A device for measuring dust concentration

Abstract

The invention relates to the technical field of dust concentration measurement, and specifically discloses a device for measuring dust concentration, comprising a mounting mechanism and a detection mechanism, wherein an unwinding mechanism for releasing filter paper is provided on one side of the interior of the mounting mechanism, a folding mechanism for splicing filter paper is provided on one side of the unwinding mechanism, and a conveying mechanism for driving the used filter paper to move is installed on one side of the inner wall of the mounting mechanism; the device for measuring dust concentration of the invention can make the end of the filter paper that is about to be used hook the head end of the unused filter paper to complete the splicing of the filter paper, thereby completing the replacement of the filter paper, and no manual intervention is required during the filter paper replacement process, so as to prevent external dust and staff from polluting the filter paper, and avoid affecting the accuracy of dust concentration measurement.

Description

Technical Field

[0001] The invention relates to the technical field of dust concentration measurement, and in particular to a device for measuring dust concentration. Background Art

[0002] The β-ray dust concentration meter is an instrument used to measure the dust concentration in the gas. Its principle is to install a radioactive isotope source in the instrument, and irradiate the β-rays onto the filter paper tape containing dust. Since the dust absorbs the β-rays, its intensity is attenuated, and its attenuation is proportional to the weight of the dust deposited on the filter paper. The mass concentration of the dust can be obtained by measuring the difference in the intensity attenuation of the filter paper to the β-rays before and after sampling. As the paper tape continues to move, the change of dust concentration over time within a certain period of time can be continuously measured, so as to obtain the change trend of dust concentration. It is mainly suitable for various research institutions, meteorology, public hygiene, industrial labor hygiene engineering, atmospheric pollution research, industrial and mining production sites, etc.

[0003] A Chinese patent document with authorization announcement number CN221926038U discloses a portable beta-ray dust concentration measuring instrument. The portable beta-ray dust concentration measuring instrument can be conveniently carried to a designated detection location for rapid detection without the need for other supporting equipment, making it more convenient to use.

[0004] However, the structural design of the above-mentioned related technology is as follows: during the long-term dust concentration measurement process, when the filter paper is used up, the filter paper needs to be replaced in time. However, in the process of replacing the filter paper, it is necessary to open the measuring instrument first, then remove the used filter paper tube, and finally replace it with a new filter paper and pull the filter paper head onto the winding roller. This replacement method not only requires manual operation during the replacement process, but also in the process of replacing the filter paper, especially when the measuring instrument is in the production site of an industrial and mining enterprise, the filter paper is easily contaminated by dust in the production environment, thereby affecting the measurement accuracy of the dust concentration.

[0005] Therefore, a device for measuring dust concentration is proposed to solve the above problems. Summary of the invention

[0006] The present invention provides a device for measuring dust concentration, aiming to solve the problems in the related art that manual operation is required for filter paper replacement and the filter paper is easily contaminated by dust in the production environment during the replacement process.

[0007] The device for measuring dust concentration of the present invention comprises a mounting mechanism and a detection mechanism, wherein a reeling mechanism for releasing filter paper is provided on one side of the interior of the mounting mechanism, a folding mechanism for splicing filter paper is provided on one side of the reeling mechanism, and a conveying mechanism for driving the used filter paper to move is installed on one side of the inner wall of the mounting mechanism;

[0008] The unwinding mechanism comprises a rotating plate rotatably connected to the mounting mechanism, two placing covers distributed up and down on the rotating plate, and a rotating shaft rotatably connected to the two placing covers, and a notch is provided on the placing cover for the end of the filter paper to extend out;

[0009] The folding mechanism includes a mounting frame, a folding component 1 and a folding component 2. The mounting frame is mounted inside the mounting mechanism and is arranged close to the detection mechanism. The folding component 1 is arranged on one side of the inner bottom wall of the mounting frame to fold the head end of the unused filter paper. The folding component 2 is arranged on one side of the inner top wall of the mounting frame to fold the end of the filter paper that is about to be used, so that the head end of the unused filter paper is connected with the end of the filter paper that is about to be used by a folding hook.

