Flue sampling structure

Abstract

The invention discloses a flue sampling structure, and relates to the technical field of smoke sampling equipment, the flue sampling structure comprises a sampling host and a sampling probe arranged on the sampling host, the inner diameter of the sampling probe is at least 20mm, and the wall thickness of the sampling probe is at least 8mm; the outer wall of the sampling probe is provided with a plurality of groups of reinforcing devices for reinforcing the sampling probe, the outer wall of the sampling probe is also provided with an outer protection device around all the reinforcing devices, and the length size of the outer protection device is smaller than or equal to the length size of the sampling probe. The structural strength and the application stability of the sampling probe in the environment of high temperature, high smoke concentration and high smoke dust flow rate can be improved, the phenomena that the sampling probe is too early and excessively worn and even broken are reduced, and the service life of the sampling probe after long-time use can be guaranteed.

Description

Technical Field

[0001] This application relates to the technical field of soot sampling equipment, and particularly to a flue sampling structure. Background Art

[0002] In the application of industrial gas monitoring systems, the gas measurement in the flue of certain working conditions is characterized by a large dust concentration, uneven particle sizes, and a high flue gas flow rate.

[0003] The probe rods of traditional sampling probes are mostly stainless steel pipes with an outer diameter of 25 mm, an inner diameter of 15 mm, and a wall thickness of 5 mm. One end of the sampling probe is fixed to the sampling box through a flange; a reinforcing cylinder is also appropriately installed on the outer wall of the sampling probe near the sampling box. The reinforcing cylinder abuts against the flange and is fixedly connected. After the sampling probe extends into the flue, it can extract flue gas. In the working conditions with a small dust concentration and a low flue gas flow rate, this traditional sampling probe can be used normally.

[0004] However, in the working conditions with a large dust concentration and a high flue gas flow rate, when the high-temperature flue gas flows through the sampling probe at a high speed, the soot particles carried in the flue gas will impact the sampling probe at an extremely high speed. Its effect is equivalent to a file automatically wearing the sampling probe. Over time, it is extremely easy for the sampling probe to be worn and broken, affecting normal use. Summary of the Invention

[0005] Object of the Invention: This application provides a flue sampling structure, aiming to improve the technical problem that the sampling probe is frequently impacted by the soot in the high-temperature and high-flow-rate flue gas during sampling in the flue, and thus is prone to wear and breakage.

[0006] Technical Solution: This application provides a flue sampling structure, including a sampling host and a sampling probe arranged on the sampling host. The inner diameter of the sampling probe is at least 20 mm, and the wall thickness of the sampling probe is at least 8 mm; a plurality of reinforcing devices for reinforcing the sampling probe are arranged on the outer wall of the sampling probe, and an outer protection device is arranged around all the reinforcing devices on the outer wall of the sampling probe. The length dimension of the outer protection device is less than or equal to the length dimension of the sampling probe.

[0007] By adopting the above technical solution, the inner diameter, wall thickness and outer diameter of the sampling probe are increased compared with traditional sampling equipment, enabling the sampling probe to be more durable in environments with high temperature, high flue gas concentration and high flue gas flow rate, and less likely to experience wear and fracture, which helps to ensure the stability of the long-term use of the sampling probe and extends the service life of the sampling probe; the reinforcement device strengthens the structure outside the sampling probe, improving the overall strength and impact resistance of the sampling probe; the outer protection device can receive the direct impact of part of the soot outside the sampling probe, reducing the phenomenon of premature and excessive wear, or even fracture of the sampling probe after being frequently impacted by the soot.

[0008] Further, multiple groups of the reinforcement devices are spaced apart and evenly distributed along the circumferential direction of the sampling probe; each group of the reinforcement devices includes a reinforcing rib plate, the reinforcing rib plate is welded on the outer wall of the sampling probe, and the reinforcing rib plate extends along the length direction of the sampling probe and is of the same length as the sampling probe.

[0009] By adopting the above technical solution, the reinforcing rib plate has high structural strength. When installed on the outer wall of the sampling probe, it can receive part of the direct impact of the soot, reducing the pressure on the sampling probe from the impact of the soot; moreover, the reinforcing rib plates arranged around the outer circumference of the sampling probe can enhance the overall structural strength of the sampling probe, reducing the problem of direct fracture of the sampling probe after continuous impact and wear.

[0010] Further, a plurality of heat dissipation channels for heat dissipation are provided through each reinforcing rib plate, and all the heat dissipation channels are spaced apart along the length direction of the reinforcing rib plate.

[0011] By adopting the above technical solution, the heat dissipation channels can accelerate the heat dissipation speed of the reinforcing rib plate, reducing the problem that the strength and hardness of the reinforcing rib plate decrease due to being continuously in a high-temperature environment, and thus being more likely to be impacted by the soot and wear faster, or even fracture.

