Flue gas sampling device and control method

Abstract

The invention 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, and a first sampling channel is formed in the main body pipe; a second sampling channel communicated with the first sampling channel is formed in the sampling tube, a plurality of sampling holes communicated with the second sampling channel are formed in the sampling tube, the sampling tube is rotatably connected to the main body tube, the sampling tube has a storage position and an unfolding position in the rotating direction, the sampling tube is stored on one side of the main body tube in the storage position, and the sampling tube is unfolded in the unfolding position. An included angle is formed between the sampling tube and the main tube; the driving device is used for driving the sampling tube to move between the storage position and the unfolding position. According to the flue gas sampling device, the sampling pipe has the storage position and the unfolding position, and the sampling pipe is stored on one side of the main body pipe at the storage position, so that the space occupied by the flue gas sampling device can be reduced, and the flue gas sampling device is convenient to carry; at the unfolding position, the sampling pipe and the main body pipe are arranged at an included angle, so that the flue gas in the flue can be conveniently sampled.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flue gas sampling, and in particular to a flue gas sampling device and a control method. BACKGROUND

[0002] In the related art, a net-shaped flue gas sampling device includes multiple independent sampling tubes. During sampling, each flue gas sampling tube needs to be connected to a flue gas mixing device through a silica gel hose for unified mixing and sampling. The installation and dismounting process is complicated, the positioning error is large, and the equipment installation takes a long time, which not only increases the working strength of the operator, but also reduces the sampling efficiency. When carrying, multiple independent sampling tubes are needed, which has poor portability and equipment redundancy. SUMMARY

[0003] The present application aims to solve at least one of the technical problems in the prior art. To this end, one object of the present application is to provide a flue gas sampling device. 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 arranged at an angle with the main tube, which facilitates sampling of the flue gas in the flue.

[0004] The present application also provides a control method for the flue gas sampling device.

[0005] According to the flue gas sampling device of the first aspect of the present application, the main tube has a first sampling channel formed therein. The sampling tube has a second sampling channel in communication with the first sampling channel. The sampling tube is provided with multiple sampling holes in communication with the second sampling channel. The sampling tube is rotatably connected to the main tube. The sampling tube has a storage position and an unfolded position in the rotation direction. In the storage position, the sampling tube is stored on one side of the main tube. In the unfolded position, the sampling tube is arranged at an angle with the main tube. The driving device is used to drive the sampling tube to move between the storage position and the unfolded position.

[0006] According to the flue gas sampling device of the present application, the driving device is used to drive the sampling tube to move between the storage position and the unfolded position. 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 facilitate carrying. In the unfolded position, the sampling tube is arranged at an angle with the main tube, which facilitates sampling of the flue gas in the flue.

[0007] According to some embodiments of the present application, the flue gas sampling device further comprises a housing, which is sleeved on the outside of the main tube. The housing has a mounting cavity opening towards the sampling tube. In the storage position, the sampling tube is stored in the mounting cavity through the opening.

[0008] According to some embodiments of the present application, the driving device comprises a driving mechanism, a transmission assembly, a sleeve and a connecting rod, the sleeve is sleeved outside the main pipe, one end of the sampling pipe is rotatably connected to the main pipe, two ends of the connecting rod are rotatably connected to a cylinder wall of the sleeve and a pipe wall of the sampling pipe respectively, and the driving mechanism drives the sleeve to move along the length direction of the main pipe through the transmission assembly.

[0009] According to some embodiments of the present application, the transmission assembly further comprises a gear and a gear strip, the gear strip is connected to the sleeve, the gear is engaged with the gear strip, and the driving mechanism drives the gear to rotate.

[0010] According to some embodiments of the present application, the flue gas sampling device further comprises an adjusting mark and a locking device, the adjusting mark comprises a first mark and a second mark, the first mark is arranged on the gear strip, the second mark is arranged on the main pipe, the first mark and the second mark are coincided, and the sampling pipe is located at the unfolded position, in which the locking device locks the gear strip.

[0011] According to some embodiments of the present application, a plurality of sampling pipes are arranged along the length direction of the main pipe, and a plurality of sleeves are arranged corresponding to the sampling pipes.

[0012] According to some embodiments of the present application, the driving device further comprises an adjusting valve having a plurality of gears, a plurality of transmission assemblies are arranged corresponding to the sleeves, and each gear is adapted to control the driving mechanism and the corresponding transmission assembly.

[0013] According to some embodiments of the present application, a plurality of sampling pipes are arranged in the circumferential direction of the main pipe.

[0014] According to some embodiments of the present application, the flue gas sampling device further comprises a bellows elastically connected between the main pipe and the sampling pipe.

