Flue gas sampling tube assembly

Abstract

The utility model discloses a flue gas sampling tube subassembly, include: a plurality of in length direction order connection's pipe body, two adjacent pipe body can be dismantled and are connected, be equipped with the sampling hole on the pipe body, the pipe body of being located first end is the beginning pipe, the pipe body of being located second end is the end pipe, the pipe body of being connected in the beginning pipe and the end pipe is the intermediate pipe, first sealing pipe, at first position, first sealing pipe is fixed on the intermediate pipe, and first sealing pipe and intermediate pipe one to one correspond, at second position, first sealing pipe covers the sampling hole on the adjacent pipe body, second sealing pipe, at third position, second sealing pipe is fixed on the end pipe, at fourth position, second sealing pipe covers the sampling hole on the adjacent intermediate pipe. According to the flue gas sampling tube subassembly of the utility model, the length of flue gas sampling tube subassembly can be adjusted, and the sampling hole on the beginning pipe and the intermediate pipe can be selectively opened, so that more detection environment can be adapted, and more detection needs can be satisfied.

Description

Technical Field

[0001] This utility model relates to the field of flue gas sampling technology, and in particular to a flue gas sampling tube assembly. Background Technology

[0002] In power plant boiler performance testing, it is often necessary to insert flue gas sampling tubes into the detection holes of the boiler or flue to collect flue gas samples for analysis. The relative positions of the sampling points and detection holes may differ in different locations of the boiler and flue, or in different boilers and flues, thus leading to different testing requirements. Among related technologies, flue gas sampling tubes can meet relatively few testing requirements. Utility Model Content

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention provides a flue gas sampling tube assembly that can adapt to more detection environments and meet more detection needs.

[0004] According to the present invention, a flue gas sampling tube assembly includes: a plurality of tubes connected sequentially along the length direction, adjacent two tubes being detachably connected; the flue gas sampling tube assembly has a first end and a second end at its two ends along the length direction; each tube is provided with a sampling hole, the sampling hole being located near the end of the tube facing the second end; the tube at the first end is a starting tube, the tube at the second end is a ending tube, and the tube connecting the starting tube and the ending tube is an intermediate tube; a first sealing tube, the first sealing tube being movably sleeved on the flue gas sampling tube assembly between a first position and a second position along the length direction; at the first position, the first sealing tube is fixed to the... On the intermediate tube, the first sealing tube corresponds one-to-one with the intermediate tube. In the second position, the end of the first sealing tube facing the first end is connected to the tube body adjacent to the intermediate tube facing the first end, and the first sealing tube covers the sampling hole on the adjacent tube body. The second sealing tube is movably sleeved on the flue gas sampling tube assembly between the third and fourth positions along the length direction. In the third position, the second sealing tube is fixed to the end tube. In the fourth position, the end of the second sealing tube facing the first end is connected to the intermediate tube adjacent to the end tube, and the second sealing tube covers the sampling hole on the adjacent intermediate tube.

[0005] According to the present invention, the flue gas sampling tube assembly is detachably connected by two adjacent tubes. During use, the number of intermediate tubes can be adjusted according to the size of the furnace or flue to be tested, so that the length of the flue gas sampling tube assembly is adapted to the size of the furnace or flue to be tested. The opening and closing state of the sampling holes on the initiating tube and intermediate tubes can be adjusted by the first sealing tube and the second sealing tube, so that flue gas can be sampled at different positions along the length of the flue gas sampling tube assembly. Furthermore, the opening and closing state of the sampling holes on the initiating tube and intermediate tubes can be adjusted by moving the first sealing tube and the second sealing tube between two positions. The adjustment operation is relatively convenient. Therefore, the flue gas sampling device can be adapted to more testing environments and meet more testing needs.

[0006] According to some embodiments of the present invention, a first threaded segment is formed on the outer peripheral wall of the intermediate tube, and a second threaded segment is formed on the inner peripheral wall of the end of the first sealing tube facing the second end. At the first position, the first threaded segment and the second threaded segment are threadedly connected.