[0012] Further, the outer protection device includes a first flange fixed at one end of the sampling probe, an outer fixing cylinder fittingly sleeved on the outer walls of all the reinforcing rib plates, a second flange fixed at one end of the outer fixing cylinder, and two asbestos gaskets corresponding to the first flange and the second flange; wherein, the length dimension of the outer fixing cylinder is smaller than the length dimension of the sampling probe; one of the asbestos gaskets is arranged between the first flange and the second flange, and the other asbestos gasket is arranged between the second flange and the sampling main body; after the first flange, the second flange and the sampling box body are abutted against each other, they are fixedly connected by bolts.

[0013] By adopting the above technical solution, the outer fixing cylinder can bear the direct impact of soot outside the sampling probe, achieving the effect of protecting the sampling probe; in addition, the outer fixing cylinder is suitably fitted on all the reinforcing rib plates, which helps to improve the overall structural strength of the sampling probe and further reduces the phenomenon of the sampling probe breaking due to long-term use and wear; after the first flange and the second flange are locked by bolts, the installation strength and stability of the sampling probe and the outer fixing cylinder on the sampling main machine can be ensured.

[0014] Furthermore, the outer protection device further includes an extension protection mechanism that can be detachably connected to the reinforcement cylinder. The extension protection mechanism includes: an extension protection cylinder, which is suitably fitted on the outer walls of all the reinforcing rib plates, and after the extension protection cylinder abuts against the reinforcement cylinder, the overall length dimension of the extension protection cylinder and the reinforcement cylinder is equal to the length dimension of the sampling probe; a plurality of inner embedding grooves are respectively formed in the outer wall of the extension protection cylinder along its circumferential direction, and a main rotation unit is arranged in each inner embedding groove, and multiple groups of main control units are arranged on the main rotation unit; the main rotation unit can rotate in the inner embedding groove, and the multiple groups of main control units that follow the main rotation unit to rotate can block the impact of soot during the rotation process, and can push the soot out of the inner embedding groove; a guiding rotation assembly is configured on the outer wall of the reinforcement cylinder and can be detachably connected to the extension protection cylinder; after the guiding rotation assembly is fixedly connected to the extension protection cylinder, the guiding rotation assembly can drive the extension protection cylinder to rotate along the circumferential direction of the sampling probe to block the impact of soot and can push the soot out of the inner embedding groove.

[0015] By adopting the above technical solution, the extension protection cylinder cooperates with the outer fixing cylinder outside the sampling probe, and the two can completely cover the sampling probe, effectively reducing the phenomenon of soot directly impacting and wearing the sampling probe from the outside; the main rotation unit rotates in the inner embedding groove, enabling the main control unit to counter-impact a part of the soot that is about to impact the extension protection cylinder, and since the main control unit is continuously rotating, it can disturb the air around the inner embedding groove, changing the movement trajectory of the soot, thereby helping to reduce the quantity and area of the soot impacting the extension protection cylinder; the guiding rotation assembly can drive the extension protection cylinder to rotate along the circumferential direction of the sampling probe, making it difficult for the high-speed moving soot to impact a specific part or local area of the extension protection cylinder, thereby helping to reduce the problem of the extension protection cylinder breaking due to local excessive wear.

[0016] Furthermore, each group of the main rotating units includes: a driving motor, which is arranged in the side wall of the embedded groove and located at one end of the embedded groove in the length direction; a connecting seat, which is arranged in the side wall of the embedded groove and located at the other end of the embedded groove in the length direction; a connecting rod, one end of which is fixedly connected to the output end of the driving motor, and the other end of the connecting rod is inserted in the connecting seat; all the main control units are detachably mounted on the connecting rod, and all the main control units are spaced and evenly distributed along the length direction of the connecting rod; after the connecting rod follows the rotation of the output end of the driving motor, all the main control units can follow the rotation in the embedded groove.

[0017] By adopting the above technical solution, the driving motor rotates the output end, and the connecting rod connected to the output end of the driving motor can rotate synchronously, so that the main control unit installed on the connecting rod can continuously rotate in the embedded groove, and can counter-impact the smoke and dust through the main control unit, and create airflow disturbances, thereby changing the flow trajectory of the smoke and dust around the embedded groove.

[0018] Furthermore, each group of the main control units comprises: two arc-shaped plates which can be adapted to be mounted on the outer wall of the connecting rod and spliced ​​with each other, each of the arc-shaped plates being detachably connected to the connecting rod by bolts; an impact-resistant steel plate which is arranged on the outer wall of one of the arc-shaped plates, and a gap is left between the impact-resistant steel plate and the side wall of the embedded groove; the impact-resistant steel plate is used to bear the impact of the smoke in the flow, and when the impact-resistant steel plate rotates with the connecting rod, the impact-resistant steel plate can counter-impact the smoke to remove the smoke from the The dust guiding steel plate is arranged on the outer wall of the other arc-shaped plate, and the dust guiding steel plate and the impact-resistant steel plate are respectively located at the radial ends of the connecting rod; the length of the dust guiding steel plate is greater than the length of the impact-resistant steel plate, and one end of the dust guiding steel plate away from the arc-shaped plate is arranged as an arc-shaped surface adapted to the inner cavity of the embedded groove, and the dust guiding steel plate is close to the side wall of the embedded groove through the arc-shaped surface but does not resist, so as to push out the smoke and dust on the inner bottom wall of the embedded groove.