[0015] The control method of the flue gas sampling device according to the second aspect of the present application is used for the flue gas sampling device according to the first aspect of the present application, and the control method comprises the following steps: the sampling pipe is located at the storage position, the flue gas sampling device is inserted into the flue; the sampling pipe is controlled to rotate to the unfolded position, the flue gas in the flue is suitable for being conveyed through the second sampling channel and the first sampling channel; the flue gas of the flue gas sampling device is collected; and the sampling pipe is controlled to rotate to the storage position, and the flue gas sampling device is removed from the flue.

[0016] The control method of the flue gas sampling device according to the second aspect of the present application is used for the flue gas sampling device according to the first aspect of the present application, and the control method comprises the following steps: the sampling pipe is located at the storage position, the flue gas sampling device is inserted into the flue; the sampling pipe is controlled to rotate to the unfolded position, the flue gas in the flue is suitable for being conveyed through the second sampling channel and the first sampling channel; the flue gas of the flue gas sampling device is collected; and the sampling pipe is controlled to rotate to the storage position, and the flue gas sampling device is removed from the flue.

[0017] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

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

[0019] Figure 1 is a schematic view of a sampling pipe of the flue gas sampling device according to the first embodiment of the present application in the storage position;

[0020] Figure 2 is a schematic view of the flue gas sampling device in Figure 1 in the unfolded position;

[0021] Figure 3 is a schematic view of the flue gas sampling device in Figure 1 ;

[0022] Figure 4 is a schematic view of the adjusting valve in Figure 1 ;

[0023] Figure 5 is a side view of the adjusting valve in Figure 4 ;

[0024] LIST OF REFERENCE NUMERALS

[0025] 100, flue gas sampling device;

[0026] 10, main pipe; 11, sampling interface;

[0027] 20, sampling pipe; 21, sampling hole;

[0028] 30, housing; 31, mounting cavity; 32, handle;

[0029] 40, driving device; 41, sleeve; 42, connecting rod; 43, adjustment mark; 44, locking device; 45, adjustment valve; 451, first gear position; 452, second gear position. DETAILED DESCRIPTION

[0030] Embodiments of the present application are described in detail below with reference to the accompanying drawings, wherein the same or like elements or elements having the same or similar functions are denoted by the same or like reference signs throughout the drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0031] Reference is made below to Figures 1-3 A flue gas sampling device 100 according to an embodiment of the present application is described below.

[0032] The flue gas sampling device 100 according to the first embodiment of the present application comprises a main tube 10 and a sampling tube 20, the sampling tube 20 is rotatably connected to the main tube 10, the main tube 10 is formed with a first sampling channel, the sampling tube 20 is formed with a second sampling channel in communication with the first sampling channel, the sampling tube 20 is provided with a plurality of sampling holes 21 in communication with the second sampling channel, the flue gas sampling device 100 is placed into a flue, flue gas in the flue can be transported from the sampling holes 21 into the second sampling channel, and then transported into the first sampling channel through the second sampling channel, and then collected through a sampling interface 11 at one end of the main tube 10.

[0033] The plurality of sampling holes 21 provided on the sampling tube 20 can collect flue gas at a plurality of positions in the flue, and by collecting and analyzing the flue gas at the plurality of positions, the composition of the flue gas in the entire flue can be measured.

[0034] The flue gas sampling device 100 further comprises a driving device 40, the sampling tube 20 has a storage position and an unfolded position in the rotation direction, in the storage position, the sampling tube 20 is stored at one side of the main tube 10, and the sampling tube 20 is arranged side by side with the main tube 10; in the unfolded position, the sampling tube 20 is arranged at an angle with 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 storage position and the unfolded position, and the storage and unfolding of the sampling tube 20 can be realized.

[0035] In the storage position, the sampling tube 20 is stored at one side of the main tube 10, which can reduce the volume space occupied by the flue gas sampling device 100 and facilitate carrying. When the flue gas sampling device 100 is placed in the flue, the sampling tube 20 is moved from the storage position to the unfolded position, and the sampling tube 20 can be arranged in the flue, thereby facilitating sampling of the flue gas in the flue.

[0036] For example, after the flue gas sampling device 100 is placed in the flue, the sampling point and the gap of the flue gas sampling device 100 are blocked with a cloth to maintain the sealing property.

[0037] According to the flue gas sampling device 100 of the embodiment of the present application, the driving device 40 is used to drive the sampling tube 20 to move between the storage position and the unfolded position. In the storage position, the sampling tube 20 is stored at one side of the main tube 10, which can reduce the volume space occupied by the flue gas sampling device 100 and facilitate carrying. In the unfolded position, the sampling tube 20 is arranged at an angle with the main tube 10, thereby facilitating sampling of the flue gas in the flue.

