A device for rapid detection of heavy metals in furniture paint film

Abstract

The application relates to the technical field of furniture quality detection, in particular to a rapid heavy metal detection device for furniture paint film, which comprises a shell; two treatment boxes are arranged at the upper end of the shell, a negative pressure machine is arranged between the two treatment boxes, the negative pressure machine is communicated with the two treatment boxes, two air inlet pipes are arranged on the negative pressure machine, a cover plate is arranged on the upper cover of the treatment box, a feeding pipe and a stirrer are arranged on the cover plate, and the stirrer is matched with the treatment box; a transverse plate is arranged in the shell, a scraping mechanism is arranged at the lower end of the transverse plate, a strip-shaped hole matched with the scraping mechanism is arranged on the shell, shafts are arranged at the two ends of the transverse plate, rollers are arranged outside the shafts, and the rollers on the two sides are driven through connecting belts. Compared with the prior art, the application can detect different heavy metals without external interference when detecting and sampling the furniture, is relatively convenient, and the detection result is accurate.

Description

Technical Field

[0001] This invention relates to the field of furniture quality testing, specifically to a rapid detection device for heavy metals in furniture paint films. Background Technology

[0002] Heavy metals in furniture are often found in the coatings on the surface of furniture, such as paint, wax, and dyes. With long-term contact, heavy metals can migrate through skin contact or be ingested and enter the human body. Long-term accumulation can lead to liver and kidney damage, nervous system diseases, and even cancer. In particular, for families with children, excessive heavy metal migration can directly harm children's development. To avoid excessive heavy metal content in furniture coatings, it is necessary to test the content of different heavy metals in furniture coatings.

[0003] When conducting heavy metal testing on furniture production, in order to achieve comprehensive quality control, it is necessary to perform destructive testing on sampled furniture in the laboratory. This involves sampling from the paint layer on the furniture surface to detect the content of different heavy metals. However, the existing sampling method involves directly sampling the paint layer on the furniture surface. This process can lead to external impurities adhering to the paint layer, which can affect the final test results and result in inaccurate information.

[0004] Therefore, based on the above problems, we have invented a rapid detection device for heavy metals in furniture paint films. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a rapid detection device for heavy metals in furniture paint films, thereby solving the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a rapid detection device for heavy metals in furniture paint films, comprising a housing;

[0007] Two processing boxes are installed at the upper end of the outer shell, and a negative pressure machine is installed between the two processing boxes. The negative pressure machine is connected to both processing boxes and has two air inlet pipes. The processing boxes are covered with a cover plate, and a feeding pipe and a stirrer are installed on the cover plate. The stirrer is matched with the processing box.

[0008] A horizontal plate is installed inside the outer casing. A scraping mechanism is installed at the lower end of the horizontal plate. The outer casing has a strip-shaped hole that matches the scraping mechanism. A rotating shaft is installed at both ends of the horizontal plate. A roller is installed outside the rotating shaft. The rollers on both sides are connected by a connecting belt. The connecting belt is fixed to the scraping mechanism. A drive mechanism for driving the rotating shaft is provided inside the outer casing. A fine-tuning groove is provided at the lower end of the horizontal plate. A fine-tuning plate is slidably installed in the fine-tuning groove. A fine-tuning mechanism for fine-tuning the fine-tuning plate is provided in the fine-tuning groove.

[0009] An electric telescopic rod is installed at the lower end of the outer casing, and a fixing clamp is installed at the lower end of the electric telescopic rod.

[0010] Furthermore, the drive mechanism includes two drive shafts rotatably mounted to the inner wall of the housing. A drive motor is installed inside the housing. The drive shaft of the drive motor is coaxially mounted with one of the drive shafts. Both drive shafts are coaxially mounted with drive gears, which mesh with each other. Both drive shafts are coaxially mounted with residual gears. A driven gear is coaxially mounted on the rotating shaft, and the driven gear matches both residual gears.

[0011] Furthermore, the tooth distribution angle of both residual gears is 180°, and the teeth of the two residual gears face opposite directions.

[0012] Furthermore, the fine-tuning mechanism includes a bidirectional screw rotatably connected to the inner wall of the fine-tuning groove, a fine-tuning motor is installed in the fine-tuning groove, the drive shaft of the fine-tuning motor is coaxially installed with the bidirectional screw, two threaded blocks are threaded on the external thread of the bidirectional screw, both threaded blocks are slidably connected to the inner wall of the fine-tuning groove, and a deflection plate is rotatably installed at the lower end of each of the two threaded blocks, the lower end of the deflection plate is rotatably connected to the upper end of the fine-tuning plate.