[0019] By adopting the above technical solution, after the arc plate is quickly and detachably fixed to the connecting rod by bolts, the impact-resistant steel plate and the dust-guiding steel plate can rebound the smoke and dust while following the rotation of the connecting rod, making it difficult for the smoke and dust to directly impact the extension tube, thereby protecting the extension tube; and the rotating impact-resistant steel plate and the dust-guiding steel plate can also disturb the flow of air around the embedded groove to change the trajectory of the high-speed flowing smoke and dust, thereby reducing the amount of smoke and dust that directly impacts the extension tube.

[0020] Furthermore, the embedded groove is also provided with a clearance opening on one side of its inner cavity for allowing smoke and dust to escape from the embedded groove.

[0021] By adopting the above technical solution, the opening can make the opening diameter of the embedded groove on one side larger, which is convenient for the impact-resistant steel plate and the dust-guiding steel plate to push the smoke and dust out of the embedded groove during rotation, thereby accelerating the speed at which the smoke and dust escape from the embedded groove.

[0022] Furthermore, the guide assembly is a disc-type linear motor, which includes a disc main body fixed on the outer fixed cylinder and a movable end movably arranged on the disc main body and capable of moving along the circumferential direction of the outer fixed cylinder; an outer connecting plate is also arranged on the outer peripheral wall of the extension cylinder and at one end close to the outer fixed cylinder, and the outer connecting plate is detachably connected to the movable end through a connecting unit.

[0023] By adopting the above technical solution, when the mobile end moves on the disc body, the mobile end can carry the outer connecting plate and the extension tube to rotate along the circumference of the sampling probe, thereby realizing the automatic and stable rotation of the extension tube on the sampling probe.

[0024] Furthermore, the connecting unit includes a connecting screw, a clamping spring and a locking nut; the connecting screw is vertically fixed on the side wall of the movable end, and the clamping spring is sleeved on the connecting screw; after the end of the connecting screw away from the movable end passes through the outer connecting plate, the locking nut is threadedly connected to the connecting screw, and the clamping spring is tensioned between the movable end and the outer connecting plate.

[0025] By adopting the above technical solution, after the connecting screw rod passes through the outer connecting plate, the locking nut can be threaded and tightened on the connecting screw rod; the spring is compressed and tensioned between the moving end and the outer connecting plate, thereby ensuring the connection strength between the outer connecting plate and the moving end; and it is easy to quickly disassemble or install.

[0026] In summary, this application has at least the following beneficial technical effects: The inner diameter, wall thickness and outer diameter of the sampling probe have been increased compared to traditional sampling equipment, making the sampling probe more durable in high temperature, high flue gas concentration and high flue gas flow rate environments, and less prone to wear and breakage, which helps to ensure the stability of the sampling probe during long-term use and extend the service life of the sampling probe; the reinforcement device has structurally reinforced the outside of the sampling probe, thereby improving the overall strength and impact resistance of the sampling probe; the external protection device can withstand part of the direct impact of smoke and dust on the outside of the sampling probe, reducing the phenomenon of premature, excessive wear and even breakage of the sampling probe after frequent impact of smoke and dust.

[0027] The extension protection cylinder is matched with the outer fixing cylinder outside the sampling probe, and the two can completely cover the sampling probe, effectively reducing the phenomenon that soot directly impacts and wears the sampling probe from the outside of the sampling probe; the main rotation unit rotates in the embedded groove, enabling the main control unit to counter-impact part of the soot that is about to impact the extension protection cylinder. Moreover, since the main control unit rotates continuously, it can disturb the air around the embedded groove, change the movement trajectory of the soot, and thus help reduce the quantity and area of the soot impacting the extension protection cylinder; the guiding rotation assembly can drive the extension protection cylinder to rotate circumferentially along the sampling probe, making it difficult for the high-speed moving soot to impact a specific part or local area of the extension protection cylinder, and thus helping to reduce the problem of the extension protection cylinder breaking due to local excessive wear. Description of the Drawings

[0028] Figure 1 is a schematic diagram of a flue gas sampling structure in Embodiment 1 of the present application; Figure 2 is a schematic diagram of the positional relationship between the reinforcing rib plate and the sampling probe in Embodiment 1 of the present application; Figure 3 is Figure 1 an enlarged schematic diagram of part A in Figure 4 is a schematic diagram of a flue gas sampling structure in Embodiment 2 of the present application; Figure 5 is an exploded schematic diagram of the connection relationship between the extension protection cylinder and the outer fixing cylinder in Embodiment 2 of the present application; Figure 6 is a cross-sectional schematic diagram of the positional relationship between the relief opening and the embedded groove in Embodiment 2 of the present application; Figure 7 is Figure 5 an enlarged schematic diagram of part B in Figure 8 is Figure 5 an enlarged schematic diagram of part C in Figure 9 is an exploded schematic diagram of the connection relationship between the main control unit and the connecting rod in Embodiment 2 of the present application.