[0010] When the filter paper is about to be used up, the rotating plate rotates to move the unused filter paper roll upwards, and through the rotation of the rotating shaft, the end of the filter paper is guided by the guide plate into the installation frame, and then the radiator is lifted, and at the same time, the second pressing plate presses the filter paper that is about to be used on the inner top wall of the installation frame, and the first pressing plate presses the unused filter paper on the inner bottom wall of the installation frame, and then the folding component one folds the head end of the unused filter paper, and the folding component two folds the end of the filter paper that is about to be used, and finally the unused filter paper is moved to the bottom of the filter paper that is about to be used, so that the end of the filter paper that is about to be used can hook the head end of the unused filter paper to complete the splicing of the filter paper, thereby completing the replacement of the filter paper, and no manual intervention is required during the filter paper replacement process.

[0011] Preferably, the installation mechanism includes an installation box and a collection box installed on one side of the installation box, a paper outlet is provided between the installation box and the collection box, two box doors are hinged on the front side of the installation box, a filling hole for loading filter paper rolls is opened on the box door, and a sealing plug is provided in the filling hole of the box door.

[0012] By pulling out the sealing plug, the filling hole can be opened to replenish a new filter paper roll to the unwinding mechanism.

[0013] Preferably, the installation frame is installed on the inner wall of the installation box, and a guide plate is provided on the installation frame to guide the filter paper into the installation frame. The inner top wall and inner bottom wall of the installation frame are respectively slidably connected with pressure plate one and pressure plate two, and a baffle is installed on one side of the interior of the installation frame.

[0014] The baffle plate can limit the joint of the two filter papers to prevent the two filter papers from being disconnected during movement.

[0015] Preferably, the folding component includes a folding plate, a sliding rod, a rotating shaft and a push plate. The folding plate is hinged on the inner bottom wall of the mounting frame and is arranged on a side close to the pressure plate. The sliding rod is installed on the folding plate. The rotating shaft is rotatably connected to the mounting frame. Two push plates are installed on the outer side of the rotating shaft for pushing the sliding rod to move.

[0016] Preferably, the folding component 2 includes a folding plate 2, a sliding rod 2, a rotating shaft 2 and a push plate 2. The folding plate 2 is hinged on the inner top wall of the mounting frame and is arranged on one side close to the pressure plate 2. The sliding rod 2 is installed on the folding plate 2. The rotating shaft 2 is rotatably connected to the mounting frame. Two push plates 2 for pushing the sliding rod 2 to move are installed on the outer side of the rotating shaft 2.

[0017] Preferably, the conveying mechanism includes a connecting frame and a pressure roller rotatably connected to the connecting frame, one side of the connecting frame is installed on one side of the inner wall of the installation box, and one side of the connecting frame corresponds to the paper outlet on the installation box.

[0018] The rotation of the pressing roller can drive the used filter paper to move.

[0019] Preferably, the detection mechanism includes a heating tube, a connecting tube, a fixing frame, a radiator and a detector, the connecting tube is installed on the inner top wall of the installation box, the fixing frame is installed on the inner wall of the installation box, the radiator is slidably connected to the outer side of the connecting tube, a spring is installed between the fixing frame and the radiator, and the bottom end of the radiator is in contact with the top end of the detector.

[0020] Preferably, an adjusting mechanism is provided on the mounting frame, and the adjusting mechanism comprises a telescopic member installed on the top of the mounting frame and a lifting plate on the telescopic member, and one end of the lifting plate is installed on the radiator to lift the radiator.

[0021] The lifting plate can be driven upward by the telescopic member, and the radiator can be driven upward during the lifting process, so that the filter paper passes between the radiator and the detector. At the same time, the joint of the two filter papers can be limited by the radiator.