[0007] According to some embodiments of the present invention, a third threaded segment is formed on the pipe body adjacent to the first end of the intermediate tube, the third threaded segment is provided on the side of the sampling hole on the pipe body facing the first end, and a fourth threaded segment is formed on the inner peripheral wall of the end of the first sealing tube facing the first end. In the second position, the third threaded segment and the fourth threaded segment are threadedly connected.

[0008] According to some embodiments of the present invention, a first sealing element is further provided on the inner peripheral wall of the first sealing tube. The first sealing element protrudes from the fourth threaded section and is located on the side of the fourth threaded section facing the second end. In the second position, the first sealing element seals against the periphery of the sampling hole on the tube body adjacent to the first end of the intermediate tube.

[0009] According to some embodiments of the present invention, a fifth threaded segment is formed on the outer peripheral wall of the end tube, and a sixth threaded segment is formed on the inner peripheral wall of the end of the second sealing tube facing the second end. At the third position, the fifth threaded segment and the sixth threaded segment are threadedly connected.

[0010] According to some embodiments of the present invention, a seventh threaded segment is formed on the intermediate tube adjacent to the end tube, the sampling hole on the intermediate tube is provided on the side of the seventh threaded segment facing the first end, and an eighth threaded segment is formed on the inner peripheral wall of the end of the second sealing tube facing the first end. At the fourth position, the seventh threaded segment and the eighth threaded segment are threadedly connected.

[0011] According to some embodiments of the present invention, a second sealing element is further provided on the inner peripheral wall of the second sealing tube. The second sealing element protrudes from the eighth threaded section and is located on the side of the eighth threaded section facing the second end. In the fourth position, the second sealing element seals against the periphery of the sampling hole on the intermediate tube adjacent to the end tube.

[0012] According to some embodiments of the present invention, two adjacent pipe bodies are respectively a first pipe body and a second pipe body. A ninth threaded segment and a sealing groove are formed on the outer peripheral wall of one end of the first pipe body, and a tenth threaded segment is formed on the inner peripheral wall of one end of the second pipe body. The ninth threaded segment and the tenth threaded segment are threadedly connected. The sealing groove is located on the side of the ninth threaded segment away from the second pipe body. A sealing ring is provided in the sealing groove, and the sealing ring seals and abuts against the inner peripheral wall of the second pipe body and the inner wall of the sealing groove.

[0013] According to some embodiments of the present invention, a first support and a second support are further provided on the outer peripheral wall of the opening tube. One end of the first support and one end of the second support are fixedly connected to the outer peripheral wall of the opening tube, and the first support and the second support are arranged at intervals.

[0014] According to some embodiments of the present invention, the first bracket also forms a receiving groove on one side of the circumferential direction of the opening tube, and the opening tube is also provided with a blocking member. One end of the blocking member is provided with a pull button, and one end of the blocking member is connected to the inner wall of the receiving groove. The blocking member has a retracted state and an unfolded state. In the retracted state, the blocking member is folded in the receiving groove, and the pull button extends out of the receiving groove. In the unfolded state, the blocking member is an annular ring arranged around the opening tube, and the pull button is stacked with the first bracket.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a flue gas sampling tube assembly according to an embodiment of the present utility model; Figure 2 This is a schematic diagram of the inlet tube according to an embodiment of the present utility model; Figure 3 This is a schematic diagram of the intermediate tube and the first sealing tube according to an embodiment of the present utility model; Figure 4 This is a schematic diagram of the end tube and the second sealing tube according to an embodiment of the present utility model; Figure 5 yes Figure 2A schematic diagram of another angle of the inlet tube shown; Figure 6 This is a schematic diagram of the initiator tube according to another embodiment of the present invention.