[0029] Description of the Reference Numerals: 1. Sampling host; 2. Sampling probe; 3. Reinforcement device; 31. Reinforcement rib plate; 311. Heat dissipation channel; 4. External protection device; 41. First flange; 42. External fixed tube; 43. Second flange; 44. Asbestos gasket; 5. Extension mechanism; 6. Extension tube; 61. External link plate; 62. Embedded groove; 621. Make way opening; 63. Main rotating unit; 631. Driving motor; 632. Connecting seat; 633. Connecting rod; 64. Main control unit; 641. Arc plate; 642. Impact-resistant steel plate; 643. Dust-guiding steel plate; 6431. Arc surface; 7. Guide assembly; 71. Disc body; 72. Moving end; 8. Connecting assembly; 81. Connecting screw; 82. Tightening spring; 83. Locking nut. DETAILED DESCRIPTION

[0030] The embodiment of the present application discloses a flue sampling structure.

[0031] The following is combined with Figures 1-9 This application is described in further detail.

[0032] Example 1 Reference Figure 1 A flue sampling structure includes a sampling host 1 and a sampling probe 2 arranged on the sampling host 1. The sampling probe 2 is a stainless steel pipe with a wall thickness of at least 8 mm and an inner diameter of at least 20 mm; in this embodiment, the wall thickness of the sampling probe 2 can be 10 mm, the inner diameter of the sampling probe 2 can be 25 mm, and the outer diameter of the sampling probe 2 can be 45 mm.

[0033] Reference Figure 1 Compared with the traditional sampling probe 2 with small wall thickness and small inner diameter, the sampling probe 2 in this embodiment has the characteristics of larger wall thickness, inner diameter and outer diameter; after the end of the sampling probe 2 away from the sampling host 1 is extended into the flue, the sampling probe 2 can stably sample for a long time in an environment of high temperature, high smoke concentration and high delayed flow rate, has excellent wear resistance and fracture resistance, and has a longer service life.

[0034] Reference Figure 2 In order to continuously improve the fracture resistance of the sampling probe 2, the outer wall of the sampling probe 2 is further provided with multiple groups of reinforcement devices 3. In this embodiment, the number of the reinforcement devices 3 can be eight groups, and the eight groups of reinforcement devices 3 are spaced and evenly distributed along the circumference of the sampling probe 2.

[0035] Reference Figure 2 For the sake of ease of explanation and understanding, a specific explanation is given by taking one set of reinforcement devices 3 as an example. The reinforcement device 3 includes a reinforcing rib plate 31, which can be a rare earth alloy plate with a hardness greater than that of the sampling probe 2, and has the characteristics of high toughness, impact resistance, high temperature resistance, smoke erosion resistance, and wear resistance.

[0036] Reference Figure 2 Figure 2 , in this embodiment, the reinforcing rib plate 31 is welded to the outer wall of the sampling probe 2, and the reinforcing rib plate 31 extends along the length direction of the sampling probe 2; moreover, the length dimension of the reinforcing rib plate 31 is equal to the length dimension of the sampling probe 2, so as to reinforce the sampling probe 2 outside the sampling probe 2 and reduce the phenomenon that the sampling probe 2 breaks.

[0037] Reference Figure 2 Figure 2 , a heat dissipation channel 311 is also provided through the side wall of the reinforcing rib plate 31 along its thickness direction, and the number of the heat dissipation channels 311 can be multiple, and all the heat dissipation channels 311 are spaced and equally distributed along the length direction of the reinforcing rib plate 31. The heat dissipation channel 311 helps to accelerate the heat dissipation speed of the reinforcing rib plate 31 in a high-temperature environment and reduce the problem that the reinforcing rib plate 31 is more likely to be worn and broken due to the decrease in strength and hardness under continuous high temperature.

[0038] Reference Figure 3 Figure 3 , an outer protection device 4 is further provided around the outer wall of the sampling probe 2 for all the reinforcing rib plates 31. The outer protection device 4 includes a first flange 41, an outer fixing cylinder 42, a second flange 43 and two asbestos gaskets 44. Among them, the outer fixing cylinder 42 can be a cylinder made of rare earth alloy, which has excellent anti-wear and anti-fracture properties. Moreover, the length dimension of the outer fixing cylinder 42 is less than or equal to the length dimension of the sampling probe 2; in this embodiment, the length dimension of the outer fixing cylinder 42 is less than the length dimension of the sampling probe 2.

[0039] Reference Figure 3 Figure 3 , the first flange 41 is welded to the end wall at one end of the sampling probe 2 in the length direction, so as to increase the contact area between the sampling probe 2 and the sampling main machine 1, so that the sampling probe 2 can be fixed on the sampling main machine 1 subsequently.