[0038] According to some embodiments of the present application, referring to Figures 1-2 The flue gas sampling device 100 further comprises a housing 30, which is sleeved on the outer side of the main tube 10. The housing 30 has a mounting cavity 31 which is open towards the sampling tube 20. In the storage position, the sampling tube 20 is stored in the mounting cavity 31 through the opening. The housing 30 can be used to protect the main tube 10 and the sampling tube 20. The housing 30 also provides mounting space for the sampling tube 20 in the storage position. In the storage position, the sampling tube 20 is stored in the mounting cavity 31, which can avoid the sampling tube 20 protruding from the flue gas sampling device 100 and can avoid scratching of the sampling tube 20.

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

[0040] According to some embodiments of the present application, referring to Figures 2-3 The driving device 40 comprises a driving mechanism, a transmission assembly, a sleeve 41 and a connecting rod 42. The sleeve 41 is sleeved on the outer side of the main tube 10. One end of the sampling tube 20 is rotatably connected to the main tube 10. The connecting rod 42 is rotatably connected to the tube wall of the sleeve 41 and the tube wall of the sampling tube 20 at two ends. 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 driving mechanism drives the transmission assembly, the transmission assembly drives the sleeve 41 to move along the length direction of the main pipe 10, and when the sleeve 41 moves along the length direction of the main pipe 10, the sleeve 41 drives the connecting rod 42 to move along the length direction of the main pipe 10, and then drives the sampling pipe 20 to rotate around the main pipe 10 to reach the unfolded position.

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

[0043] According to some embodiments of the present application, referring to Figures 2-3 , the transmission assembly further comprises a gear and a gear strip, the gear strip is connected to the sleeve 41, and the gear is engaged with the gear strip. The driving mechanism drives the gear to rotate, and the gear drives the gear strip to rotate synchronously when the gear rotates, and then the sleeve 41 can be driven to move along the length direction of the main pipe 10.

[0044] According to some embodiments of the present application, referring to Figures 2-3 , the flue gas sampling device 100 further comprises an adjusting mark 43 and a locking device 44, the adjusting mark 43 comprises a first mark and a second mark, the first mark is arranged on the gear strip, and the second mark is arranged on the main pipe 10, the first mark and the second mark coincide, and the sampling pipe 20 is located at the unfolded position, that is, the sampling pipe 20 reaches the position where sampling is required. The dashed line in the figure is the control system of the driving device.

[0045] For example, the first mark is a first mark line on the gear strip, and the second mark is a second mark line arranged on the main pipe 10, and when the first mark line and the second mark line coincide, the sampling pipe 20 reaches the unfolded position, and the driving mechanism stops working.

[0046] In the unfolded position, the locking device 44 locks the gear strip, and the gear strip stops moving, for locking the sampling pipe 20 in the unfolded position. For example, the locking device 44 comprises a locking rod, the locking rod can be arranged in the hole on the gear strip and the main pipe 10, to avoid the gear strip from continuing to move, and when it is required to store the sampling pipe 20, the locking rod can be removed, so that the gear strip can continue to move.

[0047] According to some embodiments of the present application, referring to Figures 1-2 , a plurality of sampling pipes 20 are arranged along the length direction of the main pipe 10, and the plurality of sampling pipes 20 are arranged at intervals along the length direction of the main pipe 10, and the plurality of sampling pipes 20 can further increase the sampling range of the flue, expand the position points of the flue that can be sampled, and further improve the accuracy of the analysis value of the flue gas in the flue. A plurality of sleeves 41 are arranged, the plurality of sleeves 41 are connected to the sampling pipes 20 one by one, and the plurality of sleeves 41 are connected to the same transmission assembly, and the transmission assembly can drive the four sleeves 41 to move along the length direction of the main pipe 10, and then drive the four sampling pipes 20 to move synchronously.

[0048] For example, four sampling tubes 20 are arranged at intervals in the length direction of the main tube 10, and four sleeves 41 are arranged, one sleeve 41 being connected to each sampling tube 20, and the four sleeves 41 are connected to the same gear strip, the driving mechanism drives the gear strip to move, and the gear strip can drive the four sleeves 41 to move in the length direction of the main tube 10, and in turn drive the four sampling tubes 20 to move synchronously.