[0017] Figure label: 100. Flue gas sampling tube assembly; 110. First end; 120. Second end; 10. Sampling hole; 20. Initiating pipe; 21. Third threaded section; 30. End tube; 31. Fifth threaded section; 40. Intermediate pipe; 41. First threaded section; 42. Seventh threaded section; 50. First sealing tube; 60. Second sealing tube; 70. Ninth thread segment; 80. First bracket; 81. Second bracket; 83. Covering component; 84. Pull button. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0019] The following is for reference. Figures 1-6 Description of flue gas sampling tube assembly 100 according to an embodiment of the present utility model.

[0020] like Figures 1-4 As shown, the flue gas sampling tube assembly 100 according to an embodiment of the present invention includes: a plurality of tubes connected sequentially in the length direction, a first sealing tube 50, and a second sealing tube 60. For example, there may be three, four, or seven tubes.

[0021] Specifically, two adjacent pipe bodies are detachably connected. The flue gas sampling pipe assembly 100 has a first end 110 and a second end 120 at its two ends along its length. A sampling hole 10 is provided on the pipe body, located near the end of the pipe body facing the second end 120. The pipe body located at the first end 110 is the inlet pipe 20, and the pipe body located at the second end 120 is the outlet pipe 30. The pipe body connecting the inlet pipe 20 and the outlet pipe 30 is the intermediate pipe 40. A first sealing pipe 50 is movably sleeved on the flue gas sampling pipe assembly 100 between a first position and a second position along its length. In the first position, the first sealing pipe 50 is fixed to the intermediate pipe 40. The sealing tube 50 corresponds one-to-one with the intermediate tube 40. In the second position, the end of the first sealing tube 50 facing the first end 110 is connected to the tube body adjacent to the intermediate tube 40 in the direction of the first end 110. The first sealing tube 50 covers the sampling hole 10 on the adjacent tube body. The second sealing tube 60 is movably sleeved on the flue gas sampling tube assembly 100 between the third and fourth positions along the length direction. In the third position, the second sealing tube 60 is fixed to the end tube 30. In the fourth position, the end of the second sealing tube 60 facing the first end 110 is connected to the intermediate tube 40 adjacent to the end tube 30. The second sealing tube 60 covers the sampling hole 10 on the adjacent intermediate tube 40.

[0022] The intermediate tube 40 can be one or more. Along the length of the flue gas sampling tube assembly 100, in a first position, both ends of the first sealing tube 50 are located inside the ends of the intermediate tube 40; in a third position, both ends of the second sealing tube 60 are located inside the ends of the end tube 30. A flue gas channel is formed inside the tube body. The end of the end tube 30 furthest from the intermediate tube 40 is sealed. When the sampling port 10 is open, the flue gas entering through the sampling port 10 can be transmitted along the flue gas channel inside the flue gas sampling tube assembly 100 to the flue gas analyzer.

[0023] When there is only one intermediate tube 40, the opening and closing state of the sampling hole 10 on the initiating tube 20 can be adjusted by adjusting the position of the first sealing tube 50. When there are multiple intermediate tubes 40, the first sealing tube 50 on the intermediate tube 40 adjacent to the initiating tube 20 can adjust the opening and closing state of the sampling hole 10 on the initiating tube 20, and the first sealing tube 50 on the remaining intermediate tubes 40 can adjust the opening and closing state of the sampling hole 10 on the intermediate tube 40 adjacent to the first end 110. By adjusting the position of the second sealing tube 60, the opening and closing state of the sampling hole 10 on the intermediate tube 40 adjacent to the end tube 30 can be adjusted.

[0024] During flue gas sampling, the number of intermediate tubes 40 is first adjusted according to the size of the environment to be tested, so that the length of the flue gas sampling component is adapted to the size of the environment to be tested. Then, the opening and closing states of the sampling holes 10 on the initiating tube 20 and the intermediate tube 40 are adjusted according to the sampling position.