[0022] Preferably, connecting rods fixed to the two pressure plates are installed on both sides of the lifting plate, two connecting plates are installed at the bottom of the lifting plate, a push rod is installed between the two connecting plates, an adjusting plate is movably connected to the push rod, a mounting plate is movably connected to the adjusting plate, a fixing rod fixed to one pressure plate is installed on the mounting plate, and two brackets rotatably connected to the adjusting plate are installed on the top of the mounting frame.

[0023] By adopting the above technical scheme, the beneficial effects of the present invention are as follows: the rotating plate rotates to move the unused filter paper roll upwards, and the end of the filter paper enters the installation frame through the guide plate through the rotation of the rotating shaft, and then the radiator is lifted, and at the same time, the pressing plate 2 and the pressing plate 1 respectively press the two filter papers, and then the folding component 1 folds the head end of the unused filter paper, and the folding component 2 folds the end of the filter paper that is about to be used, and finally the unused filter paper is moved to the bottom of the filter paper that is about to be used, so that the end of the filter paper that is about to be used can be hooked on the head end of the unused filter paper to complete the splicing of the filter paper, thereby completing the replacement of the filter paper, and no manual intervention is required during the filter paper replacement process to prevent external dust and staff from polluting the filter paper and avoiding affecting the accuracy of dust concentration measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of a specific embodiment of the present invention.

[0025] Figure 2 It is a structural schematic diagram of the installation mechanism of a specific embodiment of the present invention.

[0026] Figure 3 It is a schematic diagram of the internal structure of the installation box of a specific embodiment of the present invention.

[0027] Figure 4 It is a structural schematic diagram of the unwinding mechanism of a specific embodiment of the present invention.

[0028] Figure 5 It is a schematic cross-sectional structure diagram of a mounting frame according to a specific embodiment of the present invention.

[0029] Figure 6 It is a schematic diagram of the partial structure of the installation frame of a specific embodiment of the present invention.

[0030] Figure 7 It is a schematic diagram of the structure of folding component 1 and folding component 2 in a specific embodiment of the present invention.

[0031] Figure 8 It is a schematic structural diagram of a conveying mechanism in a specific embodiment of the present invention.

[0032] Fig. 9 It is a structural schematic diagram of the adjustment mechanism of a specific embodiment of the present invention.

[0033] Reference numerals:

[0034] 10. Installation mechanism; 11. Installation box; 12. Collection box; 13. Box door 1; 14. Sealing plug; 15. Box door 2;

[0035] 20. Detection mechanism; 21. Heating tube; 22. Connecting tube; 23. Fixing frame; 24. Emitter; 25. Detector;

[0036] 30. Unwinding mechanism; 31. Rotating plate; 32. Connecting column; 33. Motor 1; 34. Placement cover; 35. Rotating shaft; 36. Gear 1; 37. Gear 2; 38. Motor 2;

[0037] 40. Folding mechanism; 41. Mounting frame; 42. Guide plate; 43. Pressing plate 1; 44. Pressing plate 2; 45. Baffle plate; 46. Folding assembly 1; 461. Folding plate 1; 462. Sliding rod 1; 463. Rotating shaft 1; 464. Pushing plate 1; 465. Transmission wheel 1; 47. Folding assembly 2; 471. Folding plate 2; 472. Sliding rod 2; 473. Rotating shaft 2; 474. Pushing plate 2; 475. Transmission wheel 2; 48. Guide groove; 49. Motor 1;

[0038] 50. conveying mechanism; 51. connecting frame; 52. pressing roller; 53. motor 2;

[0039] 60. Adjustment mechanism; 61. Telescopic member; 62. Lifting plate; 63. Connecting rod; 64. Connecting plate; 65. Push rod; 66. Bracket; 67. Adjustment plate; 68. Mounting plate; 69. Fixing rod. DETAILED DESCRIPTION

