A high-temperature flue gas dioxin sampling device and sampling method

Abstract

The present invention discloses a high-temperature flue gas dioxin sampling device and sampling method, belonging to the technical field of combustion flue gas sampling. A high-temperature flue gas dioxin sampling device comprises a box body, the inner cavity of the box body is fixedly connected to a partition, the outer side of the partition is provided with a through hole, and one side of the partition is fixedly connected to a smoke collection box, the inner cavity of the smoke collection box is provided with a filter assembly, and the smoke collection box is provided with an air outlet on the side close to the partition. The high-temperature flue gas dioxin sampling device, by providing a filter assembly, enables the device to filter the collected high-temperature flue gas through a filter net and a filter membrane when sampling dioxins, collect smoke dust in the high-temperature flue gas, and prevent smoke dust from clogging the sampling tube and the sampling system. At the same time, the present application uses water cooling to cool the high-temperature flue gas to protect the sampling device.

Description

Technical Field

[0001] The invention relates to the technical field of combustion flue gas sampling, and more specifically to a high-temperature flue gas dioxin sampling device and a sampling method. Background Art

[0002] Dioxins are mainly derived from the incineration of municipal solid waste. Even with the most advanced equipment and incineration technology, the generation of dioxins is unavoidable. Therefore, before discharging the waste gas from the waste incinerator, the dioxins and other toxic substances therein must be treated. This requires that a dioxin sampling device capable of withstanding high temperatures be provided when incinerating waste. Since the waste gas from the waste incinerator may be mixed with some impurities, the existing dioxin sampling device cannot filter the impurities in the waste gas during use, which results in the subsequent treatment of the dioxins and other toxic substances therein. The sampling and treatment effect of the dioxins is reduced due to the impurities. Based on this, the present invention designs a high-temperature flue gas dioxin sampling device and a sampling method to solve the above problems. Summary of the invention

[0003] The object of the present invention is to provide a high-temperature flue gas dioxin sampling device and sampling method to solve the problems raised in the above background technology.

[0004] A high-temperature flue gas dioxin sampling device comprises a box body, the inner cavity of the box body is fixedly connected to a partition, the outer side of the partition is provided with a through hole, and a dust box is fixedly connected to one side of the partition, the inner cavity of the dust box is provided with a filter assembly, and the side of the dust box close to the partition is provided with an air outlet, the side of the partition away from the dust box is provided with a serpentine tube, one end of the serpentine tube is connected to the dust box through the air outlet, and the other end of the serpentine tube passes through the box body and is fixedly connected to the outlet pipe, the side of the dust box away from the partition is provided with an air inlet, and the dust box is connected to an air guide pipe through the air inlet, a closing assembly is provided on the outer side of the air guide pipe, the closing assembly passes through the box body and is connected to the filter assembly, the end of the air guide pipe away from the dust box is rotatably connected to the air inlet pipe, a conversion assembly is provided on the outer side of the air inlet pipe, the conversion assembly is respectively connected to the box body and the closing assembly, and two spring plates are provided on the outer side of the box body, and the two spring plates are both in contact with the air inlet pipe.

[0005] Preferably, the filter assembly includes a fixed sleeve fixedly connected to the inner cavity of the dust removal box, the inner cavity of the fixed sleeve is provided with a spring, one end of the spring is fixedly connected to the fixed sleeve, and the other end of the spring is fixedly connected to a limiting plate, the outer side of the limiting plate is fixedly connected with a movable rod, the movable rod passes through the fixed sleeve and is fixedly connected to a connecting frame, the inner cavity of the connecting frame is fixedly connected with a filter net, and a driving assembly is provided on the outer side of the connecting frame.

[0006] Preferably, the driving assembly includes a mounting plate fixedly connected to the outside of the box body, a motor is fixedly mounted on the outside of the mounting plate, a connecting rod is fixedly connected to the output shaft of the motor, the outside of the connecting rod is rotatably connected to a connecting seat, the connecting seat is fixedly connected to the partition, the end of the connecting rod away from the motor passes through the dust removal box and is fixedly connected to a rotating rod, the rotating rod is rotatably connected to the inner wall of the dust removal box, and a cam is fixedly connected to the outside of the rotating rod, and the cam abuts against the connecting frame.