[0025] During sampling, portions of the end tube 30, the middle tube 40, and the beginning tube 20 are sequentially inserted into the environment to be tested through the detection hole. The flue gas collected in the environment to be tested can be transferred to the flue gas analysis device through the flue gas channel in the flue gas sampling tube assembly 10 via the sampling holes 10 on the end tube 30, the middle tube 40, and the beginning tube 20, which are in the open state. Thus, flue gas sampling is achieved.

[0026] According to the embodiment of this utility model, the flue gas sampling tube assembly 100 is detachably connected by two adjacent tubes. During use, the number of intermediate tubes 40 can be adjusted according to the size of the furnace or flue to be tested, so that the length of the flue gas sampling tube assembly 100 is adapted to the size of the furnace or flue to be tested. The opening and closing state of the sampling holes 10 on the initiating tube 20 and the intermediate tube 40 can be adjusted by the first sealing tube 50 and the second sealing tube 60, so that flue gas can be sampled at different positions along the length of the flue gas sampling tube assembly 100. Furthermore, the opening and closing state of the sampling holes 10 on the initiating tube 20 and the intermediate tube 40 can be adjusted by moving the first sealing tube 50 and the second sealing tube 60 between two positions. The adjustment operation is relatively convenient. Therefore, the flue gas sampling device can adapt to more detection environments and meet more detection needs.

[0027] In some embodiments of this utility model, such as Figure 1 and Figure 3 As shown, a first threaded section 41 is formed on the outer peripheral wall of the intermediate tube 40, and a second threaded section is formed on the inner peripheral wall of the end of the first sealing tube 50 facing the second end 120. In the first position, the first threaded section 41 and the second threaded section are threadedly connected.

[0028] When the first sealing tube 50 is in the first position, rotate the first sealing tube 50 to disengage the first threaded section 41 and the second threaded section, and then push the first sealing tube 50 toward the first end 110 so that one end of it toward the first end 110 is connected to the tube body of the intermediate tube 40 adjacent to the first end 110, and the first sealing tube 50 covers the sampling hole 10. In this way, the first sealing tube 50 can be moved from the first position to the second position.

[0029] When the first sealing tube 50 is in the second position, the connection between the first sealing tube 50 and the intermediate tube 40 adjacent to each other in the direction of the first end 110 is released. Then, the first sealing tube 50 is pushed in the direction of the second end 120. When the second threaded section reaches the position of the first threaded section 41, the first sealing tube 50 is rotated so that the first threaded section 41 is threadedly connected to the second threaded section. In this way, the first sealing tube 50 can be moved from the second position to the first position.

[0030] By connecting the intermediate tube 40 and the first sealing tube 50 by threads, a detachable connection between the intermediate tube 40 and the first sealing tube 50 can be achieved, allowing the first sealing tube 50 to move normally between the first position and the second position. Furthermore, the threaded connection is simple to operate and has high connection reliability.

[0031] In some embodiments of this utility model, such as Figures 1-3 As shown, a third threaded section 21 is formed on the pipe body adjacent to the first end 110 of the intermediate pipe 40. The sampling hole 10 on the pipe body of the third threaded section 21 is located on the side facing the first end 110. A fourth threaded section is formed on the inner circumferential wall of the first sealing pipe 50 facing the first end 110. In the second position, the third threaded section 21 and the fourth threaded section are threadedly connected.

[0032] When the first sealing tube 50 is in the first position, rotating the first sealing tube 50 disengages the first threaded section 41 and the second threaded section. Then, pushing the first sealing tube 50 towards the first end 110 moves its end towards the first end 110 to the tube body adjacent to the intermediate tube 40 in the direction towards the first end 110. Then, rotating the first sealing tube 50 causes the third threaded section 21 to connect with the fourth threaded section. This allows the first sealing tube 50 to move from the first position to the second position. After the third threaded section 21 connects with the fourth threaded section, the first sealing tube 50 can seal the sampling hole 10, and the third threaded section 21 and the fourth threaded section can improve the sealing between the first sealing tube 50 and the tube body.