[0040] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0041] like Figures 1 to 9 As shown, the device for measuring dust concentration of the present invention comprises a mounting mechanism 10, a detection mechanism 20, an unwinding mechanism 30, a folding mechanism 40, a conveying mechanism 50 and an adjusting mechanism 60. The detection mechanism 20 is arranged on the mounting mechanism 10 to measure the dust concentration, the unwinding mechanism 30 is arranged on one side of the interior of the mounting mechanism 10, and is used to release the filter paper. The folding mechanism 40 is arranged between the detection mechanism 20 and the unwinding mechanism 30, and is used to connect the filter paper. The conveying mechanism 50 is arranged on the other side of the interior of the mounting mechanism 10 and is arranged close to the detection mechanism 20, and is used to drive the filter paper to move after use. The adjusting mechanism 60 is installed on the folding mechanism 40.

[0042] like Figures 1 to 3As shown, the installation mechanism 10 includes an installation box 11 and a collection box 12 installed on one side of the installation box 11. The detection mechanism 20, the unwinding mechanism 30, the folding mechanism 40, the conveying mechanism 50 and the adjustment mechanism 60 are all located in the installation box 11. Two box doors 13 are hinged on the front side of the installation box 11. The box door 13 is provided with a filling hole for filling the filter paper roll. The filling hole of the box door 13 is provided with a sealing plug 14. After the sealing plug 14 is pulled out, it can be replenished on the unwinding mechanism 30. The front side of the collection box 12 is hinged with a box door 2 15. A display screen is provided on the upper front side of the box door 2 15, and a transparent glass is provided on the lower front side of the box door 2 15.

[0043] like Figures 1 to 3 As shown, the detection mechanism 20 includes a heating tube 21, a connecting tube 22, a fixing frame 23, a radiator 24 and a detector 25. The connecting tube 22 is mounted on the inner top wall of the installation box 11, and the bottom end of the connecting tube 22 penetrates the fixing frame 23 and extends to the inside of the fixing frame 23. The fixing frame 23 is mounted on the inner wall of the installation box 11, and the radiator 24 is slidably connected to the outside of the bottom end of the connecting tube 22, and a spring is installed between the fixing frame 23 and the radiator 24. The bottom end of the radiator 24 penetrates the fixing frame 23 and extends to the outside of the fixing frame 23, and the detector 25 is mounted inside the installation box 11 and contacts the bottom end of the radiator 24.

[0044] like Figure 3 to Figure 4 As shown, the unwinding mechanism 30 includes a rotating plate 31, a connecting column 32, a placement cover 34 and a rotating shaft 35. One end of the connecting column 32 is rotatably connected to the inner wall of the installation box 11, and a motor 33 fixed to one end of the connecting column 32 is installed on the rear side of the installation box 11, and the rotating plate 31 is installed on the other end of the connecting column 32. There are two placement covers 34, and the two placement covers 34 are respectively installed on the top and bottom of one side of the rotating plate 31, and the two placement covers 34 are provided with a notch for the filter paper to extend out. There are two rotating shafts 35, and the two rotating shafts 35 are respectively arranged inside the placement cover 34 and rotatably connected to the rotating plate 31, and the rotating shaft 35 is coaxially arranged with the placement cover 34. One end of the rotating shaft 35 passes through the rotating plate 31 and extends to the outside of the rotating plate 31, and one end of the two rotating shafts 35 is installed with a gear 36. A second motor 38 is installed on the installation box 11 near the top of the first motor 33, and a second gear 37 for driving the first gear 36 to rotate is installed on the driving shaft of the second motor 38.

[0045] When in use, the motor 2 38 drives the gear 1 36 located above to rotate through the gear 2 37, and the gear 1 36 drives the filter paper roll located above to rotate through the rotating shaft 35 to release the filter paper. When the filter paper roll located above is completely released, the motor 1 33 drives the rotating plate 31 to rotate through the connecting column 32, and moves the unused filter paper roll to the top to continue releasing the filter paper.