[0007] Preferably, the closing assembly includes a mounting seat fixedly connected to the outside of the dust removal box, the outside of the mounting seat is rotatably connected to a driving rod, one end of the driving rod passes through the air guide pipe and is fixedly connected to a valve plate, the diameter of the valve plate matches the inner diameter of the air guide pipe, the end of the driving rod away from the valve plate passes through the box body and is fixedly connected to full gear 2, a transmission assembly is provided on one side of the full gear 2, and a full gear 1 is meshed with the other side of the full gear 2, the outside of the full gear 1 is fixedly connected to a mounting shaft, the mounting shaft is rotatably connected to the box body, and the outside of the mounting shaft is fixedly connected to a spring 1, the end of the spring 1 away from the mounting shaft is fixedly connected to a mounting disk 1, the outside of the mounting disk 1 is fixedly connected to a mounting rod, and the mounting rod is fixedly connected to the box body.

[0008] Preferably, the transmission assembly includes a connecting shaft rotatably connected to the outside of the box body, the end of the connecting shaft away from the box body is fixedly connected to a broken gear, the broken gear is meshed with full gear 2, the outside of the connecting shaft is fixedly connected to a driven wheel 1, the outside of the driven wheel 1 is sleeved with a belt 1, and the driven wheel 1 is connected to a driving wheel 1 through the belt 1, and the driving wheel 1 is fixedly connected to a connecting rod.

[0009] Preferably, the conversion assembly includes a fixed rod fixedly connected to the outside of the intake pipe, and a chamfer fixedly connected to the two ends of the inner wall of the intake pipe, the outside of the fixed rod is fixedly connected to a driven wheel 2, the outside of the driven wheel 2 is sleeved with a belt 2, and the driven wheel 2 is connected to a driving wheel 2 through the belt 2, and the driving wheel 2 is fixedly connected to the driving rod, a movable part is provided on the inner side of the chamfer, the outside of the movable part is fixedly connected to a threaded sleeve, the inner cavity of the threaded sleeve is threadedly connected to a threaded rod, a linkage assembly is provided between the two threaded rods, and the thread directions of the two threaded rods are opposite, the outside of the threaded sleeve is fixedly connected to a limiting groove, the inner cavity of the limiting groove is slidably connected to a limiting block, and the limiting block is fixedly connected to the inner wall of the intake pipe.

[0010] Preferably, the linkage assembly includes a bearing seat fixedly connected to the inner wall of the intake pipe, the outer side of the bearing seat is rotatably connected to a driving shaft, both ends of the driving shaft are respectively fixedly connected to two threaded rods, and the outer side of the driving shaft is fixedly connected to a driven bevel gear, the outer side of the driven bevel gear is meshed with an active bevel gear, the outer side of the active bevel gear is fixedly connected to a cross bar, the cross bar passes through the intake pipe and is rotatably connected to the inner wall of the box, and the outer side of the cross bar is fixedly connected to a second spring, the end of the second spring away from the cross bar is fixedly connected to a second mounting disk, and the second mounting disk is fixedly connected to the inner wall of the box.

[0011] Preferably, a water inlet and a water outlet are provided on the outer side of the box body.

[0012] Preferably, the outer sides of the box body and the dust removal box are rotatably connected with door panel one and door panel two respectively.

