An adaptive flue gas detection device

Abstract

The present invention relates to the technical field of flue gas detection, and specifically to an adaptive flue gas detection device, which includes a flue, a laser gas analyzer, a detection tube, a connecting piece and an adjustment control unit. When there is no need to detect the flue gas inside the flue, the adjustment control unit can switch the detection tube from a detection state to an idle state to prevent the detection tube from obstructing the normal flow of the flue gas inside the flue. When the flue gas flows in the flue, the flue gas will generate viscous resistance on the inner wall of the flue. As the flue gas approaches the side wall of the flue, the flow speed of the flue gas slows down. When there is no need to detect the flue gas, the detection tube is in an idle state close to the side wall of the flue. At the same time, when it is necessary to detect the flue gas again, the adjustment control unit can switch the detection tube from an idle state to a detection state. During this process, the detection tube moves relative to the flue, and the flue gas can smoothly enter the inside of the detection tube through the air guide port, thereby improving the accuracy of the flue gas detection.

Description

Technical Field

[0001] The invention relates to the technical field of flue gas detection, and in particular to an adaptive flue gas detection device. Background Art

[0002] Accurately measuring gas concentration is crucial in industrial production and environmental monitoring. Laser gas analyzers, relying on the interaction between laser and gas molecules and tunable diode laser absorption spectroscopy technology, demonstrate high resolution and sensitivity, and are suitable for a variety of environments and application scenarios.

[0003] Among them, the in-situ through-type installation has significant advantages in gas analysis, and can realize true in-situ real-time monitoring, with good data timeliness and strong representativeness, and the monitoring does not introduce errors and requires low maintenance. The in-situ through-type installation is to fix the detection tube in the middle of the gas to be detected. However, in the flue of large-sized and high-dust equipment, the in-situ through-type installation of the detection tube is to fix the detection tube in the middle of the flue. When the flue gas flows along the flue, the flue gas will hit the detection tube, and the detection tube will hinder the normal flow of gas inside the flue. At the same time, the detection tube is in a state of connecting to the flue, but the detection tube is not connected to the external environment, which makes it easy for the flue gas to be unable to fully enter the detection tube, resulting in a decrease in the accuracy of flue gas detection. Summary of the invention

[0004] The present invention provides an adaptive flue gas detection device to solve the problem that the existing gas detection device cannot accurately detect the gas in the flue.

[0005] An adaptive flue gas detection device of the present invention adopts the following technical solution:

[0006] An adaptive flue gas detection device comprises a flue, a laser gas analyzer, a detection tube, a connecting piece and an adjustment control unit.

[0007] The flue is extended along a first direction; the laser gas analyzer includes a laser transmitter and a laser receiver, and the laser transmitter and the laser receiver are arranged on both sides of the flue along a second direction, wherein the first direction is perpendicular to the second direction, and the line between the laser transmitter and the laser receiver passes through the center of the circumscribed circle of the flue cross section; the detection tube is arranged inside the flue, and the detection tube has a detection state coaxial with the laser transmitter and an idle state fitted to the side wall of the flue; the side wall of the detection tube is provided with an air guide port connecting the inside of the flue with the inside of the detection tube; the connecting piece includes a first connecting tube and a second connecting tube, the first connecting tube is used to connect one end of the detection tube with the laser transmitter, and the second connecting tube is used to connect the other end of the detection tube with the laser receiver; the adjustment control switches the detection tube between the detection state and the idle state, and when the detection tube switches between the detection state and the idle state, the gas in the flue smoothly enters and exits the detection tube through the air guide port.

[0008] Furthermore, the first connecting tube and the second connecting tube are both made of hard materials; the connecting piece also includes two bellows, one of which is arranged between the first connecting tube and the detection tube, and the other bellows is arranged between the second connecting tube and the detection tube.

[0009] Furthermore, a positioning piece is provided on the inner wall of the flue, and the positioning piece is used to stabilize the detection tube in an idle state.

[0010] Furthermore, the positioning member is a positioning clip, which is fixedly arranged on the inner wall of the flue. When the detection tube is switched from the detection state to the idle state, the positioning clip clamps the detection tube to prevent the detection tube from shaking along the direction of smoke flow inside the flue.