[0013] Furthermore, the scraping mechanism includes two outer scrapers and one inner scraper. The inner scraper is located between and slidably connected to the two outer scrapers. The two outer scrapers are fixed together by an outer plate. A slot is provided at the upper end of both the outer and inner scrapers, matching a fine-tuning plate. A rotating shaft is rotatably mounted within the slot, and a rotating roller is coaxially mounted on the rotating shaft. The fine-tuning plate has a groove matching the rotating roller. Vertical plates are fixed at both ends of the inner scraper, and transmission cavities are provided within the vertical plates. Both ends of the rotating shaft rotatably pass through the inner scraper and the vertical plates and extend into the two transmission cavities respectively. A fixing plate is provided below the vertical plates, and the fixing plate is fixed to the inner scraper. The device includes a drive chamber, through which a vertical rod rotatably passes. The vertical rod is connected to a rotating shaft via a transmission mechanism. Rollers are positioned between the two outer scrapers and the inner scraper, with both ends of each roller rotatably connected to a fixed plate. One end of each roller rotatably passes through the two fixed plates and extends into the drive chamber. A transmission rod is rotatably mounted within the drive chamber. A first pulley is coaxially mounted on the vertical rod, and a second pulley is coaxially mounted on the transmission rod. The first and second pulleys are connected via a synchronous belt. A first bevel gear is coaxially mounted on the transmission rod, and a second bevel gear is coaxially mounted on the rollers. The first and second bevel gears mesh with each other.

[0014] Furthermore, the transmission mechanism includes a transmission wheel, which is coaxially mounted with the vertical rod. A driven wheel is provided above the transmission wheel, and the driven wheel is rotatably connected to the inner wall of the transmission cavity via a connecting shaft. The upper end of the transmission wheel is provided with transmission teeth, and the lower end of the driven wheel is provided with lower teeth that match the transmission teeth. A switching ring and a slip ring are jointly fitted around the driven wheel and the transmission wheel. The slip ring is rotatably connected to the switching ring and slidably connected to the inner wall of the transmission cavity. A meshing block is fixed to the inner wall of the switching ring, and the meshing block matches the transmission teeth and lower teeth. A driving wheel is provided above the driven wheel, and the driving wheel is provided with side teeth that mesh with the upper teeth. The driving wheel is coaxially mounted with the rotating shaft, and a switching mechanism for switching the switching ring is provided inside the transmission cavity.

[0015] Furthermore, the inner ring of the switching ring is arranged in a straight-edged ellipse shape, and the radius of its arc portion is the same as the radius of the driven wheel.

[0016] Furthermore, the switching mechanism includes a fixed shaft rotatably connected to the inner wall of the transmission cavity, a rotating plate and a fixed block fixedly connected to the outside of the fixed shaft, a telescopic rod connected to the lower end of the rotating plate, the lower end of the telescopic rod rotatably connected to a slip ring, a contact block installed on the inner wall of the transmission cavity, the contact block matching the fixed block, both the contact block and the fixed block being electrically connected to a negative pressure motor, and a switching wheel fixedly sleeved on the outside of the rotating shaft, the switching wheel matching the rotating plate.

[0017] Furthermore, the outer scraper has a notch on the side below the inner scraper, which, together with the inner scraper and the fixing plate, forms a cavity. An air extraction pipe is installed outside the outer scraper, which is connected to the cavity and to the air inlet pipe on the negative pressure machine.

[0018] Furthermore, a buffer groove is provided on the side wall of the vertical plate, and a limit rod is fixedly connected inside the buffer groove. A buffer block and a return spring are provided on the outer sleeve of the limit rod. The buffer block is slidably connected to the inner wall of the buffer groove and the limit rod. The upper and lower ends of the return spring are fixed to the buffer block and the inner wall of the buffer groove, respectively. The end of the buffer block away from the bottom of the buffer groove is fixed to the outer scraper.

[0019] Compared with the prior art, the present invention provides a rapid detection device for heavy metals in furniture paint films, which has the following beneficial effects:

[0020] 1. By setting up a processing box, the sampled items can be directly drawn into the processing box for different heavy metal tests. No intermediate steps are required. The samples will not be contaminated by the external environment during testing. It can detect different heavy metal contents in furniture, making the testing convenient and efficient.

[0021] 2. By setting up a scraping mechanism, on the one hand, the back-and-forth sampling of the sample can be performed twice, eliminating the need for multiple subsequent samplings, resulting in high sampling efficiency. The sampling thickness can be customized according to the coating thickness, making it easy to control the amount of sample taken. During sampling, the upper sample with impurities can be scraped off to take the lower sample. The sample taken will not be affected by external interference, and the sampling and testing results are accurate.

[0022] This application is not affected by external interference when sampling furniture for testing, and can detect different heavy metals, which is convenient and the test results are accurate. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the front structure of the present invention;

[0024] Figure 2 This is a front structural perspective view of the present invention;

[0025] Figure 3 This is a perspective view of the internal structure of the present invention;

[0026] Figure 4 This is a schematic diagram showing the positional relationship between the fine-tuning plate and the rotating roller in this invention;

[0027] Figure 5 This is a partial structural schematic diagram of the driving mechanism in this invention;

[0028] Figure 6 This is a perspective view of the scraping mechanism in this invention;

[0029] Figure 7 This is an exploded view showing the positional relationship between the outer scraper and the inner scraper in this invention;

[0030] Figure 8 This is a schematic diagram of the side structure of the vertical plate in this invention;

[0031] Figure 9 This is a diagram showing the internal driving relationship of the scraping mechanism in this invention;

[0032] Figure 10 This is a perspective view of the processing box in this invention;

[0033] Figure 11 This is a schematic diagram of the transmission mechanism in this invention;

[0034] Figure 12 This is a perspective view of the transmission mechanism in this invention;

[0035] Figure 13 This is a schematic diagram of the switching ring structure in this invention;

[0036] Figure 14 This is a partial structural diagram of the switching mechanism in this invention.