[0046] When replacing, the sealing plug 14 is pulled out, and a new filter paper roll is loaded into the placement cover 34 and the end of the filter paper is extended from the notch of the placement cover 34.

[0047] like Figures 3 to 5 As shown, the folding mechanism 40 includes a mounting frame 41, a pressing plate 1 43, a pressing plate 2 44, a baffle 45, a folding assembly 1 46 and a folding assembly 2 47. The mounting frame 41 is mounted on the inner wall of the mounting box 11, and a guide plate 42 for guiding the filter paper into the mounting frame 41 is mounted on one side of the mounting frame 41 close to the rotating plate 31, and the other side of the mounting frame 41 is arranged close to the detector 25, and the inner bottom wall of the mounting frame 41 and the top of the detector 25 are located on the same horizontal plane. The guide plate 42 is arranged in the tangential direction of the upper cover 34, and the end of the guide plate 42 is located at the notch of the upper cover 34, so that the filter paper can fall onto the guide plate 42. Pressing plate 1 43 is slidably connected to the inner top wall of the mounting frame 41, a groove for accommodating pressing plate 1 43 is provided at the top of the mounting frame 41, pressing plate 2 44 is slidably connected to the inner bottom wall of the mounting frame 41, a groove for accommodating pressing plate 2 44 is provided at the bottom of the mounting frame 41, a baffle plate 45 is installed at the lower inside of the mounting frame 41, one side of the baffle plate 45 and one side of the outlet of the mounting frame 41 are located on the same horizontal plane to limit the connection of the filter paper and prevent the connection of the filter paper from being disconnected.

[0048] Folding component 1 46 is arranged on the inner bottom wall of the mounting frame 41 and close to one side of the pressing plate 1 43 to fold the head end of the unused filter paper, and folding component 2 47 is arranged on the inner top wall of the mounting frame 41 and close to one side of the pressing plate 2 44 to fold the end of the filter paper that is about to be used up.

[0049] When the filter paper is about to be used up, the pressing plate 2 44 moves up and presses the filter paper that is about to be used up against the inner top wall of the mounting frame 41, and then the folding component 2 47 folds the end of the filter paper that is about to be used up. When the head end of the unused filter paper enters the mounting frame 41, the pressing plate 1 43 presses the unused filter paper against the inner bottom wall of the mounting frame 41. At this time, the folding component 1 46 folds the head end of the unused filter paper. As the unused filter paper continues to move, the end of the filter paper that is about to be used up can hook the head end of the unused filter paper. At this time, the filter paper that is about to be used up can drive the unused filter paper to move to achieve the splicing of the filter paper.

[0050] like Figures 5 to 7As shown, the folding assembly 46 includes a folding plate 461, a sliding rod 462, a rotating shaft 463 and a pushing plate 464. The folding plate 461 is hinged on the inner bottom wall of the mounting frame 41. A groove for accommodating the folding plate 461 is provided on the inner bottom wall of the mounting frame 41. In the initial position, the top of the folding plate 461 and the inner bottom wall of the mounting frame 41 are located on the same horizontal plane. The sliding rod 462 is installed on one side of the folding plate 461. One end of the sliding rod 462 penetrates the mounting frame 41 and extends to the outside of the mounting frame 41. The rotating shaft 463 is rotatably connected to one side of the mounting frame 41. Two pushing plates 464 for pushing the sliding rod 462 to move are installed on the outer side of the rotating shaft 463. A transmission wheel 465 is installed on one end of the rotating shaft 463. A motor 49 fixed to one end of the transmission wheel 465 is installed on the mounting box 11.