[0011] Furthermore, the adjustment control unit includes an airbag. When the detection tube is in a detection state, the airbag is used to supply air to the inside of the first connecting tube or the second connecting tube, and the two bellows are extended at the same time, so that the detection tube is changed from a detection state to an idle state; when the detection tube is in an idle state, the airbag is used to extract the gas inside the first connecting tube or the second connecting tube, and the two bellows are shortened at the same time, so that the detection tube is changed from an idle state to a detection state.

[0012] Furthermore, the positioning clip is fixedly arranged at the upper end of the inner wall of the flue, and the air guide port of the side wall of the detection tube is arranged below the detection tube. When the gas in the airbag enters the first connecting tube or the second connecting tube, the gas in the airbag is discharged from the detection tube through the air guide port. When the gas flows outward through the air guide port, the gas gives a reverse thrust to the detection tube.

[0013] Furthermore, the adjustment control unit also includes two limit blocks and two limit rings, both of which are arranged inside the flue, one of which is coaxially fixedly connected to the first connecting pipe, and the other is coaxially fixedly connected to the second connecting pipe; the two limit blocks are respectively fixedly connected to the two ends of the detection tube, and the two limit blocks can be overlapped on the outer side walls of the limit rings. When each limit block overlaps a limit ring, the detection tube is coaxial with the first connecting pipe and the second connecting pipe.

[0014] Furthermore, the adjustment control unit also includes an extrusion cylinder, which is used to adjust the deformation of the airbag.

[0015] Furthermore, the control unit also includes a control pump, which adjusts the air pressure inside the airbag.

[0016] Furthermore, a filter screen is provided at the air guide port of the detection tube.

[0017] The beneficial effects of the present invention are as follows: an adaptive flue gas detection device of the present invention comprises a flue, a laser gas analyzer, a detection tube, a connecting piece and an adjusting control unit. When it is necessary to detect the gas inside the flue, the connecting line between the laser emitter and the laser emitter is set through the center of the circumscribed circle of the flue cross section to ensure that the laser emitted by the laser emitter can be received by the laser emitter. The detection tube is set inside the flue, wherein one end of the detection tube is connected to the laser emitter through a first connecting tube, and the other end of the detection tube is connected to the laser receiver through a second connecting tube. In this state, the laser emitted by the laser emitter passes through the first connecting tube, the detection tube, the second connecting tube in sequence. The detection tube is then received by the laser receiver. The smoke in the flue can enter the detection tube through the air guide port. When the laser passes through the detection tube, the laser detects the smoke in the flue. When there is no need to detect the smoke inside the flue, the control panel can switch the detection tube from the detection state to the idle state to prevent the detection tube from hindering the normal flow of smoke inside the flue. When the smoke flows in the flue, the smoke will produce viscous resistance on the inner wall of the flue. As the smoke approaches the side wall of the flue, the flow speed of the smoke slows down. When the detection tube is in the idle state, the detection tube is in a state close to the side wall of the flue, thereby reducing the impact of the detection tube on the normal flow of smoke inside the flue. At the same time, when the smoke needs to be detected again, the control panel can switch the detection tube from the idle state to the detection state. During this process, the detection tube moves relative to the flue, and the smoke can smoothly enter the detection tube through the air guide port, thereby improving the accuracy of smoke detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 A schematic structural diagram of an adaptive flue gas detection device provided by an embodiment of the present invention;

[0020] Figure 2 An exploded diagram of the structure of an adaptive flue gas detection device provided by an embodiment of the present invention;

[0021] Figure 3 A front view of a detection tube in a detection state in an adaptive flue gas detection device provided by an embodiment of the present invention;

[0022] Figure 4 for Figure 3 A partial enlarged view of the middle A;

[0023] Figure 5 A side view of an adaptive flue gas detection device provided by an embodiment of the present invention;

[0024] Figure 6 for Figure 5 Cross-sectional view in the BB direction;

[0025] Figure 7 A front view of a detection tube in an adaptive flue gas detection device provided by an embodiment of the present invention when the detection tube is in an idle state;

[0026] Figure 8 for Figure 7 A partial enlarged view of point C in the middle.