[0037] In the diagram: 1. Outer shell; 2. Processing box; 3. Cover plate; 4. Negative pressure unit; 5. Air inlet pipe; 6. Feeding pipe; 7. Agitator; 8. Horizontal plate; 9. Scraping mechanism; 10. Fixing clamp; 11. Electric telescopic rod; 12. Return spring; 13. Fine-tuning plate; 14. Fine-tuning groove; 15. Fine-tuning mechanism; 16. Bidirectional screw; 17. Threaded block; 18. Fine-tuning motor; 19. Rotating shaft; 20. Roller shaft; 21. Connecting belt; 22. Drive mechanism; 23. Drive motor; 24. Drive shaft; 25. Drive gear; 26. Residual gear; 27. Driven gear; 28. Outer scraper; 29. ​​Inner scraper; 30. Outer plate; 31. Grooving; 32. Rotating roller; 33. Rotating shaft; 34. Vertical plate; 35. Fixing plate; 6. Roller; 37. Transmission mechanism; 38. Vertical rod; 39. Transmission rod; 40. First pulley; 41. Second pulley; 42. First bevel gear; 43. Second bevel gear; 44. Switching wheel; 45. Switching mechanism; 46. Fixed shaft; 47. Rotating plate; 48. Telescopic rod; 49. Fixed block; 50. Contact block; 51. Transmission chamber; 52. Drive chamber; 53. Air extraction pipe; 54. Buffer groove; 55. Limiting rod; 56. Buffer block; 57. Driven wheel; 58. Upper tooth; 59. Switching ring; 60. Slip ring; 61. Driving wheel; 62. Side tooth; 63. Meshing block; 64. Strip hole; 65. Deflecting plate; 66. Transmission wheel; 67. Lower tooth; 68. Transmission tooth; 69. Connecting shaft. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] As described in the background section, there are shortcomings in the existing technology. In order to solve the above-mentioned technical problems, this application proposes a rapid detection device for heavy metals in furniture paint films.

[0040] like Figures 1-14 As shown, a rapid detection device for heavy metals in furniture paint film includes a housing 1;

[0041] In this invention, two processing boxes 2 are installed on the upper end of the outer shell 1, and a negative pressure machine 4 is installed between the two processing boxes 2. The negative pressure machine 4 is connected to both processing boxes 2. The negative pressure machine 4 is provided with two air inlet pipes 5. The processing box 2 is covered with a cover plate 3. A feeding pipe 6 and a stirrer 7 are installed on the cover plate 3. The stirrer 7 is matched with the processing box 2.

[0042] It should be noted that the processing box 2 on the right is used to treat the surface coating of the furniture and detect the heavy metal content of the furniture coating by atomic absorption. The processing box 2 on the left is used to treat the furniture board and detect the heavy metal content in the paint scraping on the furniture surface by fluorescence. The detection methods of fluorescence and atomic absorption can detect most of the different heavy metals in the furniture.

[0043] It should be noted that the stirrer 7 can be replaced according to the specific detection method. For example, if the atomic absorption method requires the sample to be treated with a flame, it can be replaced with a flame generator.

[0044] Through the above technical features: after the surface coating of the furniture is scraped off by the inner scraper 29, it is extracted under negative pressure by the negative pressure machine 4, and the coating enters the processing box 2 on the right through the air extraction pipe 53 and the air inlet pipe 5. The coating is broken up by the stirrer 7, and then a specific probe is added through the feeding pipe 6 to form a complex and generate a fluorescent signal. Then, the heavy metal content of the coating is detected by comparing the fluorescence intensity and spectrum. After the surface of the furniture board is scraped off by the inner scraper 29, it is extracted under negative pressure by the negative pressure machine 4, and the board particles enter the processing box 2 on the left through the air extraction pipe 53 and the air inlet pipe 5. The paint particles are broken up by the stirrer 7, and the heavy metals in the furniture paint film are detected by atomic absorption. Different types of heavy metals in the furniture paint film can be detected, which is relatively convenient.

[0045] In this invention, a horizontal plate 8 is installed inside the outer casing 1, and a scraping mechanism 9 is installed at the lower end of the horizontal plate 8. The outer casing 1 is provided with a strip-shaped hole 64 that matches the scraping mechanism 9. A rotating shaft 19 is installed at both ends of the horizontal plate 8, and a roller shaft 20 is installed outside the rotating shaft 19. The roller shafts 20 on both sides are driven by a connecting belt 21, which is fixed to the scraping mechanism 9. A driving mechanism 22 for driving the rotating shaft 19 is provided inside the outer casing 1. A fine-tuning groove 14 is provided at the lower end of the horizontal plate 8, and a fine-tuning plate 13 is slidably installed in the fine-tuning groove 14. A fine-tuning mechanism 15 is provided for fine-tuning the fine-tuning plate 13. It should be noted that the fine-tuning mechanism 15 includes a bidirectional screw 16 rotatably connected to the inner wall of the fine-tuning groove 14. A fine-tuning motor 18 is installed in the fine-tuning groove 14. The drive shaft of the fine-tuning motor 18 is coaxially installed with the bidirectional screw 16. Two threaded blocks 17 are threaded on the external thread of the bidirectional screw 16. Both threaded blocks 17 are slidably connected to the inner wall of the fine-tuning groove 14. A deflection plate 65 is rotatably installed at the lower end of each of the two threaded blocks 17. The lower end of the deflection plate 65 is rotatably connected to the upper end of the fine-tuning plate 13.

