Flue gas sampling device and control method

Abstract

The application discloses a flue gas sampling device and a control method. The flue gas sampling device comprises a main body pipe, a sampling pipe and a driving device. A first sampling channel is formed in the main body pipe. The sampling pipe is provided with a second sampling channel communicated with the first sampling channel and a plurality of sampling holes communicated with the second sampling channel. The sampling pipe is rotatably connected to the main body pipe and has a storage position and an unfolded position in the rotating direction. In the storage position, the sampling pipe is stored on one side of the main body pipe. In the unfolded position, the sampling pipe is arranged at an angle with the main body pipe. The driving device is used for driving the sampling pipe to move between the storage position and the unfolded position. According to the flue gas sampling device, the sampling pipe has the storage position and the unfolded position. In the storage position, the sampling pipe is stored on one side of the main body pipe, so that the space occupied by the flue gas sampling device can be reduced and the flue gas sampling device is convenient to carry. In the unfolded position, the sampling pipe is arranged at an angle with the main body pipe, so that the flue gas in the flue is convenient to sample.

Description

Technical Field

[0001] This invention relates to the field of flue gas sampling technology, and in particular to a flue gas sampling device and control method. Background Technology

[0002] In related technologies, grid-type flue gas sampling devices include multiple independent sampling tubes. During sampling, each flue gas sampling tube needs to be connected to a flue gas mixing device through a silicone hose for unified mixing and sampling. The installation and disassembly process is cumbersome, with large positioning errors and long equipment installation time. This not only increases the workload of operators but also reduces sampling efficiency. When carried, the device requires a lot of equipment and multiple independent sampling tubes, resulting in poor portability and equipment redundancy. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a flue gas sampling device, wherein the sampling tube has a storage position and an unfolded position. In the storage position, the sampling tube is stored on one side of the main tube, which can reduce the space occupied by the flue gas sampling device and facilitate carrying. In the unfolded position, the sampling tube is set at an angle to the main tube, which facilitates sampling of flue gas in the flue.

[0004] The present invention also proposes a control method having the above-described flue gas sampling device.

[0005] According to a first aspect of the present invention, a flue gas sampling device includes: a main tube having a first sampling channel formed therein; a sampling tube having a second sampling channel communicating with the first sampling channel, the sampling tube having a plurality of sampling holes communicating with the second sampling channel, the sampling tube being rotatably connected to the main tube, the sampling tube having a retracted position and an extended position in a rotational direction, wherein in the retracted position the sampling tube is retracted to one side of the main tube, and in the extended position the sampling tube is arranged at an angle to the main tube; and a driving device for driving the sampling tube to move between the retracted position and the extended position.

[0006] According to an embodiment of the present invention, the flue gas sampling device includes a driving device for driving the sampling tube to move between a retracted position and an extended position. In the retracted position, the sampling tube is retracted to one side of the main tube, which can reduce the volume space occupied by the flue gas sampling device and make it easy to carry. In the extended position, the sampling tube is set at an angle to the main tube, which facilitates sampling of flue gas in the flue.

[0007] According to some embodiments of the present invention, the flue gas sampling device further includes: a housing, the housing being sleeved on the outside of the main tube, the housing having a mounting cavity facing the sampling tube opening, wherein in the storage position, the sampling tube is stored in the mounting cavity through the opening.

[0008] According to some embodiments of the present invention, the driving device includes: a driving mechanism, a transmission assembly, a sleeve, and a connecting rod. The sleeve is sleeved on the outside of the main tube. One end of the sampling tube is rotatably connected to the main tube. Both ends of the connecting rod are rotatably connected to the sleeve wall and the sampling tube wall, respectively. The driving mechanism drives the sleeve to move along the length direction of the main tube through the transmission assembly.

[0009] According to some embodiments of the present invention, the transmission assembly further includes: a gear and a gear rack, the gear rack being connected to the sleeve, the gear meshing with the gear rack, and the drive mechanism driving the gear to rotate.