[0051] Continue to refer Figures 5 to 7 As shown, the folding assembly 47 includes a folding plate 471, a sliding rod 472, a rotating shaft 473 and a push plate 474. The folding plate 471 is hinged on the inner top wall of the mounting frame 41. A groove for accommodating the folding plate 471 is provided on the inner top wall of the mounting frame 41. In the initial position, the bottom of the folding plate 471 and the inner top wall of the mounting frame 41 are located on the same horizontal plane. The sliding rod 472 is installed on one side of the folding plate 471. One end of the sliding rod 472 passes through the mounting frame 41 and extends to the outside of the mounting frame 41. Two guide grooves 48 are provided on one side of the mounting frame 41. The guide grooves 48 are semicircular in shape. The sliding rod 462 and the sliding rod 472 are respectively slidably connected in the two guide grooves 48. The rotating shaft 473 is rotatably connected to one side of the mounting frame 41. Two push plates 474 for pushing the sliding rod 472 to move are installed on the outer side of the rotating shaft 473.

[0052] A transmission wheel 2 475 is installed at one end of the rotating shaft 2 473. In the present embodiment, the transmission wheel 1 465 and the transmission wheel 2 475 are both pulleys, and the two are connected by a belt transmission. In other embodiments, the transmission wheel 1 465 and the transmission wheel 2 475 are both sprockets, and the two are connected by a chain transmission.

[0053] Motor 1 49 can drive transmission wheel 1 465 and transmission wheel 2 475 to rotate simultaneously. When transmission wheel 1 465 rotates, transmission wheel 1 465 can push slide bar 1 462 to move along the track of guide groove 48 through push plate 1 464 on rotating shaft 1 463, thereby driving folding plate 1 461 to flip over to fold the head end of the unused filter paper.

[0054] When the transmission wheel 475 rotates, the transmission wheel 475 can push the slide bar 472 to move along the track of the guide groove 48 through the push plate 474 on the rotating shaft 473, thereby driving the folding plate 471 to flip over to fold the end of the filter paper that is about to be used up.

[0055] like Figure 3 and Figure 8 As shown, the conveying mechanism 50 includes a connecting frame 51 and a pressure roller 52 rotatably connected to the connecting frame 51. One end of the pressure roller 52 passes through the connecting frame 51 and extends to the outside of the connecting frame 51. One end of the pressure roller 52 is installed with a motor 2 53, and the motor 2 53 is installed on the rear side of the installation box 11. One side of the inner wall of the installation box 11 is provided with a paper outlet connected to the collection box 12. One side of the connecting frame 51 is installed on one side of the inner wall of the installation box 11. One side of the connecting frame 51 corresponds to the paper outlet on the installation box 11. The other side of the connecting frame 51 is arranged close to the detector 25. The inner bottom wall of the connecting frame 51 and the top of the detector 25 are located on the same horizontal plane.

[0056] The second motor 53 can drive the pressing roller 52 to rotate. When the pressing roller 52 rotates, it can drive the used filter paper to move. At this time, the used filter paper enters the collection box 12 through the connecting frame 51 for storage.

[0057] like Figure 3 , Figure 5 and Fig. 9 As shown, the adjustment mechanism 60 includes a telescopic member 61 and a lifting plate 62. The telescopic member 61 is installed on one side of the top of the mounting frame 41, and the lifting plate 62 is installed at the telescopic end of the telescopic member 61. In this embodiment, the telescopic member 61 is a cylinder, and in other embodiments, the telescopic member 61 is an electric telescopic rod or a hydraulic cylinder, and one end of the lifting plate 62 passes through the fixed frame 23 and is installed on the radiator 24 to lift the radiator 24.

[0058] like Fig. 9 As shown, connecting rods 63 fixed to the bottom of the second pressure plate 44 are installed on both sides of the lifting plate 62, two connecting plates 64 are installed on the bottom of the lifting plate 62, a push rod 65 is installed between the two connecting plates 64, the top of the push rod 65 is movably connected to an adjusting plate 67, one side of the top of the adjusting plate 67 is movably connected to a mounting plate 68, both sides of the bottom of the mounting plate 68 are installed with fixing rods 69 fixed to the top of the pressure plate 1 43, two brackets 66 are installed on the top of the mounting frame 41, and the adjusting plate 67 is rotatably connected between the two brackets 66.