[0046] It should be noted that the fine-tuning plate 13 has inclined surfaces on both the left and right sides, with the inclined surfaces facing downwards.

[0047] In this invention, the drive mechanism 22 includes two drive shafts 24 rotatably mounted to the inner wall of the outer casing 1. A drive motor 23 is installed inside the outer casing 1. The drive shaft of the drive motor 23 is coaxially mounted with one of the drive shafts 24. Both drive shafts 24 are coaxially mounted with drive gears 25, which mesh with each other. Both drive shafts 24 are coaxially mounted with residual gears 26. It is worth mentioning that the tooth distribution angle of the two residual gears 26 is 180°, and the tooth orientation of the two residual gears 26 is opposite. A driven gear 27 is coaxially mounted on the rotating shaft 19, and the driven gear 27 matches both residual gears 26.

[0048] Through the above technical features: the fixing clamp 10 is clamped onto the furniture, and the height of the outer shell 1 is adjusted by the electric telescopic rod 11, so that the outer scraper 28 is inserted into the surface of the furniture. The drive motor 23 drives the two drive shafts 24 to rotate relative to each other. The two drive shafts 24 drive the residual gears 26 to rotate. When the two residual gears 26 rotate, they will drive the driven gears 27 to rotate in both directions. The driven gears 27 drive the roller shaft 20 to rotate back and forth through the rotating shaft 19. The roller shaft 20 drives the scraping mechanism 9 to move back and forth through the connecting belt 21, so that the scraping mechanism 9 moves along the lower surface of the fine adjustment plate 13. When scraping and sampling through the scraping mechanism 9, sampling can be carried out by scraping back and forth to both sides, which is more convenient for sampling the surface of the furniture. The fine adjustment motor 18 drives the bidirectional screw 16 to rotate. The bidirectional screw 16 drives the two threaded blocks 17 to move relative to each other. The two threaded blocks 17 drive the fine adjustment plate 13 to rise and fall through the deflection plate 65. It should be noted that Under the elastic action of the return spring 12, the inner scraper 29 tends to move upward. At this time, the rotating roller 32 always abuts against the fine-tuning plate 13. When the fine-tuning plate 13 moves up and down, the rotating roller 32 will always abut against the fine-tuning plate 13. The fine-tuning plate 13 will drive the inner scraper 29 to rise and fall, thereby changing the relative position between the inner scraper 29 and the outer scraper 28. When the connecting belt 21 drives the scraping mechanism 9 to move, on the one hand, the outer scraper 28 scrapes the surface of the furniture to remove impurities attached to the surface of the furniture. On the other hand, by controlling the height of the fine-tuning plate 13, the depth of the inner scraper 29 scraping the surface of the furniture can be indirectly controlled. It can be adjusted according to the coating thickness and sampling amount of the furniture. When sampling the furniture, the outer scraper 28 scrapes off surface impurities, avoiding the influence of external impurities. The inner scraper 29 takes samples, and the negative pressure of the negative pressure machine 4 draws the samples into the processing box 2 for testing. The test results of the furniture are relatively accurate.

[0049] In this invention, the scraping mechanism 9 includes two outer scrapers 28 and one inner scraper 29. It should be noted that the lower part of the outer scraper 28 near the inner scraper 29 is notched, forming a cavity with the inner scraper 29 and the fixing plate 35. An air extraction pipe 53 is installed on the outer scraper 28, and the air extraction pipe 53 is connected to the cavity and the air inlet pipe 5 on the negative pressure machine 4. The inner scraper 29 is located between the two outer scrapers 28 and is slidably connected to the two outer scrapers 28. The two outer scrapers 28 are fixed together by an outer plate 30. The upper ends of the outer scrapers 28 and the inner scraper 29 are provided with a slot 31, which matches the fine adjustment plate 13. A rotating shaft 33 is rotatably installed in the slot 31, and a rotating roller 32 is coaxially installed on the rotating shaft 33. The fine adjustment plate 13 is provided with a rolling groove that matches the rotating roller 32. Vertical plates 34 are fixed at both ends of the inner scraper 29.

[0050] In this invention, a buffer groove 54 is provided on the side wall of the vertical plate 34. A limiting rod 55 is fixedly connected inside the buffer groove 54. A buffer block 56 and a return spring 12 are provided on the outer sleeve of the limiting rod 55. The buffer block 56 is slidably connected to the inner wall of the buffer groove 54 and the limiting rod 55. The upper and lower ends of the return spring 12 are fixed to the buffer block 56 and the inner wall of the buffer groove 54, respectively. One end of the buffer block 56 away from the bottom of the buffer groove 54 is fixed to the outer scraper 28.