[0027] In the figure: 110, flue; 120, laser transmitter; 130, laser receiver; 140, detection tube; 150, first connecting tube; 160, second connecting tube; 170, bellows; 180, positioning clip; 190, airbag; 210, limit block; 220, limit ring; 230, filter. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0030] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0031] like Figures 1 to 8 As shown, an embodiment of the present invention provides an adaptive flue gas detection device, which includes a flue 110, a laser gas analyzer, a detection tube 140, a connecting piece and an adjustment control unit.

[0032] The flue 110 is extended along the first direction. Specifically, the length direction of the flue 110 is the first direction. Figure 3 As shown, the first direction is the front-to-back direction, and the flue 110 is extended along the front-to-back direction.

[0033] The laser gas analyzer includes a laser transmitter 120 and a laser receiver 130. The laser transmitter 120 and the laser receiver 130 are arranged on both sides of the flue 110 along the second direction, wherein the first direction is perpendicular to the second direction. Figure 3 As shown, the second direction is the left-right direction. On the horizontal plane, the first direction is perpendicular to the second direction. The laser transmitter 120 and the laser receiver 130 are arranged on the left and right sides of the flue 110. The laser transmitter 120 can emit laser to the laser receiver 130, and the line between the laser transmitter 120 and the laser receiver 130 passes through the center of the circumscribed circle of the cross section of the flue 110. In a specific setting, the line between the laser transmitter 120 and the laser receiver 130 can divide the cross section of the flue 110 into an upper half and a lower half. When the flue gas flows in the flue 110, the flue gas will generate viscous resistance on the inner wall of the flue 110. As the flue gas approaches the side wall of the flue 110, the flow speed of the flue gas slows down. By limiting the positions of the laser transmitter 120 and the laser receiver 130, the accuracy of the laser transmitter 120 and the laser receiver 130 in detecting the smoke inside the flue 110 is ensured.

[0034] The detection tube 140 is arranged inside the flue 110. The detection tube 140 has a detection state coaxial with the laser emitter 120 and an idle state close to the side wall of the flue 110. When it is necessary to detect the smoke inside the flue 110, the detection tube 140 is in the detection state, and the detection tube 140 is in the middle of the flue 110; when it is not necessary to detect the smoke inside the flue 110, the detection tube 140 is in the idle state, and the detection tube 140 is close to the side wall of the flue 110. When the smoke flows in the flue 110, the smoke will generate viscous resistance on the inner wall of the flue 110. As the smoke approaches the side wall of the flue 110, the flow speed of the smoke slows down. When the detection tube 140 is close to the side wall of the flue 110, the influence of the detection tube 140 on the normal flow of the smoke inside the flue 110 can be reduced. The side wall of the detection tube 140 is provided with an air duct connecting the interior of the flue 110 and the interior of the detection tube 140. When the detection tube 140 changes from an idle state to a detection state, the detection tube 140 can move relative to the flue 110, and the smoke inside the flue 110 enters the interior of the detection tube 140 through the air duct.

[0035] The connecting piece includes a first connecting pipe 150 and a second connecting pipe 160. The first connecting pipe 150 is used to connect one end of the detection tube 140 with the laser emitter 120, and the second connecting pipe 160 is used to connect the other end of the detection tube 140 with the laser receiver 130. When the detection tube 140 is in the detection state, the first connecting pipe 150, the second connecting pipe 160, the detection tube 140, the laser emitter 120 and the laser receiver 130 are in a coaxial state. When the detection tube 140 is in the idle state, the laser emitter 120 and the detection tube 140 are in a parallel state. The adjustment control can switch the detection tube 140 between the detection state and the idle state, and when the detection tube 140 switches between the detection state and the idle state, the gas in the flue 110 can smoothly enter and exit the detection tube 140 through the gas guide port, thereby improving the accuracy of smoke detection.