[0010] According to some embodiments of the present invention, the flue gas sampling device further includes: an adjustment mark and a locking device, the adjustment mark including a first mark and a second mark, the first mark being disposed on the gear rack, the second mark being disposed on the main body tube, the first mark and the second mark coinciding, the sampling tube being located in the unfolded position, and in the unfolded position, the locking device locking the gear rack.

[0011] According to some embodiments of the present invention, a plurality of sampling tubes are provided along the length direction of the main tube, and the plurality of sampling tubes are spaced apart along the length direction of the main tube. A plurality of sleeves are provided, and the plurality of sleeves are connected to the sampling tubes in a one-to-one correspondence.

[0012] According to some embodiments of the present invention, the driving device further includes: a regulating valve having multiple positions, and multiple transmission components being provided, with each of the multiple transmission components being connected to the sleeve in a one-to-one correspondence, and each position being adapted to control the driving mechanism to be connected to the corresponding transmission component.

[0013] According to some embodiments of the present invention, a plurality of sampling tubes are connected circumferentially to the main tube.

[0014] According to some embodiments of the present invention, the flue gas sampling device further includes a corrugated pipe, which is elastically connected between the main body pipe and the sampling pipe.

[0015] A control method for a flue gas sampling device according to a second aspect of the present invention is used in the flue gas sampling device according to the first aspect of the present invention. The control method includes: the sampling tube is located in the storage position, and the flue gas sampling device is controlled to be inserted into the flue; the sampling tube is controlled to rotate to the unfolded position, and the flue gas in the flue is adapted to be transported through the second sampling channel and the first sampling channel; the flue gas of the flue gas sampling device is collected; the sampling tube is controlled to rotate to the storage position, and the flue gas sampling device is removed from the flue.

[0016] According to the control method of the flue gas sampling device of the present invention, by setting the flue gas sampling device as described above, in the storage position, the sampling tube is stored on one side of the main tube, which can reduce the volume space occupied by the flue gas sampling device and make it easy to carry; in the unfolded position, the sampling tube is set at an angle to the main tube, which facilitates the sampling of flue gas in the flue, making the method of sampling flue gas simpler and more convenient.

[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a schematic diagram of the sampling tube of the flue gas sampling device according to the first embodiment of the present invention in the storage position;

[0020] Figure 2 yes Figure 1 A schematic diagram of the sampling tube of the flue gas sampling device in the deployed position;

[0021] Figure 3 yes Figure 1 A partial schematic diagram of the flue gas sampling device in the middle;

[0022] Figure 4 yes Figure 1 A schematic diagram of the regulating valve in the diagram;

[0023] Figure 5 yes Figure 4 Side view of the regulating valve in the image.

[0024] Figure label:

[0025] 100. Flue gas sampling device;

[0026] 10. Main tube; 11. Sampling interface;

[0027] 20. Sampling tube; 21. Sampling hole;

[0028] 30. Outer shell; 31. Mounting cavity; 32. Handle;

[0029] 40. Drive unit; 41. Sleeve; 42. Connecting rod; 43. Adjustment mark; 44. Locking device; 45. Adjusting valve; 451. First gear; 452. Second gear. Detailed Implementation

[0030] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0031] The following is for reference. Figures 1-3 A flue gas sampling device 100 according to an embodiment of the present invention is described.

[0032] According to a first aspect embodiment of the present invention, the flue gas sampling device 100 includes a main tube 10 and a sampling tube 20. The sampling tube 20 is rotatably connected to the main tube 10. A first sampling channel is formed inside the main tube 10, and a second sampling channel is formed in the sampling tube 20 that communicates with the first sampling channel. The sampling tube 20 is provided with a plurality of sampling holes 21 that communicate with the second sampling channel. When the flue gas sampling device 100 is placed in a flue, the flue gas in the flue can be transported from the sampling holes 21 to the second sampling channel, and then transported to the first sampling channel through the second sampling channel. After that, it is collected through the sampling interface 11 at one end of the main tube 10.

[0033] Multiple sampling holes 21 are set on the sampling tube 20 to collect flue gas from multiple locations in the flue. By collecting and analyzing the flue gas from multiple locations, the composition of the flue gas in the entire flue can be measured.