[0051] In this invention, a transmission cavity 51 is provided inside the vertical plate 34. Both ends of the rotating shaft 33 rotatably pass through the inner scraper 29 and the vertical plate 34 and extend into the two transmission cavities 51 respectively. A fixing plate 35 is provided below the vertical plate 34, and the fixing plate 35 is fixed to the inner scraper 29. A driving cavity 52 is provided inside the fixing plate 35. A vertical rod 38 rotatably passes through the driving cavity 52 and the transmission cavity 51. The vertical rod 38 and the rotating shaft 33 are connected by a transmission mechanism 37. It should be noted that the transmission mechanism 37 includes a transmission wheel 66, which is coaxially mounted with the vertical rod 38. A driven wheel 57 is provided above the transmission wheel 66. The driven wheel 57 is rotatably connected to the inner wall of the transmission cavity 51 through a connecting shaft 69. A transmission tooth 68 is provided at the upper end of the transmission wheel 66, and a lower tooth 67 matching the transmission tooth 68 is provided at the lower end of the driven wheel 57. A switching ring 59 and a slip ring 6 are fitted together on the driven wheel 57 and the transmission wheel 66. It is worth mentioning that the inner ring of the switching ring 59 is set in a straight-edged ellipse. It should be noted that the inner rings of the two switching rings 59 located in the two transmission cavities 51 face opposite directions, and the radius of their arc portion is the same as the radius of the driven wheel 57. The slip ring 60 is rotatably connected to the switching ring 59, and the slip ring 60 is slidably connected to the inner wall of the transmission cavity 51. The inner wall of the switching ring 59 is fixed with a meshing block 63. It should be noted that the center of the switching ring 59 on the side of the meshing block 63 and the center of the driven wheel 57 are on the same central axis when the meshing block 63 meshes with the lower tooth 67. The meshing block 63 matches the transmission tooth 68 and the lower tooth 67. A driving wheel 61 is provided above the driven wheel 57. The driving wheel 61 is provided with a side tooth 62, which meshes with the upper tooth 58. The driving wheel 61 is coaxially installed with the rotating shaft 33. The transmission cavity 51 is provided with a switching mechanism 45 for switching the switching ring 59.

[0052] In this invention, the switching mechanism 45 includes a fixed shaft 46 rotatably connected to the inner wall of the transmission cavity 51. A rotating plate 47 and a fixed block 49 are fixedly connected to the outside of the fixed shaft 46. It should be noted that the fixed shaft 46 rotates with the inner wall of the transmission cavity 51 through a spiral spring. When there is no interference from the switching wheel 44, the rotating plate 47 remains vertical. A telescopic rod 48 is connected to the lower end of the rotating plate 47. The lower end of the telescopic rod 48 is rotatably connected to the slip ring 60. A contact block 50 is installed on the inner wall of the transmission cavity 51. The contact block 50 matches the fixed block 49. Both the contact block 50 and the fixed block 49 are electrically connected to the negative pressure machine 4. A switching wheel 44 is fixedly sleeved on the outside of the rotating shaft 33. The switching wheel 44 matches the rotating plate 47.

[0053] In this invention, a rolling roller 36 is provided between the two outer scrapers 28 and the inner scraper 29. Both ends of the rolling roller 36 are rotatably connected to the fixed plate 35. One end of each rolling roller 36 rotatably passes through the two fixed plates 35 and extends into the drive cavity 52. ​​A transmission rod 39 is rotatably installed in the drive cavity 52. ​​A first pulley 40 is coaxially installed on the vertical rod 38, and a second pulley 41 is coaxially installed on the transmission rod 39. The first pulley 40 and the second pulley 41 are connected by a synchronous belt. A first bevel gear 42 is coaxially installed on the transmission rod 39, and a second bevel gear 43 is coaxially installed on the rolling roller 36. The first bevel gear 42 and the second bevel gear 43 are meshed together.