[0040] Reference Figure 3 Figure 3 , the second flange 43 is welded to the end wall at one end of the outer fixing cylinder 42 in the length direction, and the outer fixing cylinder 42 and the second flange 43 can be properly fitted on the outer peripheral wall of all the reinforcing rib plates 31 to reinforce outside the reinforcing rib plates 31. Moreover, the outer fixing cylinder 42 can also directly bear part of the impact of the soot, reducing the direct impact of the soot on the outer wall of the sampling probe 2, and thus avoiding the problem that the sampling probe 2 is prone to wear and break.

[0041] Reference Figure 3 Figure 3 , the outer peripheral dimensions of the asbestos gasket 44 are the same as the outer peripheral dimensions of the first flange 41 and the second flange 43. One of the asbestos gaskets 44 is pressed tightly between the first flange 41 and the sampling main machine 1, and the other asbestos gasket 44 is pressed tightly between the second flange 43 and the first flange 41.

[0042] Reference Figure 3When the second flange 43, the first flange 41 and the sampling host 1 are pressed against each other, the bolts can pass through the second flange 43 and the first flange 41 in sequence and be screwed into the preset thread grooves on the outer wall of the sampling host 1, so that the second flange 43 and the first flange 41 are fixedly connected and fixed to the outer wall of the sampling host 1 at the same time. At this time, the outer fixed tube 42 is stably sleeved on the outside of the sampling probe 2, which not only cooperates with the reinforcing rib plate 31 to improve the structural strength of the sampling probe 2, but also can block part of the smoke and dust outside the sampling probe 2, reducing the direct impact of smoke and dust on the sampling probe 2, which helps to reduce the phenomenon of wear and breakage of the sampling probe 2.

[0043] The implementation principle of a flue sampling structure in the embodiment of the present application is: by increasing the wall thickness and inner diameter of the sampling probe 2, the sampling probe 2 can have higher wear resistance and impact resistance. In addition, when the sampling host 1 blows dust particles in the sampling probe 2 through the backflush pipe, the larger inner diameter of the sampling probe 2 also helps to reduce the problem of the sampling probe 2 being blocked by dust due to its small inner diameter, and thus making it inconvenient to blow dust particles out of the inner cavity of the sampling probe 2.

[0044] The reinforcing ribs 31 are reinforced on the outside of the sampling probe 2, which helps to improve the overall structural strength and impact resistance of the sampling probe 2. The outer fixing tube 42 is adapted to be mounted on the outside of all reinforcing ribs 31 to further improve the structural strength of the sampling probe 2. In addition, the outer fixing tube 42 can also bear a part of the impact of smoke and dust on the outside of the sampling probe 2, reducing the phenomenon of premature and excessive wear and even breakage of the sampling probe 2 due to frequent impact of dust, which helps to extend the service life of the sampling probe 2.

[0045] Example 2 The difference between Example 2 of the present application and Example 1 is that, referring to Figure 4 The outer protection device 4 also includes an extension mechanism 5 that can be detachably connected to the reinforcement tube to completely cover the sampling probe 2.

[0046] Reference Figure 5 The extension mechanism 5 includes an extension tube 6 and a guide assembly 7, wherein the extension tube 6 can be a tube made of a rare earth alloy, and the extension tube 6 is adapted to fit on the outer wall of all reinforcing rib plates 31. In this embodiment, after the end walls of the extension tube 6 and the outer solid tube 42 are close to each other, the length of the extension tube 6 and the outer solid tube 42 is exactly equal to the length of the sampling probe 2, so as to achieve full coverage outside the sampling probe 2 to form protection.

[0047] Reference Figure 5, the extension protection cylinder 6 is detachably connected through the guiding and rotating assembly 7 and is rotatably installed on the sampling probe 2. In this embodiment, the guiding and rotating assembly 7 can be a disk-type linear motor. Specifically, the guiding and rotating assembly 7 includes a disk main body 71 and a moving end 72. Among them, the disk main body 71 is sleeved on the outer peripheral wall of the outer fixed cylinder 42, and the disk main body 71 is fixed on the outer fixed cylinder 42 through bolts. The moving end 72 is movably installed on the disk main body 71. Under the action of electromagnetic induction, the moving end 72 can continuously move along the extending direction of the disk main body 71, that is, along the circumferential direction of the outer fixed cylinder 42.

[0048] Refer to Figure 5 , an outer connecting plate 61 is integrally formed along the outer circumference of the end wall of the extension protection cylinder 6 close to the outer fixed cylinder 42. The side wall of the outer connecting plate 61 facing the sampling main machine 1 and the end wall of the extension protection cylinder 6 facing the sampling main machine 1 are coplanar. A connecting assembly 8 is also jointly arranged between the outer connecting plate 61 and the moving end 72. After the extension protection cylinder 6 is sleeved on all the reinforcing rib plates 31 and abuts against the reinforcement cylinder, the outer connecting plate 61 can be detachably and fixedly connected to the moving end 72 through the connecting assembly 8.