[0034] The flue gas sampling device 100 also includes a driving device 40. The sampling tube 20 has a retracted position and an extended position in the rotation direction. In the retracted position, the sampling tube 20 is retracted to one side of the main tube 10 and is arranged side by side with the main tube 10. In the extended position, the sampling tube 20 is arranged at an angle to the main tube 10, for example, the angle between the sampling tube 20 and the main tube 10 is 90°. The driving device 40 is used to drive the sampling tube 20 to move between the retracted position and the extended position, so as to realize the retraction and extension of the sampling tube 20.

[0035] In the storage position, the sampling tube 20 is stored on one side of the main tube 10, which can reduce the volume space occupied by the flue gas sampling device 100 and make it easy to carry. When the flue gas sampling device 100 is placed in the flue, the storage position of the sampling tube 20 moves to the unfolded position, and the sampling tube 20 can be arranged in the flue to facilitate sampling of the flue gas in the flue.

[0036] For example, after the flue gas sampling device 100 is placed inside the flue, the gap between the sampling point and the flue gas sampling device 100 is blocked with a rag to maintain airtightness.

[0037] According to an embodiment of the present invention, the flue gas sampling device 100 includes a driving device 40 for driving the sampling tube 20 to move between a retracted position and an extended position. In the retracted position, the sampling tube 20 is retracted to one side of the main tube 10, which can reduce the volume space occupied by the flue gas sampling device 100 and make it easy to carry. In the extended position, the sampling tube 20 is set at an angle to the main tube 10, which facilitates sampling of flue gas in the flue.

[0038] According to some embodiments of the present invention, with reference to Figures 1-2 The flue gas sampling device 100 also includes a housing 30, which is fitted over the outside of the main body tube 10. The housing 30 has a mounting cavity 31 that opens toward the sampling tube 20. In the retracted position, the sampling tube 20 is stored in the mounting cavity 31 through the opening. The housing 30 can protect the main body tube 10 and the sampling tube 20. The housing 30 also provides mounting space for the sampling tube 20 in the retracted position. In the retracted position, the sampling tube 20 is stored in the mounting cavity 31, which can prevent the sampling tube 20 from protruding from the flue gas sampling device 100 and can prevent the sampling tube 20 from being scratched.

[0039] For example, a handle 32 is provided at one end of the outer casing 30. The handle 32 is rotatably connected to the outer casing 30. When the handle 32 is unfolded, the flue gas sampling device 100 can be carried through the handle 32, which facilitates the carrying of the flue gas sampling device 100.

[0040] According to some embodiments of the present invention, with reference to Figures 2-3 The driving device 40 includes a driving mechanism, a transmission assembly, a sleeve 41, and a connecting rod 42. The sleeve 41 is sleeved on the outside of the main tube 10. One end of the sampling tube 20 is rotatably connected to the main tube 10. The two ends of the connecting rod 42 are rotatably connected to the sleeve wall and the sampling tube wall, respectively. The driving mechanism drives the sleeve 41 to move along the length direction of the main tube 10 through the transmission assembly.

[0041] When the drive mechanism drives the transmission assembly, the transmission assembly pushes the sleeve 41 to move along the length direction of the main tube 10. When the sleeve 41 moves along the length direction of the main tube 10, it pushes the connecting rod 42 to move along the length direction of the main tube 10, thereby driving the sampling tube 20 to rotate around the main tube 10 to reach the unfolded position.

[0042] For example, the drive mechanism can be a drive motor, or it can be an external device.

[0043] According to some embodiments of the present invention, with reference to Figures 2-3 The transmission assembly also includes a gear and a rack, with the rack connected to the sleeve 41 and meshing with it. The drive mechanism drives the gear to rotate, and the rotation of the gear causes the rack to rotate synchronously, thereby pushing the sleeve 41 to move along the length of the main tube 10.

[0044] According to some embodiments of the present invention, with reference to Figures 2-3 The flue gas sampling device 100 also includes an adjustment mark 43 and a locking device 44. The adjustment mark 43 includes a first mark and a second mark. The first mark is located on the gear rack, and the second mark is located on the main tube 10. The first mark and the second mark coincide, and the sampling tube 20 is in the unfolded position, that is, the sampling tube 20 has reached the position where sampling is required. The dashed circle in the attached figure represents the control system of the drive device.