[0054] Through the above technical features: Figure 2 Taking the direction in the middle as the standard, when the scraping mechanism 9 samples to the right, the scraping mechanism 9 moves to the right, and the rotating roller 32 moves to the right. Since the rotating roller 32 rolls on the fine-tuning plate 13, the rotating roller 32 rotates counterclockwise, driving the rotating shaft 33 to rotate counterclockwise. The rotating shaft 33 drives the switching wheel 44 and the driving wheel 61 to rotate counterclockwise. At this time, the rotating plate 47 located on the front side deflects to the right under the action of the switching wheel 44. The rotating plate 47 drives the slip ring 6 through the telescopic rod 48. Move 0 to the left, and slip ring 60 drives meshing block 63 to move, so that meshing block 63 meshes with lower tooth 67 and transmission tooth 68. At this time, the driving wheel 61 drives driven wheel 57 to rotate under the action of side tooth 62 and upper tooth 58. Driven wheel 57 drives transmission wheel 66 to rotate through meshing block 63. Transmission wheel 66 drives vertical rod 38 to rotate. Vertical rod 38 drives transmission rod 39 to drive right-side crushing roller 36 to rotate, so that crushing roller 36 scrapes off the inner scraper 29. The coating is initially crushed and broken. It should be noted that when the rotating plate 47 rotates, the rotating plate 47 drives the fixed block 49 to rotate through the fixed shaft 46. The fixed block 49 located on the front side abuts against the contact block 50, and the power supply of the negative pressure machine 4 to the right processing box 2 is turned on. At this time, the negative pressure machine 4 sucks the scraped coating into the right processing box 2 through the air extraction pipe 53. At the same time, the rotating plate 47 located on the rear side is deflected to the right by the switching wheel 44. The rotating plate 47 drives the slip ring 60 to move to the left through the telescopic rod 48. The slip ring 60 drives the meshing block 63 to move. Since the inner ring of the rear switching ring 59 faces the opposite direction to the inner ring of the front switching ring 59, the meshing block 63 is separated from the lower tooth 67 and the transmission tooth 68. At this time, when the driving wheel 61 drives the switching ring 59 to rotate, since there is no connection between the switching ring 59 and the transmission wheel 66, it cannot drive the transmission wheel 66 to rotate. That is, the crushing roller 36 located on the left side remains stationary.

[0055] Similarly, when the scraping mechanism 9 samples to the left, the left rolling roller 36 rotates while the right rolling roller 36 remains stationary, crushing the scraped coating. The power supply from the negative pressure machine 4 to the left processing box 2 is then turned on, and the coating is drawn into the left processing box 2 through the suction pipe 53.

[0056] It should be noted that during sampling, the initial sampling (for ease of representation, the initial sampling is set to move to the right) samples the surface coating of the furniture. The electric telescopic rod 11 controls the depth of insertion of the outer scraper 28 into the coating. The outer scraper 28 scrapes off the surface coating, and the inner scraper 29 samples the lower coating to complete the coating sampling. The second sampling (moving to the left) samples the board material under the furniture coating. The electric telescopic rod 11 controls the insertion of the outer scraper 28 under the coating and against the board material. The outer scraper 28 scrapes off the coating, and the outer scraper 28 samples the board material after the coating has been scraped off. The samples taken from the two samplings are sent to two processing boxes 2 for testing, which is convenient for testing different heavy metals in furniture.

[0057] In this invention, an electric telescopic rod 11 is installed at the lower end of the outer shell 1, and a fixing clamp 10 is installed at the lower end of the electric telescopic rod 11.

[0058] Working principle:

[0059] 1) Sampling: The fixing clamp 10 is clamped onto the furniture. The height of the outer shell 1 is adjusted by the electric telescopic rod 11, so that the outer scraper 28 is inserted into the surface of the furniture's paint film. The drive motor 23 drives the two drive shafts 24 to rotate relative to each other. The two drive shafts 24 drive the residual gears 26 to rotate. When the two residual gears 26 rotate, they will drive the driven gears 27 to rotate in opposite directions in turn. The driven gears 27 drive the roller shaft 20 to rotate back and forth through the rotating shaft 19. The roller shaft 20 drives the scraping mechanism 9 to move back and forth through the connecting belt 21, so that the scraping mechanism 9 moves along the lower surface of the fine-tuning plate 13. When the scraping mechanism 9 moves to the right... During sampling, the scraping mechanism 9 moves to the right, and the rotating roller 32 moves to the right. Since the rotating roller 32 rolls on the fine-tuning plate 13, it rotates counterclockwise, causing the rotating shaft 33 to rotate counterclockwise. The rotating shaft 33 then drives the switching wheel 44 and the driving wheel 61 to rotate counterclockwise. At this time, the rotating plate 47, located at the front, deflects to the right under the influence of the switching wheel 44. The rotating plate 47, through the telescopic rod 48, drives the slip ring 60 to move to the left. The slip ring 60 drives the meshing block 63 to move, causing the meshing block 63 to mesh with the lower tooth 67 and the transmission tooth 68. At this time, the driving wheel 61 meshes with the side tooth 62 and the upper tooth 58. The driven wheel 57 rotates under the action of the action, and the driven wheel 57 drives the transmission wheel 66 to rotate through the meshing block 63. The transmission wheel 66 drives the vertical rod 38 to rotate, and the vertical rod 38 drives the transmission rod 39 to drive the right-side crushing roller 36 to rotate. This causes the crushing roller 36 to initially crush the coating scraped off by the inner scraper 29. It should be noted that when the rotating plate 47 rotates, the rotating plate 47 drives the fixed block 49 to rotate through the fixed shaft 46. The fixed block 49 located on the front side abuts against the contact block 50, connecting the power supply of the negative pressure machine 4 to the right-side processing box 2. At this time, the negative pressure machine 4 uses the suction pipe 53 to remove the scraped coating. The material is sucked into the right-side processing box 2. At the same time, the rotating plate 47 located on the rear side is deflected to the right by the switching wheel 44. The rotating plate 47 drives the slip ring 60 to move to the left through the telescopic rod 48. The slip ring 60 drives the meshing block 63 to move. Since the inner ring of the rear switching ring 59 faces the opposite direction to the inner ring of the front switching ring 59, the meshing block 63 is separated from the lower tooth 67 and the transmission tooth 68. When the driving wheel 61 drives the switching ring 59 to rotate, since there is no connection between the switching ring 59 and the transmission wheel 66, it cannot drive the transmission wheel 66 to rotate. That is, the rolling roller 36 located on the left side remains stationary.