[0013] A high-temperature flue gas dioxin sampling method, the steps of which are as follows:

[0014] S1, first, control the motor to work, so that the motor drives the connecting rod with its output shaft to rotate, and when the connecting rod rotates, it drives the rotating rod to rotate, so that the rotating rod drives the cam to rotate, and then the connecting frame drives the filter to move up and down continuously, so as to facilitate the shaking off of the debris attached to the filter;

[0015] S2, when the connecting rod rotates, it will drive the driving wheel 1 to rotate, so that the connecting shaft drives the residual gear to rotate. At this time, the residual gear will mesh with the full gear 2, so that the driving rod drives the valve plate to flip. When the intake pipe is flipped, the driving rod will flip due to the elastic force of the spring 1, so that the valve plate will flip to the initial position;

[0016] S3, when the driving rod rotates, it will drive the second driving wheel to rotate, so that the fixed rod drives the intake pipe to flip. When the intake pipe flips, the driven cone wheel will rotate under the action of the active cone wheel, so that the movable part contacts the groove to close the intake pipe. After the intake pipe flips 90°, the threaded rod will drive the two threaded sleeves to approach each other under the action of the thread, so that the movable part is separated from the groove, preventing water in the inner cavity of the box from entering the inner cavity of the intake pipe.

[0017] Compared with the prior art, the advantages of the present invention are:

[0018] 1) In the present invention, by setting a filter assembly, the device can filter the collected high-temperature flue gas through the filter when sampling dioxins, thereby avoiding the presence of impurities in the collected flue gas, which leads to a reduction in the sampling effect of dioxins. At the same time, the device can also control the cam to rotate continuously, so that the connection frame continuously drives the filter to shake, thereby avoiding the clogging of the filter by impurities and improving the filtering effect of the device.

[0019] 2) In the present invention, by setting a sealing component, the device can automatically control the rotation of the second gear when the air intake pipe is flipped, so that the device can automatically close the air duct to prevent the water in the box body from flowing into the inner cavity of the air duct, thereby reducing the sampling effect of the device. At the same time, the device can automatically control the valve plate to return to its original position after the air intake pipe is flipped, so as to facilitate the device to continue sampling.

[0020] 3) In the present invention, by providing a conversion component, the device can automatically flip and cool the air inlet pipe when sampling dioxins, thereby preventing the air inlet pipe from being continuously exposed to high temperature, which would reduce the sampling effect of the device. At the same time, the device can also automatically control the contact between the movable part and the groove, thereby preventing the water in the inner cavity of the box from flowing into the air inlet pipe during the flipping process. Moreover, after the flipping is completed, the device can control the groove to separate from the movable part, thereby facilitating the continued use of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a cross-sectional view of the box structure of the present invention;

[0023] Figure 3 It is a schematic diagram of the partition structure of the present invention;

[0024] Figure 4 For the present invention Figure 3 A magnified view of the structure at center;

[0025] Figure 5 For the present invention Figure 3 A magnified view of the structure at B in the middle;

[0026] Figure 6 It is a schematic diagram of the structure of the dust removal box of the present invention;

[0027] Figure 7 A cross-sectional view of the dust removal box structure of the present invention;

[0028] Figure 8 It is a cross-sectional view of the fixed sleeve structure of the present invention;

[0029] Fig. 9 It is a cross-sectional view of the air guide tube structure of the present invention;

[0030] Fig.10 It is a cross-sectional view of the air intake pipe structure of the present invention.

[0031] Explanation of the reference numerals in the figure: 1. box body; 2. partition; 3. through hole; 4. dust box; 5. filter assembly; 51. fixed sleeve; 52. spring; 53. limit plate; 54. movable rod; 55. connecting frame; 56. filter screen; 57. mounting plate; 58. motor; 59. connecting rod; 510. connecting seat; 511. rotating rod; 512. cam; 6. air guide tube; 7. closing assembly; 71. mounting seat; 72. driving rod; 73. valve plate; 74. full gear one; 75. mounting shaft; 76. spring one; 77. mounting plate one; 78. mounting rod; 79. residual gear; 710. driven wheel one; 711. belt one; 712. driving wheel one; 713. Full gear 2; 714. Connecting shaft; 8. Air inlet pipe; 9. Conversion assembly; 91. Fixed rod; 92. Threaded rod; 93. Driven wheel 2; 94. Belt 2; 95. Driving wheel 2; 96. Threaded sleeve; 97. Movable part; 98. Bevel; 99. Limiting groove; 910. Limiting block; 911. Mounting plate 2; 912. Spring 2; 913. Crossbar; 914. Driving cone wheel; 915. Driven cone wheel; 916. Driving shaft; 917. Bearing seat; 10. Spring plate; 11. Air inlet; 12. Air outlet; 13. Serpentine pipe; 14. Air outlet pipe; 15. Water inlet; 16. Water outlet; 17. Door panel 1; 18. Door panel 2. DETAILED DESCRIPTION