[0059] When the telescopic member 61 drives the lifting plate 62 to move upward, the lifting plate 62 lifts the radiator 24, and the lifting plate 62 drives the pressing plate 2 44 to move upward through the connecting rod 63 to press the filter paper that is about to be used. During the upward movement of the lifting plate 62, the lifting plate 62 can drive the adjusting plate 67 to rotate through the top rod 65 on the connecting plate 64. During the rotation of the adjusting plate 67, the mounting plate 68 moves downward, thereby causing the pressing plate 1 43 to move downward to press the unused filter paper.

[0060] Working principle: When the filter paper is about to be used up, the motor 1 33 drives the rotating plate 31 to rotate through the connecting column 32, and moves the unused filter paper roll to the top. Then the motor 2 38 drives the gear 1 36 located above to rotate through the gear 2 37. At this time, the gear 1 36 drives the filter paper roll located above to rotate through the rotating shaft 35, so that the end of the filter paper enters the installation frame 41 through the guidance of the guide plate 42.

[0061] Then the telescopic member 61 drives the lifting plate 62 to move up to lift the radiator 24, and at the same time the pressing plate 2 44 moves up and presses the filter paper that is about to be used up on the inner top wall of the installation frame 41, and the pressing plate 1 43 moves down and presses the unused filter paper on the inner bottom wall of the installation frame 41.

[0062] Then the motor 1 49 drives the transmission wheel 2 475 to rotate through the transmission wheel 1 465. At this time, the folding plate 1 461 folds the head end of the unused filter paper, and the folding plate 2 471 folds the end of the filter paper that is about to be used. Then the unused filter paper is moved to the bottom of the filter paper that is about to be used, so that the end of the filter paper that is about to be used can hook the head end of the unused filter paper to complete the splicing of the filter paper. Then the motor 2 53 drives the pressing roller 52 to rotate to drive the filter paper that is about to be used to move. At this time, the splicing of the two filter papers passes through the installation frame 41, the radiator 24 and the connecting frame 51 in turn and enters the collection box 12. At this time, the replacement of the filter paper is completed, and the installation box 11 does not need to be opened during the filter paper replacement process to prevent external dust and staff from polluting the filter paper and avoiding affecting the accuracy of dust concentration measurement.

[0063] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A device for measuring dust concentration, comprising a mounting mechanism (10) and a detection mechanism (20), characterized in that: An unwinding mechanism (30) for unwinding filter paper is provided on one side of the interior of the installation mechanism (10); a folding mechanism (40) for splicing filter paper is provided on one side of the unwinding mechanism (30); and a conveying mechanism (50) for moving used filter paper is installed on one side of the inner wall of the installation mechanism (10); The unwinding mechanism (30) comprises a rotating plate (31) rotatably connected to the mounting mechanism (10), two placement covers (34) distributed vertically on the rotating plate (31), and a rotating shaft (35) rotatably connected to the two placement covers (34); a notch is provided on the placement cover (34) for the end of the filter paper to extend out; The folding mechanism (40) comprises a mounting frame (41), a folding assembly 1 (46) and a folding assembly 2 (47); the mounting frame (41) is mounted inside the mounting mechanism (10) and arranged close to the detection mechanism (20); the folding assembly 1 (46) is arranged on one side of the inner bottom wall of the mounting frame (41) to fold the head end of the unused filter paper; the folding assembly 2 (47) is arranged on one side of the inner top wall of the mounting frame (41) to fold the tail end of the filter paper that is about to be used, so that the head end of the unused filter paper is connected to the tail end of the filter paper that is about to be used by a folding hook.