[0060] Similarly, when the scraping mechanism 9 samples to the left, the left rolling roller 36 rotates while the right rolling roller 36 remains stationary, crushing the scraped coating. The power supply from the negative pressure machine 4 to the left processing box 2 is then turned on, and the coating is drawn into the left processing box 2 through the suction pipe 53.

[0061] The samples of the furniture paint film can then be introduced into two separate processing boxes 2 for testing.

[0062] 2) Detection: After the furniture coating is scraped off by the inner scraper 29, it is extracted under negative pressure by the negative pressure machine 4, and the coating enters the processing box 2 on the right through the air extraction pipe 53 and the air inlet pipe 5. The coating is broken up by the stirrer 7, and then a specific probe is added through the feeding pipe 6 to form a complex and generate a fluorescent signal. The heavy metal content of the coating is then detected by comparing the fluorescence intensity and spectrum. After the furniture paint film is scraped off by the inner scraper 29, it is extracted under negative pressure by the negative pressure machine 4, and the paint film particles enter the processing box 2 on the left through the air extraction pipe 53 and the air inlet pipe 5. The paint film particles are broken up by the stirrer 7, and different types of heavy metals in the furniture are detected by atomic absorption.

[0063] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0064] The detailed descriptions listed above are merely specific descriptions of feasible implementation methods of this application and are not intended to limit the scope of protection of this application. All equivalent implementation methods or modifications made without departing from the spirit of the art of this application should be included within the scope of protection of this invention.

Claims

1. A rapid detection device for heavy metals in furniture paint films, characterized in that: Including the outer casing (1); Two processing boxes (2) are installed on the upper end of the outer shell (1). A negative pressure machine (4) is installed between the two processing boxes (2). The negative pressure machine (4) is connected to both processing boxes (2). Two air inlet pipes (5) are provided on the negative pressure machine (4). A cover plate (3) is provided on the processing box (2). A feeding pipe (6) and a stirrer (7) are installed on the cover plate (3). The stirrer (7) is matched with the processing box (2). A horizontal plate (8) is installed inside the outer casing (1). A scraping mechanism (9) is installed at the lower end of the horizontal plate (8). A strip hole (64) matching the scraping mechanism (9) is provided on the outer casing (1). A rotating shaft (19) is installed at both ends of the horizontal plate (8). A roller shaft (20) is installed outside the rotating shaft (19). The roller shafts (20) on both sides are driven by a connecting belt (21). The connecting belt (21) is fixed to the scraping mechanism (9). A driving mechanism (22) for driving the rotating shaft (19) is provided inside the outer casing (1). A fine adjustment groove (14) is provided at the lower end of the horizontal plate (8). A fine adjustment plate (13) is slidably installed in the fine adjustment groove (14). A fine adjustment mechanism (15) for fine adjustment of the fine adjustment plate (13) is provided in the fine adjustment groove (14). The scraping mechanism (9) includes two outer scrapers (28) and one inner scraper (29). The inner scraper (29) is located between the two outer scrapers (28) and is slidably connected to them. The two outer scrapers (28) are fixed together by an outer plate (30). The upper ends of the outer scrapers (28) and the inner scraper (29) are provided with a slot (31). The slot (31) matches the fine-tuning plate (13). A rotating shaft (33) is rotatably installed in the slot (31). A rotating roller (32) is coaxially installed on the rotating shaft (33). The fine-tuning plate (13) is provided with a groove that matches the rotating roller (32). Both ends of the inner scraper (29) are fixed with vertical plates (34). The vertical plates (34) are provided with transmission chambers (51). Both ends of the rotating shaft (33) rotatably pass through the inner scraper (29) and the vertical plates (34) and extend into the two transmission chambers (51) respectively. A fixing plate (35) is provided below the vertical plates (34). The fixing plate (35) is fixed to the inner scraper (29). The fixing plate (35) is provided with a driving chamber (52). A vertical rod (38) rotatably passes through the driving chamber (52) and the transmission chamber (51). The vertical rod (38) is connected to the rotating shaft (33) through a transmission mechanism (37). An electric telescopic rod (11) is installed at the lower end of the outer shell (1), and a fixing clamp (10) is installed at the lower end of the electric telescopic rod (11).

2. The rapid detection device for heavy metals in furniture paint film according to claim 1, characterized in that: The drive mechanism (22) includes two drive shafts (24) rotatably mounted to the inner wall of the housing (1). A drive motor (23) is installed inside the housing (1). The drive shaft of the drive motor (23) is coaxially mounted with one of the drive shafts (24). Both drive shafts (24) are coaxially mounted with drive gears (25). The two drive gears (25) are meshed together. Both drive shafts (24) are coaxially mounted with residual gears (26). A driven gear (27) is coaxially mounted on the rotating shaft (19). The driven gear (27) matches both residual gears (26).