[0036] In an adaptive flue 110 gas detection device of the present invention, when it is necessary to detect the gas inside the flue 110, the connecting line between the laser emitter 120 and the laser emitter 120 is set through the center of the circumscribed circle of the cross section of the flue 110 to ensure that the laser emitted by the laser emitter 120 can be received by the laser emitter 120, and the detection tube 140 is set inside the flue 110, wherein one end of the detection tube 140 is connected to the laser emitter 120 through the first connecting tube 150, and the other end of the detection tube 140 is connected to the laser receiver 130 through the second connecting tube 160. In this state, the laser emitted by the laser emitter 120 passes through the first connecting tube 150, the detection tube 140, and the second connecting tube 160 in sequence, and is then received by the laser receiver 130. The smoke in the flue 110 can enter the detection tube 140 through the air guide port. When the laser passes through the detection tube 140, the laser detects the smoke in the flue 110. When there is no need to detect the smoke in the flue 110, the adjustment control unit can switch the detection tube 140 from the detection state to the idle state to prevent the detection tube 140 from obstructing the normal flow of the smoke in the flue 110. When the smoke flows in the flue 110, the smoke will generate viscous resistance on the inner wall of the flue 110. As the smoke approaches the side wall of the flue 110, the flow speed of the smoke slows down. When the detection tube 140 is in the idle state, the detection tube 140 is close to the side wall of the flue 110, thereby reducing the influence of the detection tube 140 on the normal flow of the smoke in the flue 110. At the same time, when the smoke needs to be tested again, the control unit can switch the detection tube 140 from an idle state to a detection state. During this process, the detection tube 140 moves relative to the flue 110, and the smoke can smoothly enter the detection tube 140 through the air guide port, thereby improving the accuracy of smoke detection.

[0037] In one embodiment, the first connecting tube 150 and the second connecting tube 160 are both made of hard material, and are fixedly connected to the flue 110. One end of the first connecting tube 150 is connected to the laser transmitter 120, and the other end of the first connecting tube 150 is connected to the inside of the flue 110. One end of the second connecting tube 160 is connected to the laser receiver 130, and the other end of the second connecting tube 160 is connected to the inside of the flue 110. The connecting piece also includes two bellows 170, the length of which can be changed, one of which is arranged between the first connecting tube 150 and the detection tube 140, and the other bellows 170 is arranged between the second connecting tube 160 and the detection tube 140. When the detection tube 140 changes from the detection state to the idle state, the two bellows 170 extend at the same time, and when the detection tube 140 changes from the idle state to the detection state, the two bellows 170 shorten at the same time. When the detection tube 140 reaches the detection state, the two bellows 170 are in the shortest state. Furthermore, by providing two bellows 170, it is prevented that the movement of the detection tube 140 is hindered when the detection tube 140 changes from the detection state to the idle state.

[0038] In one of the embodiments, a positioning piece is provided on the inner wall of the flue 110, and the positioning piece is used to stabilize the detection tube 140 in an idle state. Under the action of the positioning piece, after the detection tube 140 is changed from the detection state to the idle state, the detection tube 140 can stably stay in a state close to the side wall of the flue 110. At the same time, under the action of the positioning piece, when the flowing smoke acts on the detection tube 140, the detection tube 140 can still stably stay in the idle state.

[0039] In one embodiment, the positioning member is a positioning clamp 180, which includes a first claw and a second claw, one end of the first claw is rotatably connected to one end of the second claw, the first claw and the second claw are both arranged in an arc shape, and a torsion spring is arranged at the connection between the first claw and the second claw. In the initial state, under the action of the torsion spring, the gap between the first claw and the second claw is slightly smaller than the outer diameter of the detection tube 140, so as to ensure that the first claw and the second claw can stably clamp the detection tube 140. The positioning frame is fixedly arranged on the inner wall of the flue 110, and when the detection tube 140 is switched from the detection state to the idle state, the positioning clamp 180 can clamp the detection tube 140, and the positioning clamp 180 can prevent the detection tube 140 from shaking inside the flue 110 along the direction of smoke flow.