[0032] Example: See Figure 1-10 A high-temperature flue gas dioxin sampling device comprises a box body 1, the inner cavity of the box body 1 is fixedly connected with a partition 2, the outer side of the partition 2 is provided with a through hole 3, and a dust removal box 4 is fixedly connected to one side of the partition 2, the inner cavity of the dust removal box 4 is provided with a filter assembly 5, and the side of the dust removal box 4 close to the partition 2 is provided with an air outlet 12, the side of the partition 2 away from the dust removal box 4 is provided with a serpentine tube 13, one end of the serpentine tube 13 is connected to the dust removal box 4 through the air outlet 12, and the other end of the serpentine tube 13 passes through the box body 1 and is fixedly connected with an air outlet pipe 14, the side of the dust removal box 4 away from the partition 2 is provided with an air inlet 11, and the dust removal box 4 is connected to an air guide pipe 6 through the air inlet 11, and the outer side of the air guide pipe 6 A closing component 7 is provided on the side, and the closing component 7 passes through the box body 1 and is connected to the filter component 5. The end of the air guide pipe 6 away from the dust removal box 4 is rotatably connected to the air intake pipe 8. A conversion component 9 is provided on the outside of the air intake pipe 8, and the conversion component 9 is respectively connected to the box body 1 and the closing component 7. Two spring plates 10 are provided on the outside of the box body 1, and the two spring plates 10 are both in contact with the air intake pipe 8. In order to facilitate the cooling of the high-temperature gas in the inner cavity of the box body 1, a water inlet 15 and a water outlet 16 are opened on the outside of the box body 1. In addition, in order to facilitate the cleaning of debris in the inner cavity of the dust removal box 4, the outer sides of the box body 1 and the dust removal box 4 are respectively rotatably connected with a door panel 17 and a door panel 2 18.

[0033] The filter assembly 5 includes a fixed sleeve 51 fixedly connected to the inner cavity of the dust removal box 4, the inner cavity of the fixed sleeve 51 is provided with a spring 52, one end of the spring 52 is fixedly connected to the fixed sleeve 51, and the other end of the spring 52 is fixedly connected to a limit plate 53, the outer side of the limit plate 53 is fixedly connected to a movable rod 54, the movable rod 54 passes through the fixed sleeve 51 and is fixedly connected to a connecting frame 55, the inner cavity of the connecting frame 55 is fixedly connected to a filter screen 56, and the outer side of the connecting frame 55 is provided with a driving assembly, the driving assembly includes a fixed connection to The mounting plate 57 on the outside of the box body 1, the outer side of the mounting plate 57 is fixedly mounted with a motor 58, the output shaft of the motor 58 is fixedly connected with a connecting rod 59, the outer side of the connecting rod 59 is rotatably connected with a connecting seat 510, the connecting seat 510 is fixedly connected to the partition 2, the end of the connecting rod 59 away from the motor 58 passes through the dust removal box 4 and is fixedly connected with a rotating rod 511, the rotating rod 511 is rotatably connected to the inner wall of the dust removal box 4, and the outer side of the rotating rod 511 is fixedly connected with a cam 512, and the cam 512 abuts against the connecting frame 55.

[0034] By providing the filter assembly 5, the device can filter the collected high-temperature flue gas through the filter 56 when sampling dioxins, thereby preventing the collected flue gas from containing foreign matter, which would reduce the sampling effect of dioxins. At the same time, the device can also control the cam 512 to rotate continuously, so that the connection frame 55 continuously drives the filter 56 to shake, thereby preventing foreign matter from clogging the filter 56 and improving the filtering effect of the device.