[0033] When the first sealing tube 50 is in the second position, rotate the first sealing tube 50 to disengage the third threaded section 21 from the fourth threaded section, and then push the first sealing tube 50 toward the second end 120. When the second threaded section reaches the position of the first threaded section 41, rotate the first sealing tube 50 to thread the first threaded section 41 with the second threaded section. In this way, the first sealing tube 50 can be moved from the second position to the first position.

[0034] By connecting the intermediate tube 40 to the adjacent tube body and the first sealing tube 50 by threads, a detachable connection between the tube body and the first sealing tube 50 can be achieved, allowing the first sealing tube 50 to move normally between the first and second positions. The threaded connection is simple to operate and has high reliability. In addition, the third threaded section 21 and the fourth threaded section can improve the sealing performance between the first sealing tube 50 and the tube body.

[0035] In some embodiments of this utility model, a first sealing element is also provided on the inner peripheral wall of the first sealing tube 50. The first sealing element protrudes from the fourth threaded section and is located on the side of the fourth threaded section facing the second end 120. In the second position, the first sealing element seals against the periphery of the sampling hole 10 on the tube body adjacent to the first end 110 of the intermediate tube 40.

[0036] The first sealing element is embedded in the inner circumferential wall of the first sealing tube 50. The first sealing element is made of ceramic fiber or expanded graphite material, so the first sealing element has a certain degree of flexibility. During the process of gradually tightening the third threaded section 21 and the fourth threaded section, the first sealing element gradually seals and abuts against the periphery of the sampling hole 10 under the action of the first sealing tube 50. Thus, there are two seals between the first sealing tube 50 and the tube body: the third threaded section 21, the second threaded section, and the first sealing element, which can further improve the sealing performance between the first sealing tube 50 and the tube body.

[0037] In some embodiments of this utility model, such as Figure 1 and Figure 4 As shown, a fifth threaded section 31 is formed on the outer peripheral wall of the end tube 30, and a sixth threaded section is formed on the inner peripheral wall of the end of the second sealing tube 60 facing the second end 120. In the third position, the fifth threaded section 31 and the sixth threaded section are threadedly connected.

[0038] When the second sealing tube 60 is in the third position, rotate the second sealing tube 60 to disengage the fifth threaded section 31 and the sixth threaded section, and then push the second sealing tube 60 toward the first end 110 so that one end toward the first end 110 is connected to the intermediate tube 40 adjacent to the end tube 30, and the second sealing tube 60 covers the sampling hole 10. In this way, the second sealing tube 60 can be moved from the third position to the fourth position.

[0039] When the second sealing tube 60 is in the fourth position, disconnect the connection between the second sealing tube 60 and the intermediate tube 40 adjacent to the end tube 30, and then push the second sealing tube 60 toward the second end 120. When the sixth threaded section reaches the position of the fifth threaded section 31, rotate the second sealing tube 60 to make the fifth threaded section 31 threadedly connected to the sixth threaded section. In this way, the second sealing tube 60 can be moved from the fourth position to the third position.

[0040] By connecting the end tube 30 and the second sealing tube 60 by threads, the end tube 30 and the second sealing tube 60 can be detachably connected, so that the second sealing tube 60 can move normally between the third position and the fourth position. The threaded connection is simple to operate and has high connection reliability.

[0041] In some embodiments of this utility model, such as Figure 1 , Figure 3 and Figure 4 As shown, a seventh threaded segment 42 is formed on the intermediate tube 40 adjacent to the end tube 30. The seventh threaded segment 42 is provided on the side of the sampling hole 10 on the intermediate tube 40 facing the first end 110. An eighth threaded segment is formed on the inner peripheral wall of the end of the second sealing tube 60 facing the first end 110. In the fourth position, the seventh threaded segment 42 and the eighth threaded segment are threadedly connected.

