 2 (26) passes through the clearance groove 2 (24). The left end of the output shaft of the dual-axis motor (9) is fixedly connected to a rotating disc 2 (27), and the left side of the rotating disc 2 (27) is rotatably connected to the upper right side of the support rod 2 (26). The inner lower surface of the extrusion box (23) is connected to the inner left side of the control box 1 (16).

7. The fire residue screening tool according to claim 1, characterized in that: The inner lower surface of the screening box (1) is fixedly connected to a control box 2 (28) on the right side of the collecting box (5), and the inner sliding connection of the control box 2 (28) is a movable plate 2 (29), and the left side of the movable plate 2 (29) is fixedly connected to a movable rod 2 (30), and the left side of the movable rod 2 (30) extends to the left side of the control box 2 (28) and is fixedly connected to a push plate 2 (31), and the left side of the push plate 2 (31) contacts the right side of the collecting box (5), and the right side of the movable plate 2 (29) is fixedly connected to the inner right side of the control box 2 (28) with a plurality of reset springs (32).

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