[0035] The closure assembly 7 includes a mounting seat 71 fixedly connected to the outside of the dust removal box 4, and a driving rod 72 is rotatably connected to the outside of the mounting seat 71. One end of the driving rod 72 passes through the air duct 6 and is fixedly connected to a valve plate 73. The diameter of the valve plate 73 matches the inner diameter of the air duct 6. The end of the driving rod 72 away from the valve plate 73 passes through the box body 1 and is fixedly connected to a full gear 2 713. A transmission assembly is provided on one side of the full gear 2 713, and a full gear 1 74 is meshed on the other side of the full gear 2 713. A mounting shaft 75 is fixedly connected to the outside of the full gear 1 74. The mounting shaft 75 is rotatably connected to the box body 1, and a spring 1 76 is fixedly connected to the outside of the mounting shaft 75. The end of the mainspring 76 away from the mounting shaft 75 is fixedly connected to a mounting disk 77, the outer side of the mounting disk 77 is fixedly connected to a mounting rod 78, the mounting rod 78 is fixedly connected to the box body 1, the transmission assembly includes a connecting shaft 714 rotatably connected to the outer side of the box body 1, the end of the connecting shaft 714 away from the box body 1 is fixedly connected to a residual gear 79, the residual gear 79 is meshed with a full gear 2 713, the outer side of the connecting shaft 714 is fixedly connected to a driven wheel 710, the outer side of the driven wheel 710 is sleeved with a belt 711, and the driven wheel 710 is connected to a driving wheel 712 through the belt 711, and the driving wheel 712 is fixedly connected to the connecting rod 59.

[0036] By setting up the closing component 7, the device can automatically control the rotation of the full gear 2 713 when the air inlet pipe 8 is flipped, so that the device can automatically close the air duct 6 to prevent water from flowing into the inner cavity of the box 1 to the inner cavity of the air duct 6, thereby reducing the sampling effect of the device. At the same time, the device can automatically control the valve plate 73 to return to its original position after the air inlet pipe 8 is flipped, so that the device can continue sampling.

[0037] The conversion assembly 9 includes a fixed rod 91 fixedly connected to the outside of the intake pipe 8, and a groove 98 fixedly connected to the two ends of the inner wall of the intake pipe 8, the outside of the fixed rod 91 is fixedly connected to a driven wheel 2 93, the outside of the driven wheel 2 93 is sleeved with a belt 2 94, and the driven wheel 2 93 is connected to a driving wheel 2 95 through the belt 2 94, and the driving wheel 2 95 is fixedly connected to the driving rod 72, and a movable part 97 is provided on the inner side of the groove 98, and a threaded sleeve 96 is fixedly connected to the outside of the movable part 97, and the inner cavity of the threaded sleeve 96 is threadedly connected to a threaded rod 92, a linkage assembly is provided between the two threaded rods 92, and the thread directions of the two threaded rods 92 are opposite, the outer side of the threaded sleeve 96 is fixedly connected to a limiting groove 99, and the inner cavity of the limiting groove 99 is slidably connected to a limiting block 910, the limit block 910 is fixedly connected to the inner wall of the intake pipe 8, and the linkage assembly includes a bearing seat 917 fixedly connected to the inner wall of the intake pipe 8, and the outer side of the bearing seat 917 is rotatably connected with a drive shaft 916, and the two ends of the drive shaft 916 are respectively fixedly connected to the two threaded rods 92, and the outer side of the drive shaft 916 is fixedly connected with a driven bevel gear 915, and the outer side of the driven bevel gear 915 is meshed with a driving bevel gear 914, and the outer side of the driving bevel gear 914 is fixedly connected with a cross bar 913, and the cross bar 913 penetrates the intake pipe 8 and is rotatably connected to the inner wall of the box body 1, and the outer side of the cross bar 913 is fixedly connected with a spring 2 912, and the end of the spring 2 912 away from the cross bar 913 is fixedly connected with a mounting plate 2 911, and the mounting plate 2 911 is fixedly connected to the inner wall of the box body 1.