[0045] For example, the first mark is the first marking line on the gear rack, and the second mark is the second marking line on the main tube 10. When the first marking line and the second marking line coincide, the sampling tube 20 reaches the unfolded position and the drive mechanism stops working.

[0046] In the unfolded position, the locking device 44 locks the gear rack, stopping its movement and securing the sampling tube 20 in the unfolded position. For example, the locking device 44 includes a locking rod that can pass through openings in the gear rack and the main tube 10 to prevent the gear rack from continuing to move. When it is necessary to store the sampling tube 20, the locking rod can be removed, allowing the gear rack to continue moving.

[0047] According to some embodiments of the present invention, with reference to Figures 1-2 Along the length of the main tube 10, multiple sampling tubes 20 are provided, spaced apart. These multiple sampling tubes 20 further increase the sampling range of the flue, expand the sampling points within the flue, and further improve the accuracy of the flue gas analysis values. Multiple sleeves 41 are provided, each corresponding to a sampling tube 20. These sleeves 41 are connected to the same transmission assembly, which can drive four sleeves 41 to move along the length of the main tube 10, thereby driving the four sampling tubes 20 to move synchronously.

[0048] For example, four spaced-apart sampling tubes 20 are provided along the length of the main tube 10, and four sleeves 41 are provided. Each sampling tube 20 is connected to a sleeve 41. The four sleeves 41 are connected to the same gear rack. The drive mechanism drives the gear rack to move, and the gear rack can drive the four sleeves 41 to move along the length of the main tube 10, thereby driving the four sampling tubes 20 to move synchronously.

[0049] According to some embodiments of the present invention, with reference to Figures 1-5 The drive device 40 also includes: a regulating valve 45, which has multiple positions and multiple transmission components. Each transmission component is connected to the sleeve 41 in a one-to-one correspondence. Each position is suitable for controlling the drive mechanism to be connected to the corresponding transmission component. The number of sampling tubes 20 that can be deployed can be selected according to the size of the flue. If the flue is long enough, all sampling tubes 20 can be deployed. If the flue is short, only a portion of the sampling tubes 20 can be deployed, so that the flue gas sampling device 100 can be adapted to flues of various sizes.

[0050] In a specific example, the regulating valve 45 can be a rotating disk installed in the driving device 40. The rotating disk is connected to the driving mechanism. When the rotating disk rotates, it can drive the driving mechanism to rotate, so as to connect with the corresponding transmission component and drive the corresponding transmission component to move, thereby driving the corresponding sleeve 41 and sampling tube 20 to move, so that the corresponding sampling tube 20 moves to the unfolded position.

[0051] Along the length of the main tube 10, there are four spaced-apart sampling tubes 20, namely the first sampling tube, the second sampling tube, the third sampling tube and the fourth sampling tube, with the first sampling tube located adjacent to the sampling interface; the regulating valve 45 has two positions, namely the first position 451 and the second position 452, and the driving device 40 includes a limiting device connected to the second position 452. The limiting device is used to limit whether the first sampling tube and the second sampling tube are opened or closed synchronously.

[0052] The number of sampling tubes 20 to be deployed is selected based on the length of the flue measuring point. If the flue measuring point is short, the first gear 451 and the second gear 452 are rotated simultaneously. Rotating the first gear 451 disconnects the first sampling tube group from the connecting rod 42, so that the first sampling tube is not controlled by the drive device 40 and remains in the retracted state. Rotating the second gear 452 closes the connection between the second sampling tube and the connecting rod 42, so that the second sampling tube is not controlled by the drive device 40 and remains in the retracted state. That is, rotating the first gear 451 and the second gear 452 simultaneously causes the drive device 40 to drive only the third and fourth sampling tubes to the deployed position, thus addressing flues with short measuring points.

[0053] If the length of the flue measuring point is long, keep the first gear 451 and the second gear 452 unchanged, and the drive device 40 controls the first sampling tube, the second sampling tube, the third sampling tube and the fourth sampling tube to unfold to the unfolded position at the same time.