[0040] In one embodiment, the control unit includes an airbag 190, which can supply air to the first connecting tube 150 or the second connecting tube 160. When the detection tube 140 is in the detection state, the airbag 190 is used to supply air to the first connecting tube 150 or the second connecting tube 160, and the two bellows 170 are extended at the same time, so that the detection tube 140 changes from the detection state to the idle state. The airbag 190 can also extract the gas inside the first connecting tube 150 or the second connecting tube 160. When the detection tube 140 is in the idle state, the airbag 190 is used to extract the gas inside the first connecting tube 150 or the second connecting tube 160, and the two bellows 170 are shortened at the same time, so that the detection tube 140 changes from the idle state to the detection state. Furthermore, when the detection tube 140 changes from an idle state to a detection state, the airbag 190 extracts the gas inside the first connecting tube 150 or the second connecting tube 160. Since the first connecting tube 150 and the second connecting tube 160 are both connected to the detection tube 140, when the gas inside the detection tube 140 enters the airbag 190, the smoke inside the smoke tube can quickly enter the detection tube 140 through the air guide port.

[0041] In one embodiment, the positioning clip 180 is fixedly arranged at the upper end of the inner wall of the flue 110, and the air guide port of the side wall of the detection tube 140 is arranged below the detection tube 140. When the gas in the airbag 190 enters the first connecting tube 150 or the second connecting tube 160, the gas in the airbag 190 is discharged from the detection tube 140 through the air guide port. When the gas flows outward through the air guide port, the gas can give the detection tube 140 a certain reverse thrust. When the detection tube 140 has a tendency to move upward, the detection tube 140 stretches the two bellows 170. Further, when the bellows 170 stretches, the volume of the bellows 170 increases. By regulating the amount of gas in the airbag 190, it is ensured that there is enough gas in the airbag 190, and then it is ensured that when the bellows 170 stretches, there is still gas discharged from the air guide port into the flue 110. Furthermore, when the detection tube 140 is changed from an idle state to a detection state, the airbag 190 extracts the gas inside the first connecting tube 150 and the second connecting tube 160, and by adjusting the extraction speed of the airbag 190, it is ensured that during the extraction process of the airbag 190, smoke enters the detection tube 140 through the air guide port. At the same time, the two bellows 170 are shortened, so that the detection tube 140 can be smoothly transformed from the idle state to the detection state.

[0042] In one of the embodiments, the adjustment control unit also includes two limit blocks 210 and two limit rings 220, and the two limit rings 220 are both arranged inside the flue 110, one of the limit rings 220 is coaxially fixedly connected to the first connecting pipe 150, and the other limit ring 220 is coaxially fixedly connected to the second connecting pipe 160; the two limit blocks 210 are respectively fixedly connected to the two ends of the detection tube 140, and the two limit blocks 210 can overlap the outer side walls of the limit rings 220. When each limit block 210 overlaps a limit ring 220, the detection tube 140 is coaxial with the first connecting tube 150 and the second connecting tube 160. When the detection tube 140 changes from an idle state to a detection state, the length of the two bellows 170 gradually shortens. Under the action of the two limit blocks 210 and the two limit rings 220, the two bellows 170 are prevented from extending in the opposite direction.

[0043] In one embodiment, the control unit further includes an extrusion cylinder, which is used to adjust the deformation of the airbag 190. In this embodiment, the airbag 190 is disposed on the first connecting tube 150, the airbag 190 is connected to the inside of the first connecting tube 150, the extrusion cylinder is fixedly connected to the first connecting tube 150, and the output shaft of the extrusion cylinder is fixedly connected to the airbag 190. When the length of the extrusion cylinder changes, the airbag 190 extracts gas from the first connecting tube 150 or the airbag 190 supplies gas to the first connecting tube 150. Furthermore, the length of the extrusion cylinder can change rapidly.

[0044] In one embodiment, the control unit further includes a control pump, which can adjust the air pressure inside the airbag 190. In this embodiment, the airbag 190 is disposed on the first connecting tube 150, the airbag 190 is connected to the inside of the first connecting tube 150, and the control pump can supply or exhaust air to the inside of the airbag 190.