[0049] Refer to Figure 5 , the connecting assembly 8 includes a connecting screw rod 81, a tightening spring 82 and a locking nut 83. Among them, the tightening spring 82 can be a compression spring made of rare earth alloy, and the tightening spring 82 is sleeved on the connecting screw rod 81. The connecting screw rod 81 is vertically welded on the side wall of the moving end 72 away from the disk main body 71. After the extension protection cylinder 6 abuts against the reinforcement cylinder, one end of the connecting screw rod 81 close to the outer connecting plate 61 can pass through a preset through hole on the outer connecting plate 61, and the tightening spring 82 deforms and abuts between the outer connecting plate 61 and the moving end 72 in a compressed state.

[0050] Refer to Figure 5 , the locking nut 83 can be screwed tightly on the connecting screw rod 81 to make the tightening spring 82 tensioned between the outer connecting plate 61 and the moving end 72. As the moving end 72 moves along the outer circumference of the outer fixed cylinder 42, the extension protection cylinder 6 can rotate synchronously along the circumferential direction of the sampling probe 2. Then, by continuously rotating the extension protection cylinder 6, the highly flowing soot is not easily concentrated on and worn at specific or local positions of the extension protection cylinder 6, enabling the extension protection cylinder 6 to receive the impact of the soot at all parts, thereby reducing the problems of excessive local impact and wear and fracture of the extension protection cylinder 6.

[0051] Refer to Figure 6 , a plurality of embedded grooves 62 are arranged on the outer wall of the extension protection cylinder 6. In this embodiment, the number of the embedded grooves 62 can be three. The three embedded grooves 62 are spaced and equally distributed along the circumferential direction of the extension protection cylinder 6, and each embedded groove 62 extends along the length direction of the extension protection cylinder 6.

[0052] Refer to Figure 7, a set of main rotation units 63 are arranged inside the side walls of each embedded slot 62, and multiple groups of main control units 64 are arranged on the main rotation units 63 at intervals and equidistantly along their lengths.

[0053] Referring to Figure 7 and Figure 8 , specifically, the main rotation unit 63 includes a driving motor 631, a connecting seat 632 and a connecting rod 633.

[0054] Referring to Figure 7 and Figure 8 , wherein, the connecting seat 632 can be a bearing seat, both the connecting seat 632 and the driving motor 631 are fixed to the inner bottom wall of the embedded slot 62 by bolts, and the driving motor 631 and the connecting seat 632 are respectively located at both ends of the embedded slot 62 in the length direction. The connecting rod 633 can be a solid steel rod, one end of the connecting rod 633 in the length direction is coaxially connected to the output end of the driving motor 631 through a flange, and the other end of the connecting rod 633 in the length direction is inserted into the connecting seat 632. After the driving motor 631 rotates the output end, the connecting rod 633 can rotate synchronously with the output end of the driving motor 631.

[0055] Referring to Figure 9 , all the main control units 64 are detachably installed on the connecting rod 633. Each group of main control units 64 includes two arc-shaped plates 641, a shock-resistant steel plate 642 and a dust-guiding steel plate 643. In this embodiment, the two arc-shaped plates 641 can be symmetrically and fittingly sleeved on the connecting rod 633. After the two arc-shaped plates 641 are fittingly sleeved on the connecting rod 633 to form an assembly, the arc-shaped plates 641 can be fixed to the connecting rod 633 by bolts.

[0056] Referring to Figure 9 , both the shock-resistant steel plate 642 and the dust-guiding steel plate 643 are rare-earth alloys. The shock-resistant steel plate 642 and the dust-guiding steel plate 643 are respectively welded to the two arc-shaped plates 641 that can be assembled, and the shock-resistant steel plate 642 and the dust-guiding steel plate 643 are respectively located at both radial ends of the connecting rod 633. Both the shock-resistant steel plate 642 and the dust-guiding steel plate 643 are used to receive the impact of dust. During the rotation of the connecting rod 633, the rotating shock-resistant steel plate 642 and dust-guiding steel plate 643 can strike the high-speed flowing dust at a certain speed to reduce the impact of the high-speed flowing dust on the extension protection cylinder 6 and push the dust out of the embedded slot 62. In addition, the rotating extension protection cylinder 6 can also ensure that the embedded slot 62 can have the slot opening downward, so that the dust can fall off the embedded slot 62 under the action of gravity.