[0054] If the length of the flue measuring point is normal, rotate the first gear 451, the limiting device controls the first sampling tube to remain in the storage position, and the driving device 40 drives the second, third and fourth sampling tubes to unfold to the unfolded position at the same time.

[0055] According to some embodiments of the present invention, with reference to Figures 1-5 Multiple sampling tubes 20 are connected circumferentially to the main tube 10. The multiple sampling tubes 20 can further increase the sampling range of the flue, expand the sampling points in the flue, and further improve the accuracy of the analysis value of the flue gas in the flue.

[0056] Multiple sampling tubes 20 are connected in the circumferential direction of the main tube 10, and multiple sampling tubes 20 are provided in the length direction of the main tube 10. In the unfolded position, multiple sampling holes 21 on multiple sampling tubes 20 form a grid arrangement, which solves the problems of low sampling efficiency, large positioning error, long equipment installation time and poor portability of the traditional grid method.

[0057] Multiple sampling tubes 20 located in the circumferential direction of the main tube 10 are all connected to the same sleeve 41. Multiple sampling tubes 20 connected to the same sleeve 41 can be simultaneously unfolded or stored.

[0058] For example, two sampling tubes 20 are connected circumferentially to the main tube 10, and the two sampling tubes 20 are arranged symmetrically. Eight sampling tubes 20 are arranged on the flue gas sampling device 100, which are arranged in sequence as the first sampling tube group, the second sampling tube group, the third sampling tube group, and the fourth sampling tube group. The first sampling tube group is located adjacent to the sampling interface. The regulating valve 45 has two regulating positions, namely the first position 451 and the second position 452. The driving device 40 includes a limiting device, which is connected to the second position 452. The limiting device is used to limit whether the first sampling tube group and the second sampling tube group are opened or closed synchronously.

[0059] The number of sampling tubes 20 to be deployed is selected based on the length of the flue measuring point. If the flue measuring point is short, the first gear 451 and the second gear 452 are rotated simultaneously. The first gear 451 is used to disconnect the first sampling tube group from the connecting rod 42, so that the first sampling tube group is not controlled by the drive device 40 and remains in the retracted state. The second gear 452 is used to disconnect the second sampling tube group from the connecting rod 42, so that the second sampling tube group is not controlled by the drive device 40 and remains in the retracted state. That is, by rotating the first gear 451 and the second gear 452 simultaneously, the drive device 40 only drives the third and fourth sampling tube groups to the deployed position, thus dealing with flues with short measuring points.

[0060] If the length of the flue measuring point is long, keep the first gear 451 and the second gear 452 unchanged, so that the driving device 40 can simultaneously drive the first sampling tube group, the second sampling tube group, the third sampling tube group and the fourth sampling tube group to the unfolded position.

[0061] If the length of the flue at the flue measuring point is average, rotate the first gear 451 so that the first sampling tube group is no longer controlled by the drive device 40. The limiting device controls the first sampling tube group to remain in the storage position, and the drive device 40 drives the second, third, and fourth sampling tube groups to unfold to the unfolded position simultaneously.

[0062] According to some embodiments of the present invention, with reference to Figures 1-2 The flue gas sampling device 100 also includes a bellows, which is elastically connected between the main tube 10 and the sampling tube 20, so that the sampling tube 20 can rotate relative to the main tube 10.

[0063] For example, the bellows can be made of fluororubber, which can withstand high temperatures. A metal sealing ring can also be installed between the main tube 10 and the sampling tube 20 to compensate for deformation and improve the sealing performance between the sampling tube 20 and the main tube 10.

[0064] A control method for a flue gas sampling device 100 according to a second aspect embodiment of the present invention is used for the flue gas sampling device 100 according to the first aspect embodiment of the present invention. The control method includes:

[0065] Adjust the setting of regulating valve 45 according to the size of the flue.

[0066] The sampling tube 20 is in the storage position, and the flue gas sampling device 100 is inserted into the flue.