[0049] According to some embodiments of the present application, with reference to Figures 1-5 The driving device 40 further comprises an adjusting valve 45 having a plurality of gears, and a plurality of transmission assemblies are arranged, one transmission assembly corresponding to one sleeve 41, and each gear is adapted to control the driving mechanism to be connected to the corresponding transmission assembly, so that the number of sampling tubes 20 to be unfolded can be selected according to the size of the flue, and the flue length is long enough to select all the sampling tubes 20 to be unfolded, and the flue length is short to select part of the sampling tubes 20 to be unfolded, so that the flue gas sampling device 100 is adapted to flues of various sizes.

[0050] In a specific example, the adjusting valve 45 can be a rotating disc arranged in the driving device 40, the rotating disc is connected to the driving mechanism, and when the rotating disc rotates, it can drive the driving mechanism to rotate to be connected to the corresponding transmission assembly, for driving the corresponding transmission assembly to move, and in turn driving the corresponding sleeve 41 and sampling tube 20 to move, so that the corresponding sampling tube 20 moves to the unfolded position.

[0051] Four sampling tubes 20 are arranged at intervals in the length direction of the main tube 10, in order of a first sampling tube, a second sampling tube, a third sampling tube and a fourth sampling tube, and the first sampling tube is arranged adjacent to the sampling interface; the adjusting valve 45 has two gears, a first gear 451 and a second gear 452, and the driving device 40 comprises a limiting device connected to the second gear 452, and the limiting device is used to limit whether the first sampling tube and the second sampling tube are unfolded or closed synchronously.

[0052] The number of sampling tubes 20 to be unfolded is selected according to the length of the flue measuring point position, and when the length of the flue measuring point position is short, the first gear 451 and the second gear 452 are rotated simultaneously, the rotation of the first gear 451 is used to release the connection between the first sampling tube group and the connecting rod 42, so that the first sampling tube is not controlled by the driving device 40 and always remains in the storage state, and the rotation of the second gear 452 is used to close the connection between the second sampling tube and the connecting rod 42, so that the second sampling tube is not controlled by the driving device 40 and always remains in the storage state. That is, the first gear 451 and the second gear 452 are rotated simultaneously, so that the driving device 40 only drives the third sampling tube and the fourth sampling tube to the unfolded position, thereby coping with flues with short flue measuring point positions.

[0053] If the length of the flue measuring point position is long, the first gear 451 and the second gear 452 remain unchanged, and the driving device 40 controls the first sampling pipe, the second sampling pipe, the third sampling pipe and the fourth sampling pipe to be expanded to the expanded position at the same time.

[0054] If the length of the flue measuring point position is general, the first gear 451 is rotated, the limiting device controls the first sampling pipe to remain in the storage position, and the driving device 40 drives the second sampling pipe, the third sampling pipe and the fourth sampling pipe to be expanded to the expanded position at the same time.

[0055] According to some embodiments of the present application, referring to Figures 1-5 A plurality of sampling pipes 20 are connected in the circumferential direction of the main pipe 10, which can further increase the sampling range of the flue, expand the position points that can be sampled by the flue, and further improve the accuracy of the analysis value of the flue gas in the flue.

[0056] A plurality of sampling pipes 20 are connected in the circumferential direction of the main pipe 10, and in the length direction of the main pipe 10, the sampling pipes 20 are provided with a plurality of sampling holes 21, which form a grid arrangement in the expanded position, solving the problems of low sampling efficiency, large positioning error, long equipment installation time and poor portability of the traditional grid method.

[0057] The plurality of sampling pipes 20 located in the circumferential direction of the main pipe 10 are connected to the same sleeve 41, and the plurality of sampling pipes 20 connected to the same sleeve 41 can be expanded or stored at the same time.

[0058] For example, two sampling pipes 20 are connected in the circumferential direction of the main pipe 10, and the two sampling pipes 20 are arranged symmetrically, eight sampling pipes 20 are arranged on the flue gas sampling device 100, which are sequentially arranged as a first sampling pipe group, a second sampling pipe group, a third sampling pipe group and a fourth sampling pipe group, and the first sampling pipe group is arranged adjacent to the sampling interface. The regulating valve 45 is provided with two regulating gears, which are a first gear 451 and a second gear 452, and the driving device 40 includes a limiting device connected to the second gear 452, which is used to limit whether the first sampling pipe group and the second sampling pipe group are expanded or closed at the same time.

[0059] According to the length of the flue measuring point position, the number of the sampling tubes 20 to be unfolded is selected. If the length of the flue measuring point position is short, the first stop 451 and the second stop 452 are simultaneously rotated. The first stop 451 is used to release the connection between the first sampling tube group and the connecting rod 42, so that the first sampling tube group is not controlled by the driving device 40 and is always kept in the storage state. The second stop 452 is used to release the connection between the second sampling tube group and the connecting rod 42, so that the second sampling tube group is not controlled by the driving device 40 and is always kept in the storage state. That is, the first stop 451 and the second stop 452 are simultaneously rotated, so that the driving device 40 only drives the third sampling tube group and the fourth sampling tube group to the unfolded position, thereby coping with the flue with a short flue measuring point position.