[0042] When the second sealing tube 60 is in the third position, rotate the second sealing tube 60 to disengage the fifth threaded section 31 and the sixth threaded section. Then, push the second sealing tube 60 towards the first end 110, moving its end towards the first end 110 to the intermediate tube 40 adjacent to the end tube 30. Then, rotate the second sealing tube 60 to thread the seventh threaded section 42 and the eighth threaded section together. This allows the second sealing tube 60 to move from the third position to the fourth position. After the seventh threaded section 42 and the eighth threaded section are connected, the second sealing tube 60 can seal the sampling hole 10, and the seventh threaded section 42 and the eighth threaded section can improve the sealing between the second sealing tube 60 and the intermediate tube 40.

[0043] When the second sealing tube 60 is in the fourth position, rotate the second sealing tube 60 to disengage the seventh threaded section 42 from the eighth threaded section, and then push the second sealing tube 60 toward the second end 120. When the sixth threaded section reaches the position of the fifth threaded section 31, rotate the second sealing tube 60 to thread the fifth threaded section 31 with the sixth threaded section. In this way, the second sealing tube 60 can be moved from the fourth position to the third position.

[0044] The intermediate tube 40 and the second sealing tube 60 are connected by threads, which allows the intermediate tube 40 and the second sealing tube 60 to be detachably connected. This allows the second sealing tube 60 to move normally between the third and fourth positions. The threaded connection is simple to operate and has high reliability. In addition, the seventh threaded section 42 and the eighth threaded section can improve the sealing performance between the second sealing tube 60 and the intermediate tube 40.

[0045] In some embodiments of this utility model, a second sealing element is also provided on the inner peripheral wall of the second sealing tube 60. The second sealing element protrudes from the eighth threaded section and is located on the side of the eighth threaded section facing the second end 120. In the fourth position, the second sealing element seals against the periphery of the sampling hole 10 on the intermediate tube 40 adjacent to the end tube 30.

[0046] The second sealing element is embedded in the inner circumferential wall of the second sealing tube 60. The second sealing element is made of ceramic fiber or expanded graphite material, so the second sealing element has a certain degree of flexibility. During the process of gradually tightening the seventh thread section 42 and the eighth thread section, the second sealing element gradually seals and abuts against the periphery of the sampling hole 10 under the action of the second sealing tube 60. Thus, there are two seals between the second sealing tube 60 and the intermediate tube 40: the seventh thread section 42 and the eighth thread section, and the first sealing element. This can further improve the sealing performance between the second sealing tube 60 and the intermediate tube 40.

[0047] In some embodiments of this utility model, such as Figure 3 and Figure 4 As shown, two adjacent pipes are a first pipe and a second pipe. A ninth threaded segment 70 and a sealing groove are formed on the outer peripheral wall of one end of the first pipe. A tenth threaded segment is formed on the inner peripheral wall of one end of the second pipe. The ninth threaded segment 70 and the tenth threaded segment are threadedly connected. The sealing groove is located on the side of the ninth threaded segment 70 away from the second pipe. A sealing ring is provided in the sealing groove. The sealing ring seals and abuts against the inner peripheral wall of the second pipe and the inner wall of the sealing groove.

[0048] In other words, adjacent pipe bodies are connected by threads, allowing for a detachable connection that is convenient and reliable. The use of a sealing ring further enhances the seal between adjacent pipe bodies. Preferably, the sealing ring is made of fluororubber.

[0049] In some embodiments of this utility model, such as Figure 1 , Figure 5 and Figure 6 As shown, a first support 80 and a second support 81 are also provided on the outer peripheral wall of the initiator tube 20. One end of the first support 80 and one end of the second support 81 are fixedly connected to the outer peripheral wall of the initiator tube 20. The first support 80 and the second support 81 are arranged at intervals.

[0050] During flue gas sampling, as the flue gas sampling tube assembly 100 extends into the detection hole, when the first support 80 and the second support 81 abut against the edge of the detection hole, the first support 80 and the second support 81 can prevent the flue gas sampling tube assembly 100 from extending further. Thus, the flue gas sampling tube assembly 100 can be positioned and limited during the sampling process, thereby reducing the operational difficulty during the sampling process.