[0067] The sampling tube 20 is rotated to the unfolded position, and the drive mechanism drives the transmission component to move, thereby driving the sleeve 41 to move. When the sleeve 41 moves, it pushes the sampling tube 20 to unfold by 90° through the connecting rod 42. The flue gas in the flue is suitable to be transported to the sampling interface 11 through the second sampling channel and the first sampling channel.

[0068] The flue gas collected by the flue gas sampling device 100 is collected through the sampling interface 11.

[0069] The sampling tube 20 is rotated to the storage position, and the drive mechanism drives the transmission component to move, thereby moving the sleeve 41. When the sleeve 41 moves, it drives the sampling tube 20 to the storage position through the connecting rod 42, thereby reducing the volume of the flue gas sampling device 100 and making it easier to remove the flue gas sampling device 100 from the flue.

[0070] According to the control method of the flue gas sampling device 100 of the present invention, by setting the flue gas sampling device 100 such that, in the storage position, the sampling tube 20 is stored on one side of the main tube 10, which can reduce the volume space occupied by the flue gas sampling device 100 and make it easy to carry; in the unfolded position, the sampling tube 20 is set at an angle to the main tube 10, which facilitates the sampling of flue gas in the flue, making the method of sampling flue gas simpler and more convenient.

[0071] In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0072] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0073] In the description of this specification, references to terms such as "some embodiments," "optionally," "furthermore," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0074] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A flue gas sampling device (100), characterized in that, include: The main tube (10) has a first sampling channel formed inside it; A sampling tube (20) is formed with a second sampling channel communicating with the first sampling channel. The sampling tube (20) is provided with a plurality of sampling holes (21) communicating with the second sampling channel. The sampling tube (20) is rotatably connected to the main body tube (10). The sampling tube (20) has a retracted position and an extended position in the rotation direction. In the retracted position, the sampling tube (20) is retracted to one side of the main body tube (10). In the extended position, the sampling tube (20) is set at an angle to the main body tube (10). A driving device (40) is used to drive the sampling tube (20) to move between the storage position and the unfolded position; The driving device (40) includes: a driving mechanism, a transmission assembly, a sleeve (41) and a connecting rod (42). The sleeve (41) is sleeved on the outside of the main tube (10). One end of the sampling tube (20) is rotatably connected to the main tube (10). The two ends of the connecting rod (42) are rotatably connected to the wall of the sleeve (41) and the wall of the sampling tube (20) respectively. The driving mechanism drives the sleeve (41) to move along the length direction of the main tube (10) through the transmission assembly. Along the length of the main tube (10), there are multiple sampling tubes (20), and the multiple sampling tubes (20) are spaced apart along the length of the main tube (10). There are multiple sleeves (41), and the multiple sleeves (41) are connected to the sampling tubes (20) one by one. The drive device (40) further includes: a regulating valve (45) having multiple positions, and multiple transmission components being provided. Each transmission component is connected to the sleeve (41) in a one-to-one correspondence. Each position can control the drive mechanism to be connected to the corresponding transmission component, and select the number of sampling tubes to be deployed according to the size of the flue.

2. The flue gas sampling device (100) according to claim 1, characterized in that, Also includes: The outer shell (30) is sleeved on the outside of the main tube (10). The outer shell (30) has a mounting cavity (31) that opens toward the sampling tube (20). In the storage position, the sampling tube (20) is stored in the mounting cavity (31) through the opening.

3. The flue gas sampling device (100) according to claim 1, characterized in that, A plurality of sampling tubes (20) are connected circumferentially to the main tube (10).

4. The flue gas sampling device (100) according to claim 1, characterized in that, Also includes: A corrugated pipe is elastically connected between the main tube (10) and the sampling tube (20).

5. A control method for a flue gas sampling device (100), characterized in that, Using the flue gas sampling device (100) according to any one of claims 1-4, the control method includes: The sampling tube (20) is located in the storage position, and the flue gas sampling device (100) is controlled to be inserted into the flue; Control the sampling tube (20) to rotate to the unfolded position, and the flue gas in the flue is transported through the second sampling channel and the first sampling channel; Collect the flue gas from the flue gas sampling device (100); Control the sampling tube (20) to rotate to the storage position, and remove the flue gas sampling device (100) from the flue.

Images