3. The rapid detection device for heavy metals in furniture paint film according to claim 2, characterized in that: The tooth distribution angle of the two residual gears (26) is 180°, and the teeth of the two residual gears (26) face opposite directions.

4. The rapid detection device for heavy metals in furniture paint film according to claim 1, characterized in that: The fine-tuning mechanism (15) includes a bidirectional screw (16) rotatably connected to the inner wall of the fine-tuning groove (14). A fine-tuning motor (18) is installed in the fine-tuning groove (14). The drive shaft of the fine-tuning motor (18) is coaxially installed with the bidirectional screw (16). Two threaded blocks (17) are threaded on the outer thread of the bidirectional screw (16). Both threaded blocks (17) are slidably connected to the inner wall of the fine-tuning groove (14). A deflection plate (65) is rotatably installed at the lower end of each of the two threaded blocks (17). The lower end of the deflection plate (65) is rotatably connected to the upper end of the fine-tuning plate (13).

5. The rapid detection device for heavy metals in furniture paint film according to claim 1, characterized in that: A rolling roller (36) is provided between the two outer scrapers (28) and the inner scraper (29). Both ends of the rolling roller (36) are rotatably connected to the fixed plate (35). One end of each of the two rolling rollers (36) rotatably passes through the two fixed plates (35) and extends into the drive cavity (52). A transmission rod (39) is rotatably installed in the drive cavity (52). A first pulley (40) is coaxially installed on the vertical rod (38). A second pulley (41) is coaxially installed on the transmission rod (39). The first pulley (40) and the second pulley (41) are connected by a synchronous belt. A first bevel gear (42) is coaxially installed on the transmission rod (39). A second bevel gear (43) is coaxially installed on the rolling roller (36). The first bevel gear (42) and the second bevel gear (43) are meshed together.

6. The rapid detection device for heavy metals in furniture paint film according to claim 1, characterized in that: The transmission mechanism (37) includes a transmission wheel (66), which is coaxially mounted with the vertical rod (38). A driven wheel (57) is provided above the transmission wheel (66). The driven wheel (57) is rotatably connected to the inner wall of the transmission cavity (51) through a connecting shaft (69). The upper end of the transmission wheel (66) is provided with transmission teeth (68), and the lower end of the driven wheel (57) is provided with lower teeth (67) that match the transmission teeth (68). A switching ring (59) and a slip ring (60) are jointly fitted around the driven wheel (57) and the transmission wheel (66). The slip ring (60) and the switching ring (59) are connected together. 59) Rotary connection, the slip ring (60) is slidably connected to the inner wall of the transmission cavity (51), the inner wall of the switching ring (59) is fixed with a meshing block (63), the meshing block (63) is matched with the transmission teeth (68) and the lower teeth (67), the driven wheel (57) is provided with a driving wheel (61) above it, the driving wheel (61) is provided with a side tooth (62), the side tooth (62) is meshed with the upper tooth (58), the driving wheel (61) is coaxially installed with the rotating shaft (33), and the transmission cavity (51) is provided with a switching mechanism (45) for switching the switching ring (59).

7. The rapid detection device for heavy metals in furniture paint film according to claim 6, characterized in that: The inner ring of the switching ring (59) is set in a straight-edged ellipse, and the radius of its arc portion is the same as the radius of the driven wheel (57).

8. The rapid detection device for heavy metals in furniture paint film according to claim 6, characterized in that: The switching mechanism (45) includes a fixed shaft (46) rotatably connected to the inner wall of the transmission cavity (51). A rotating plate (47) and a fixed block (49) are fixedly connected to the outside of the fixed shaft (46). A telescopic rod (48) is connected to the lower end of the rotating plate (47). The lower end of the telescopic rod (48) is rotatably connected to a slip ring (60). A contact block (50) is installed on the inner wall of the transmission cavity (51). The contact block (50) matches the fixed block (49). Both the contact block (50) and the fixed block (49) are electrically connected to the negative pressure machine (4). A switching wheel (44) is fixedly sleeved on the outside of the rotating shaft (33). The switching wheel (44) matches the rotating plate (47).

9. A rapid detection device for heavy metals in furniture paint film according to claim 5, characterized in that: The outer scraper (28) has a notch on the side below the inner scraper (29) and is combined with the inner scraper (29) and the fixing plate (35) to form a cavity. An air extraction pipe (53) is installed on the outside of the outer scraper (28). The air extraction pipe (53) is connected to the cavity and is connected to the air inlet pipe (5) on the negative pressure machine (4).

10. A rapid detection device for heavy metals in furniture paint films according to claim 5, characterized in that: The side wall of the vertical plate (34) is provided with a buffer groove (54). A limit rod (55) is fixedly connected inside the buffer groove (54). A buffer block (56) and a return spring (12) are provided on the outer sleeve of the limit rod (55). The buffer block (56) is slidably connected to the inner wall of the buffer groove (54) and the limit rod (55). The upper and lower ends of the return spring (12) are fixed to the buffer block (56) and the inner wall of the buffer groove (54) respectively. The end of the buffer block (56) away from the bottom of the buffer groove (54) is fixed to the outer scraper (28).

Images