[0057] Referring to Figure 9, one end of the dust guide steel plate 643 away from the impact-resistant steel plate 642 is provided with an arc surface 6431, and the arc surface 6431 is adapted to the inner cavity of the embedded groove 62. In this embodiment, there is a gap between the impact-resistant steel plate 642 and the side wall of the embedded groove 62. The length dimension of the dust guide steel plate 643 is greater than that of the impact-resistant steel plate 642, but there is still a gap between the end of the dust guide steel plate 643 provided with the arc surface 6431 and the embedded groove 62. During the rotation of the connecting rod 633, due to the different length dimensions of the impact-resistant steel plate 642 and the dust guide steel plate 643, the continuously rotating impact-resistant steel plate 642 and dust guide steel plate 643 can disturb the air around the embedded groove 62, causing the flow trajectory of some directly impacting soot to be disturbed by the air flow and deviate, thereby reducing the phenomenon of direct impact on the extension protection cylinder 6. In addition, while the dust guide steel plate 643 with a larger length dimension has a gap with the side wall of the embedded groove 62, it can also sweep out as much soot in the embedded groove 62 as possible to reduce the accumulation of soot in the embedded groove 62, thereby helping to reduce the problem that dust accumulates on the inner wall of the embedded groove 62 under high and low temperature differences and forms corrosive and difficult-to-remove impurities.

[0058] Refer to Figure 6 and Figure 7 , in order to accelerate the speed of the dust away from the extension protection cylinder 6, a relief opening 621 is further provided on one side of the inner cavity of the embedded groove 62 of the extension protection cylinder 6. The relief opening 621 makes the opening space of the slot opening of the embedded groove 62 larger on one side, which is more conducive to accelerating the speed of the dust escaping outward through the slot opening of the embedded groove 62 during the rotation of the connecting rod 633.

[0059] The implementation principle of a flue sampling structure in an embodiment of the present application is: when the sampling probe 2 extends into the flue for sampling, the extension protection cylinder 6 can be strengthened outside the sampling probe 2 and receive the direct impact of the soot, so as to protect the sampling probe 2.

[0060] Moreover, the rotating output end of the driving motor 631 drives the connecting rod 633 to rotate. During the rotation of the connecting rod 633, the impact-resistant steel plate 642 and the dust guide steel plate 643 rotate accordingly to form a wind force with a disturbed air flow change at the embedded groove 62, thereby enabling some soot to change its running trajectory and reducing the phenomenon of the soot directly impacting the extension protection cylinder 6. In addition, the impact-resistant steel plate 642 and the dust guide steel plate 643 can receive the impact of the soot, reducing the phenomenon that the soot directly impacts the extension protection cylinder 6 and delaying the wear or even fracture of the extension protection cylinder 6. The impact-resistant steel plate 642 and the dust guide steel plate 643 can also counter-strike the high-speed moving soot during the rotation process, truncating the high-speed moving state of the soot in the air in a physical strike manner to further reduce the phenomenon of the soot directly impacting the extension protection cylinder 6.

[0061] In the process of the impact-resistant steel plate 642 and the dust-guiding steel plate 643 blocking the smoke, the mobile end 72 can move on the disc body 71 along the circumference of the outer fixed tube 42. In this process, the extension tube 6 can rotate along the circumference of the sampling probe 2, so that different positions of the extension tube 6 can bear the impact of the smoke respectively, reducing the phenomenon of excessive wear or even breakage caused by the continuous impact of the smoke at a specific position of the extension tube 6. In addition, the rotating extension tube 6 can also make the smoke in the embedded groove 62 escape from the embedded groove 62 under the action of gravity, reducing the problem of smoke accumulation in the embedded groove 62.

[0062] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A flue sampling structure, comprising a sampling host (1) and a sampling probe (2) arranged on the sampling host (1), characterized in that: The inner diameter of the sampling probe (2) is at least 20 mm, and the wall thickness of the sampling probe (2) is at least 8 mm; the outer wall of the sampling probe (2) is provided with a plurality of groups of reinforcement devices (3) for reinforcing the sampling probe (2); the outer wall of the sampling probe (2) is also provided with an outer protective device (4) surrounding all the reinforcement devices (3); the length of the outer protective device (4) is less than or equal to the length of the sampling probe (2).

2. The flue sampling structure according to claim 1, characterized in that: A plurality of groups of the reinforcement devices (3) are spaced apart and evenly distributed along the circumference of the sampling probe (2); each group of the reinforcement devices (3) comprises a reinforcement rib plate (31), the reinforcement rib plate (31) is welded to the outer wall of the sampling probe (2), and the reinforcement rib plate (31) extends along the length direction of the sampling probe (2) and is equal in length to the sampling probe (2).

3. The flue sampling structure according to claim 2, characterized in that: A plurality of heat dissipation channels (311) for dissipating heat are provided through each of the reinforcing rib plates (31), and all of the heat dissipation channels (311) are distributed at intervals along the length direction of the reinforcing rib plates (31).

4. The flue sampling structure according to claim 2, characterized in that: The outer protection device (4) comprises a first flange (41) fixed to one end of the sampling probe (2), an outer fixed tube (42) adapted to be mounted on the outer walls of all the reinforcing rib plates (31), a second flange (43) fixed to one end of the outer fixed tube (42), and two asbestos gaskets (44) corresponding to the first flange (41) and the second flange (43); The length of the outer fixed tube (42) is smaller than the length of the sampling probe (2); one asbestos gasket (44) is arranged between the first flange (41) and the second flange (43), and another asbestos gasket (44) is arranged between the second flange (43) and the sampling host (1); the first flange (41), the second flange (43) and the sampling box are abutted against each other and fixedly connected by bolts.