[0038] By providing the conversion assembly 9, the device can automatically flip and cool the air inlet pipe 8 when sampling dioxins, thereby preventing the air inlet pipe 8 from being continuously exposed to high temperature, which may reduce the sampling effect of the device. At the same time, the device can also automatically control the movable part 97 to contact the groove 98, thereby preventing water in the inner cavity of the box body 1 from flowing into the air inlet pipe 8 during the flipping process. Moreover, after the flipping is completed, the device can control the groove 98 to separate from the movable part 97, thereby facilitating the continued use of the device.

[0039] Working principle of the present invention:

[0040] First, the motor 58 is controlled to work so that the motor 58 drives the connecting rod 59 fixedly connected to its output shaft to rotate. When the connecting rod 59 rotates, it drives the rotating rod 511 fixedly connected to it to rotate, so that the rotating rod 511 drives the cam 512 fixedly connected to it to rotate. When the protruding end of the cam 512 contacts the connecting frame 55, the cam 512 pushes the connecting frame 55 upward, so that the connecting frame 55 drives the movable rod 54 fixedly connected to it to move upward. When the movable rod 54 moves, it drives the limit plate 53 fixedly connected to it to move synchronously, so that the limit plate 53 stretches the spring 52 fixedly connected to it. When the protruding end of the cam 512 is separated from the connecting frame 55, the connecting frame 55 moves downward due to the elastic force of the spring 52, so that the connecting frame 55 drives the filter screen 56 fixedly connected to it to move up and down continuously, thereby facilitating the shaking off of the debris attached to the filter screen 56.

[0041] When the connecting rod 59 rotates, it will drive the driving wheel 1 712 fixedly connected thereto to rotate, so that the driving wheel 1 712 drives the driven wheel 1 710 to rotate through the belt 1 711. When the driven wheel 1 710 rotates, it will drive the connecting shaft 714 fixedly connected thereto to rotate, so that the connecting shaft 714 drives the residual gear 79 fixedly connected thereto to rotate. At this time, the residual gear 79 will mesh with the full gear 2 713, so that the full gear 2 713 drives the driving rod 72 fixedly connected thereto to rotate. When the driving rod 72 rotates, it will drive the valve plate 73 fixedly connected thereto to flip over, thereby closing the air guide pipe 6. When the air intake pipe 8 is flipped over, the residual gear 79 will be disengaged from the full gear 2 713. At this time, the driving rod 72 will flip over due to the elastic force of the spring 1 76, thereby flipping the valve plate 73 to the initial position.

[0042] When the driving rod 72 rotates, it will drive the driving wheel 2 95 fixedly connected thereto to rotate, so that the driving wheel 2 95 drives the driven wheel 2 93 to rotate through the belt 2 94. When the driven wheel 2 93 rotates, it will drive the fixed rod 91 fixedly connected thereto to rotate, so that the fixed rod 91 drives the intake pipe 8 to flip over. When the intake pipe 8 flips over, the driven cone wheel 915 will rotate under the action of the driving cone wheel 914, so that the driven cone wheel 915 drives the driving shaft 916 fixedly connected thereto to rotate. When the driving shaft 916 rotates, it will drive the two threaded rods 92 fixedly connected thereto to rotate, so that the threaded rod 92 drives the threaded sleeves 96 threadedly connected thereto to move toward each other, so that the movable part 97 contacts the groove 98 to close the intake pipe 8. After the intake pipe 8 flips over 90°, the threaded rod 92 will drive the two threaded sleeves 96 to approach each other under the action of the thread, so that the movable part 97 is separated from the groove 98, preventing water in the inner cavity of the box body 1 from entering the inner cavity of the intake pipe 8.