2. The device for measuring dust concentration according to claim 1, characterized in that: The installation mechanism (10) comprises an installation box (11) and a collection box (12) installed on one side of the installation box (11); a paper outlet is provided between the installation box (11) and the collection box (12); two box doors (13) are hingedly connected to the front side of the installation box (11); a filling hole for filling a filter paper roll is provided on the box door (13); and a sealing plug (14) is provided in the filling hole of the box door (13).

3. The device for measuring dust concentration according to claim 2, characterized in that: The installation frame (41) is installed on the inner wall of the installation box (11); a guide plate (42) is provided on the installation frame (41) for guiding the filter paper to enter the installation frame (41); a first pressing plate (43) and a second pressing plate (44) are slidably connected to the inner top wall and the inner bottom wall of the installation frame (41), respectively; and a baffle (45) is installed on one side of the interior of the installation frame (41).

4. The device for measuring dust concentration according to claim 1, characterized in that: The folding component (46) includes a folding plate (461), a sliding rod (462), a rotating shaft (463) and a pushing plate (464). The folding plate (461) is hinged on the inner bottom wall of the mounting frame (41) and is arranged on a side close to the pressure plate (43). The sliding rod (462) is installed on the folding plate (461). The rotating shaft (463) is rotatably connected to the mounting frame (41). Two pushing plates (464) for pushing the sliding rod (462) to move are installed on the outer side of the rotating shaft (463).

5. The device for measuring dust concentration according to claim 1, characterized in that: The folding component 2 (47) includes a folding plate 2 (471), a sliding rod 2 (472), a rotating shaft 2 (473) and a pushing plate 2 (474). The folding plate 2 (471) is hinged on the inner top wall of the mounting frame (41) and is arranged close to the side of the pressure plate 2 (44). The sliding rod 2 (472) is installed on the folding plate 2 (471). The rotating shaft 2 (473) is rotatably connected to the mounting frame (41). Two pushing plates 2 (474) for pushing the sliding rod 2 (472) to move are installed on the outer side of the rotating shaft 2 (473).

6. The device for measuring dust concentration according to claim 3, characterized in that: The conveying mechanism (50) comprises a connecting frame (51) and a pressing roller (52) rotatably connected to the connecting frame (51); one side of the connecting frame (51) is mounted on one side of an inner wall of the installation box (11); and one side of the connecting frame (51) corresponds to a paper outlet on the installation box (11).

7. The device for measuring dust concentration according to claim 6, characterized in that: The detection mechanism (20) comprises a heating tube (21), a connecting tube (22), a fixing frame (23), a radiator (24) and a detector (25); the connecting tube (22) is mounted on the inner top wall of the installation box (11); the fixing frame (23) is mounted on the inner wall of the installation box (11); the radiator (24) is slidably connected to the outer side of the connecting tube (22); a spring is installed between the fixing frame (23) and the radiator (24); and the bottom end of the radiator (24) is in contact with the top end of the detector (25).

8. The device for measuring dust concentration according to claim 7, characterized in that: An adjustment mechanism (60) is provided on the mounting frame (41), the adjustment mechanism (60) comprising a telescopic member (61) mounted on the top of the mounting frame (41) and a lifting plate (62) on the telescopic member (61), one end of the lifting plate (62) being mounted on the radiator (24) to lift the radiator (24).

9. The device for measuring dust concentration according to claim 8, characterized in that: Connecting rods (63) fixed to the second pressing plate (44) are installed on both sides of the lifting plate (62); two connecting plates (64) are installed at the bottom of the lifting plate (62); a push rod (65) is installed between the two connecting plates (64); an adjusting plate (67) is movably connected to the push rod (65); a mounting plate (68) is movably connected to the adjusting plate (67); a fixing rod (69) fixed to the first pressing plate (43) is installed on the mounting plate (68); and two brackets (66) rotatably connected to the adjusting plate (67) are installed on the top of the mounting frame (41).

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