[0060] If the length of the flue measuring point position is long, the first stop 451 and the second stop 452 are kept 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 move to the unfolded position.

[0061] If the length of the flue measuring point position is general, the first stop 451 is rotated, so that the first sampling tube group is not controlled by the driving device 40. The limiting device controls the first sampling tube group to keep in the storage position, and the driving device 40 drives the second sampling tube group, the third sampling tube group and the fourth sampling tube group to be simultaneously unfolded to the unfolded position.

[0062] According to some embodiments of the present application, with reference to Figures 1-2 The flue gas sampling device 100 further comprises 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 is a fluororubber bellows, which can withstand high temperature. A metal sealing ring can also be arranged between the main tube 10 and the sampling tube 20, which is used to compensate for deformation and can also improve the sealing performance between the sampling tube 20 and the main tube 10.

[0064] The control method of the flue gas sampling device 100 according to the second aspect of the present application is used for the flue gas sampling device 100 according to the first aspect of the present application. The control method comprises the following steps:

[0065] According to the size of the flue, the stop of the adjusting valve 45 is adjusted.

[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 pipe 20 is controlled to rotate to the unfolded position, the driving mechanism drives the transmission assembly to move, so as to drive the sleeve 41 to move, and when the sleeve 41 moves, the sampling pipe 20 is pushed to unfold 90 degrees by the connecting rod 42, and the flue gas in the flue is suitable for being conveyed to the sampling interface 11 through the second sampling channel and the first sampling channel.

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

[0069] The sampling pipe 20 is controlled to rotate to the storage position, the driving mechanism drives the transmission assembly to move, so as to drive the sleeve 41 to move, and when the sleeve 41 moves, the sampling pipe 20 is driven to the storage position by the connecting rod 42, so as to reduce the volume of the flue gas sampling device 100, and facilitate the flue gas sampling device 100 to be removed from the flue.

[0070] According to the control method of the flue gas sampling device 100, the flue gas sampling device 100 is arranged, the sampling pipe 20 is arranged at one side of the main pipe 10 in the storage position, the volume space occupied by the flue gas sampling device 100 can be reduced, and the flue gas sampling device 100 is convenient to carry; the sampling pipe 20 is arranged at an angle with the main pipe 10 in the unfolded position, the flue gas in the flue is convenient to sample, and the method for sampling the flue gas is more simple and convenient.

[0071] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0072] In the description of the present application, it should be noted that, unless otherwise specifically specified and limited, the terms "mounting", "connecting", "connecting" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0073] In the description of the specification, the description of the terms "some embodiments", "optionally", "further", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are contained in at least one embodiment or example of the present application. In the specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0074] Although embodiments of the present application have been shown and described, it would be appreciated by those skilled in the art that changes, modifications, alternatives and variations to these embodiments could be made without departing from the principles and spirit of the application, 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.

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, 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.

4. The flue gas sampling device (100) according to claim 3, characterized in that, The transmission assembly further includes a gear and a gear rack, the gear rack being connected to the sleeve (41), the gear meshing with the gear rack, and the drive mechanism driving the gear to rotate.

5. The flue gas sampling device (100) according to claim 4, characterized in that, Also includes: Adjustment mark (43) and locking device (44), the adjustment mark (43) includes a first mark and a second mark, the first mark is provided on the gear rack, the second mark is provided on the main tube (10), the first mark and the second mark coincide, the sampling tube (20) is located in the unfolded position, in the unfolded position, the locking device (44) locks the gear rack.

6. The flue gas sampling device (100) according to claim 3, characterized in that, Along the length of the main tube (10), there are multiple sampling tubes (20), which are spaced apart along the length of the main tube (10). There are multiple sleeves (41), which are connected to the sampling tubes (20) one by one.

7. The flue gas sampling device (100) according to claim 6, characterized in that, The drive device (40) further includes: a regulating valve (45) having multiple positions, and multiple transmission components being provided. Each of the multiple transmission components 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.

8. The flue gas sampling device (100) according to claim 6, characterized in that, A plurality of sampling tubes (20) are connected circumferentially to the main tube (10).

9. 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).

10. A control method for a flue gas sampling device (100), characterized in that, The control method for the flue gas sampling device (100) according to any one of claims 1-9 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, so that the flue gas in the flue is suitable for being 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.

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