[0043] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A high-temperature flue gas dioxin sampling device, comprising a housing (1), characterized in that: The inner cavity of the box body (1) is fixedly connected to a partition (2), the outer side of the partition (2) is provided with a through hole (3), and one side of the partition (2) is fixedly connected to a dust removal box (4), the inner cavity of the dust removal box (4) is provided with a filter assembly (5), and the side of the dust removal box (4) close to the partition (2) is provided with an air outlet (12), and the side of the partition (2) away from the dust removal box (4) is provided with a serpentine tube (13), one end of the serpentine tube (13) is connected to the dust removal box (4) through the air outlet (12), and the other end of the serpentine tube (13) passes through the box body (1) and is fixedly connected to the air outlet pipe (14), and the dust removal box (4) away from the partition (2) is provided with a serpentine tube (13). ) is provided with an air inlet (11) on one side, and the dust removal box (4) is connected to an air guide pipe (6) through the air inlet (11); a sealing component (7) is provided on the outside of the air guide pipe (6); the sealing component (7) penetrates the box body (1) and is connected to the filter component (5); an end of the air guide pipe (6) away from the dust removal box (4) is rotatably connected to an air inlet pipe (8); a conversion component (9) is provided on the outside of the air inlet pipe (8); the conversion component (9) is respectively connected to the box body (1) and the sealing component (7); two spring plates (10) are provided on the outside of the box body (1); the two spring plates (10) are both in contact with the air inlet pipe (8); The conversion assembly (9) comprises a fixing rod (91) fixedly connected to the outside of the air intake pipe (8), and grooves (98) fixedly connected to the two ends of the inner wall of the air intake pipe (8), the outside of the fixing rod (91) is fixedly connected to a driven wheel (93), the outside of the driven wheel (93) is sleeved with a belt (94), and the driven wheel (93) is connected to a driving wheel (95) via the belt (94), the driving wheel (95) is fixedly connected to the driving rod (72), and the inner side of the groove (98) is provided with a A movable part (97), wherein the outer side of the movable part (97) is fixedly connected to a threaded sleeve (96), the inner cavity of the threaded sleeve (96) is threadedly connected to a threaded rod (92), a linkage assembly is provided between the two threaded rods (92), and the threads of the two threaded rods (92) are in opposite directions, the outer side of the threaded sleeve (96) is fixedly connected to a limiting groove (99), the inner cavity of the limiting groove (99) is slidably connected to a limiting block (910), and the limiting block (910) is fixedly connected to the inner wall of the intake pipe (8); The linkage assembly comprises a bearing seat (917) fixedly connected to the inner wall of the air intake pipe (8); the outer side of the bearing seat (917) is rotatably connected to a drive shaft (916); the two ends of the drive shaft (916) are respectively fixedly connected to two threaded rods (92); the outer side of the drive shaft (916) is fixedly connected to a driven cone wheel (915); the outer side of the driven cone wheel (915) is meshed with a driving cone wheel (914); the outer side of the driving cone wheel (914) is fixedly connected to a cross bar (913); the cross bar (913) passes through the air intake pipe (8) and is rotatably connected to the inner wall of the box body (1); the outer side of the cross bar (913) is fixedly connected to a second spring (912); the end of the second spring (912) away from the cross bar (913) is fixedly connected to a second mounting plate (911); the second mounting plate (911) is fixedly connected to the inner wall of the box body (1).

2. A high-temperature flue gas dioxin sampling device according to claim 1, characterized in that: The filter assembly (5) comprises a fixed sleeve (51) fixedly connected to the inner cavity of the dust removal box (4); the inner cavity of the fixed sleeve (51) is provided with a spring (52); one end of the spring (52) is fixedly connected to the fixed sleeve (51), and the other end of the spring (52) is fixedly connected to a limit plate (53); the outer side of the limit plate (53) is fixedly connected to a movable rod (54); the movable rod (54) passes through the fixed sleeve (51) and is fixedly connected to a connecting frame (55); the inner cavity of the connecting frame (55) is fixedly connected to a filter screen (56), and the outer side of the connecting frame (55) is provided with a driving assembly.

3. A high-temperature flue gas dioxin sampling device according to claim 2, characterized in that: The driving assembly comprises a mounting plate (57) fixedly connected to the outside of the box body (1); a motor (58) is fixedly mounted on the outside of the mounting plate (57); a connecting rod (59) is fixedly connected to the output shaft of the motor (58); a connecting seat (510) is rotatably connected to the outside of the connecting rod (59); the connecting seat (510) is fixedly connected to the partition (2); an end of the connecting rod (59) away from the motor (58) passes through the dust removal box (4) and is fixedly connected to a rotating rod (511); the rotating rod (511) is rotatably connected to the inner wall of the dust removal box (4); and a cam (512) is fixedly connected to the outside of the rotating rod (511); the cam (512) abuts against the connecting frame (55).