5. The flue sampling structure according to claim 4, characterized in that: The outer protection device (4) further comprises a protection extension mechanism (5) which can be detachably connected to the reinforcement tube, and the protection extension mechanism (5) comprises: The extension tube (6) is adapted to be mounted on the outer wall of all the reinforcing rib plates (31), and after the extension tube (6) and the reinforcing tube are butted against each other, the length dimension of the extension tube (6) and the reinforcing tube as a whole is equal to the length dimension of the sampling probe (2); the outer wall of the extension tube (6) is provided with a plurality of embedded grooves (62) along its circumference, each of the embedded grooves (62) is provided with a main rotating unit (63), and the main rotating unit (63) is provided with a plurality of groups of main control units (64); the main rotating unit (63) can rotate in the embedded groove (62), and the plurality of groups of main control units (64) rotating with the main rotating unit (63) can block the impact of smoke and dust during the rotation process, and can push the smoke and dust out of the embedded groove (62); The guide assembly (7) is arranged on the outer wall of the reinforcement tube and can be detachably connected to the extension tube (6); after the guide assembly (7) is fixedly connected to the extension tube (6), the guide assembly (7) can drive the extension tube (6) to rotate along the circumference of the sampling probe (2) to block the impact of smoke and dust and push the smoke and dust out of the embedded groove (62).

6. The flue sampling structure according to claim 5, characterized in that: Each group of the main rotating units (63) comprises: A driving motor (631) is arranged in a side wall of the embedded groove (62) and is located at one end of the embedded groove (62) in the length direction; A connecting seat (632) is arranged in the side wall of the embedded groove (62) and is located at the other end of the embedded groove (62) in the length direction; A connecting rod (633), one end of which is fixedly connected to the output end of the driving motor (631), and the other end of which is inserted into the connecting seat (632); All the main control units (64) are detachably mounted on the connecting rod (633), and all the main control units (64) are spaced and evenly distributed along the length direction of the connecting rod (633); after the connecting rod (633) follows the output end of the driving motor (631) to rotate, all the main control units (64) can follow the rotation in the embedded groove (62).

7. The flue sampling structure according to claim 6, characterized in that: Each group of the main control units (64) comprises: Two arc-shaped plates (641) that can be adapted to be mounted on the outer wall of the connecting rod (633) and are spliced ​​to each other, each of the arc-shaped plates (641) being detachably connected to the connecting rod (633) via bolts; An impact-resistant steel plate (642) is arranged on the outer wall of one of the arc-shaped plates (641), and a gap is left between the impact-resistant steel plate (642) and the side wall of the embedded groove (62); the impact-resistant steel plate (642) is used to bear the impact of the smoke in the flow, and when the impact-resistant steel plate (642) rotates with the connecting rod (633), the impact-resistant steel plate (642) can counter-impact the smoke to push the smoke out of the embedded groove (62); The dust guiding steel plate (643) is arranged on the outer wall of another arc-shaped plate (641), and the dust guiding steel plate (643) and the impact-resistant steel plate (642) are respectively located at the radial ends of the connecting rod (633); the length dimension of the dust guiding steel plate (643) is greater than the length dimension of the impact-resistant steel plate (642), and the end of the dust guiding steel plate (643) away from the arc-shaped plate (641) is configured as an arc-shaped surface (6431) adapted to the inner cavity of the embedded groove (62), and the dust guiding steel plate (643) is close to but not against the side wall of the embedded groove (62) through the arc-shaped surface (6431) to push the smoke and dust on the inner bottom wall of the embedded groove (62).

8. The flue sampling structure according to claim 7, characterized in that: The embedded groove (62) is also provided with a clearance opening (621) on one side of its inner cavity, which allows smoke and dust to escape from the embedded groove (62).

9. The flue sampling structure according to claim 5, characterized in that: The guide assembly (7) is a disc-type linear motor, which comprises a disc body (71) fixed on the outer fixed cylinder (42) and a movable end (72) movably arranged on the disc body (71) and capable of moving along the circumferential direction of the outer fixed cylinder (42); an outer connecting ring plate (61) is also arranged on the outer peripheral wall of the extension cylinder (6) and at one end close to the outer fixed cylinder (42), and the outer connecting ring plate (61) is detachably connected to the movable end (72) through a connecting unit.

10. The flue sampling structure according to claim 9, characterized in that: The connecting unit comprises a connecting screw (81), a clamping spring (82) and a locking nut (83); the connecting screw (81) is vertically fixed on the side wall of the movable end (72), and the clamping spring (82) is sleeved on the connecting screw (81); after the end of the connecting screw (81) away from the movable end (72) passes through the outer connecting ring plate (61), the locking nut (83) is threadedly connected to the connecting screw (81) and causes the clamping spring (82) to be tensioned between the movable end (72) and the outer connecting ring plate (61).

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