[0045] In one of the embodiments, a filter 230 is provided at the air outlet of the detection tube 140. By providing the filter 230 at the air outlet, excessive smoke particles are prevented from entering the detection tube 140. When the smoke enters the detection tube 140 or is discharged from the detection tube 140 through the air outlet, the flowing gas can automatically clean the filter 230 to prevent the filter 230 from being blocked by particles in the smoke.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An adaptive flue gas detection device, characterized in that: include: A flue, the flue extending along a first direction; A laser gas analyzer, the laser gas analyzer comprises a laser transmitter and a laser receiver, the laser transmitter and the laser receiver are arranged on both sides of the flue along the second direction, wherein the first direction is perpendicular to the second direction, and a line between the laser transmitter and the laser receiver passes through the center of a circumscribed circle of a cross section of the flue; A detection tube is arranged inside the flue, and the detection tube has a detection state coaxial with the laser emitter and an idle state in contact with the side wall of the flue; the side wall of the detection tube is provided with an air guide port connecting the inside of the flue with the inside of the detection tube; A connecting piece, the connecting piece includes a first connecting pipe and a second connecting pipe, the first connecting pipe is used to connect one end of the detection pipe with the laser transmitter, and the second connecting pipe is used to connect the other end of the detection pipe with the laser receiver; The control unit is adjusted to switch the detection tube between the detection state and the idle state. When the detection tube is switched between the detection state and the idle state, the gas in the flue smoothly enters and exits the detection tube through the gas guide port.

2. An adaptive flue gas detection device according to claim 1, characterized in that: The first connecting tube and the second connecting tube are both made of hard materials; the connecting piece also includes two bellows, one of which is arranged between the first connecting tube and the detection tube, and the other bellows is arranged between the second connecting tube and the detection tube.

3. An adaptive flue gas detection device according to claim 2, characterized in that: A positioning piece is arranged on the inner wall of the flue, and the positioning piece is used to stabilize the detection tube in an idle state.

4. An adaptive flue gas detection device according to claim 3, characterized in that: The positioning piece is a positioning clip, which is fixedly arranged on the inner wall of the flue. When the detection tube is switched from the detection state to the idle state, the positioning clip clamps the detection tube to prevent the detection tube from shaking along the direction of smoke flow inside the flue.

5. An adaptive flue gas detection device according to claim 4, characterized in that: The regulating component includes an airbag. When the detection tube is in a detection state, the airbag is used to supply air to the inside of the first connecting tube or the second connecting tube, and the two bellows are extended at the same time, so that the detection tube is changed from the detection state to the idle state; when the detection tube is in an idle state, the airbag is used to extract the gas inside the first connecting tube or the second connecting tube, and the two bellows are shortened at the same time, so that the detection tube is changed from the idle state to the detection state.

6. An adaptive flue gas detection device according to claim 5, characterized in that: The positioning clip is fixedly arranged at the upper end of the inner wall of the flue, and the air guide port of the side wall of the detection tube is arranged below the detection tube. When the gas in the airbag enters the first connecting tube or the second connecting tube, the gas in the airbag is discharged from the detection tube through the air guide port. When the gas flows outward through the air guide port, the gas gives a reverse thrust to the detection tube.

7. The adaptive flue gas detection device according to claim 5, characterized in that: The adjustment control unit also includes two limit blocks and two limit rings, both of which are arranged inside the flue, one of which is coaxially fixedly connected to the first connecting pipe, and the other is coaxially fixedly connected to the second connecting pipe; the two limit blocks are respectively fixedly connected to the two ends of the detection tube, and the two limit blocks can be overlapped on the outer side walls of the limit rings. When each limit block overlaps a limit ring, the detection tube is coaxial with the first connecting pipe and the second connecting pipe.

8. An adaptive flue gas detection device according to claim 4, characterized in that: The control unit also includes an extrusion cylinder, which is used to adjust the deformation of the airbag.

9. The adaptive flue gas detection device according to claim 4, characterized in that: The control unit also includes a control pump, which adjusts the air pressure inside the airbag.

10. The adaptive flue gas detection device according to claim 1, characterized in that: A filter screen is arranged at the air guide port of the detection tube.

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