4. A high-temperature flue gas dioxin sampling device according to claim 3, characterized in that: The sealing assembly (7) comprises a mounting seat (71) fixedly connected to the outside of the dust removal box (4); the outside of the mounting seat (71) is rotatably connected to a driving rod (72); one end of the driving rod (72) passes through the air guide tube (6) and is fixedly connected to a valve plate (73); the diameter of the valve plate (73) matches the inner diameter of the air guide tube (6); one end of the driving rod (72) away from the valve plate (73) passes through the box body (1) and is fixedly connected to a full gear 2 (713); a transmission group is provided on one side of the full gear 2 (713). The second full gear (713) is meshed with a full gear (74) on the other side; the outer side of the full gear (74) is fixedly connected to a mounting shaft (75); the mounting shaft (75) is rotationally connected to the housing (1); the outer side of the mounting shaft (75) is fixedly connected to a spring (76); one end of the spring (76) away from the mounting shaft (75) is fixedly connected to a mounting plate (77); the outer side of the mounting plate (77) is fixedly connected to a mounting rod (78); the mounting rod (78) is fixedly connected to the housing (1).

5. A high-temperature flue gas dioxin sampling device according to claim 4, characterized in that: The transmission assembly comprises a connecting shaft (714) rotatably connected to the outside of the housing (1); an end of the connecting shaft (714) away from the housing (1) is fixedly connected to a residual gear (79); the residual gear (79) is meshed with a full gear 2 (713); a driven wheel 1 (710) is fixedly connected to the outside of the connecting shaft (714); a belt 1 (711) is sleeved on the outside of the driven wheel 1 (710); the driven wheel 1 (710) is connected to a driving wheel 1 (712) via the belt 1 (711); and the driving wheel 1 (712) is fixedly connected to the connecting rod (59).

6. A high-temperature flue gas dioxin sampling device according to claim 1, characterized in that: A water inlet (15) and a water outlet (16) are provided on the outer side of the box body (1).

7. A high-temperature flue gas dioxin sampling device according to claim 1, characterized in that: The outer sides of the box body (1) and the dust removal box (4) are rotatably connected to a first door panel (17) and a second door panel (18) respectively.

8. A high-temperature flue gas dioxin sampling method, applied to a high-temperature flue gas dioxin sampling device according to claim 5, the steps of which are as follows: S1, first, the motor (58) is controlled to work, so that the motor (58) drives the connecting rod (59) connected to its output shaft to rotate, and when the connecting rod (59) rotates, it drives the rotating rod (511) to rotate, so that the rotating rod (511) drives the cam (512) to rotate, and then the connecting frame (55) drives the filter screen (56) to move up and down continuously, so as to facilitate shaking off of debris attached to the filter screen (56); S2, when the connecting rod (59) rotates, it drives the driving wheel 1 (712) to rotate, so that the connecting shaft (714) drives the residual gear (79) to rotate. At this time, the residual gear (79) will mesh with the full gear 2 (713), so that the driving rod (72) drives the valve plate (73) to flip. When the air intake pipe (8) is flipped, the driving rod (72) will flip due to the elastic force of the spring 1 (76), so that the valve plate (73) is flipped to the initial position; S3, when the driving rod (72) rotates, it drives the second driving wheel (95) to rotate, so that the fixed rod (91) drives the air intake pipe (8) to turn over. When the air intake pipe (8) turns over, the driven cone wheel (915) rotates under the action of the driving cone wheel (914), so that the movable member (97) contacts the groove (98) to close the air intake pipe (8). When the air intake pipe (8) turns over by 90 degrees, the threaded rod (92) drives the two threaded sleeves (96) to approach each other under the action of the thread, so that the movable member (97) and the groove (98) are separated, thereby preventing water in the inner cavity of the box body (1) from entering the inner cavity of the air intake pipe (8).

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