[0051] In some embodiments of this utility model, such as Figure 1 , Figure 5 and Figure 6 As shown, the first support 80 also forms a receiving groove on one side of the opening tube 20 in the circumferential direction. The opening tube 20 is also provided with a blocking member 83. One end of the blocking member 83 is provided with a pull button 84. One end of the blocking member 83 is connected to the inner wall of the receiving groove. The blocking member 83 has a retracted state and an unfolded state. In the retracted state, the blocking member 83 is folded in the receiving groove and the pull button 84 extends out of the receiving groove. In the unfolded state, the blocking member 83 is a ring arranged around the opening tube 20. The pull button 84 is stacked with the first support 80.

[0052] When flue gas sampling is required, pull the button 84 and move it around the inlet tube 20. During the movement of the button 84, the blocking member 83 gradually unfolds around the circumference of the inlet tube 20. After the button 84 has circled the inlet tube 20 once, the button 84 is fixed on the first bracket 80, and the blocking member 83 forms a ring around the inlet tube 20. In this way, after the flue gas sampling tube assembly 100 is inserted into the detection hole, when the first bracket 80 and the second bracket 81 abut against the edge of the detection hole, the blocking member 83 can block the detection hole, thereby preventing the flue gas from flowing out of the detection hole.

[0053] During its movement, the pull button 84 causes the blocking member 83 to avoid the second bracket 81. After the blocking member 83 is deployed, the second bracket 81 can provide support for the blocking member 83. Preferably, the blocking member 83 is a corrugated pipe.

[0054] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0055] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0056] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0057] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0058] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A flue gas sampling tube assembly, characterized in that, include: Multiple tubes are connected sequentially along their length, and two adjacent tubes are detachably connected. The flue gas sampling tube assembly has a first end and a second end at its two ends along its length. Each tube is provided with a sampling hole, which is located near the end of the tube facing the second end. The tube at the first end is the inlet tube, the tube at the second end is the outlet tube, and the tube connecting the inlet tube and the outlet tube is the middle tube. A first sealing tube is movably sleeved on the flue gas sampling tube assembly between a first position and a second position along its length. In the first position, the first sealing tube is fixed to the intermediate tube, and the first sealing tube corresponds one-to-one with the intermediate tube. In the second position, one end of the first sealing tube facing the first end is connected to the tube body adjacent to the intermediate tube facing the first end, and the first sealing tube covers the sampling hole on the adjacent tube body. The second sealing tube is movably sleeved on the flue gas sampling tube assembly between a third position and a fourth position along its length. In the third position, the second sealing tube is fixed to the end tube. In the fourth position, one end of the second sealing tube facing the first end is connected to the intermediate tube adjacent to the end tube, and the second sealing tube covers the sampling hole on the adjacent intermediate tube.

2. The flue gas sampling tube assembly according to claim 1, characterized in that, A first threaded segment is formed on the outer peripheral wall of the intermediate tube, and a second threaded segment is formed on the inner peripheral wall of the end of the first sealing tube facing the second end. At the first position, the first threaded segment and the second threaded segment are threadedly connected.

3. The flue gas sampling tube assembly according to claim 2, characterized in that, A third threaded segment is formed on the pipe body adjacent to the first end of the intermediate tube. The sampling hole on the pipe body is located on the side of the third threaded segment facing the first end. A fourth threaded segment is formed on the inner circumferential wall of the end of the first sealing tube facing the first end. At the second position, the third threaded segment and the fourth threaded segment are threadedly connected.

4. The flue gas sampling tube assembly according to claim 3, characterized in that, The inner circumferential wall of the first sealing tube is also provided with a first sealing element. The first sealing element protrudes from the fourth threaded section and is located on the side of the fourth threaded section facing the second end. In the second position, the first sealing element seals against the periphery of the sampling hole on the tube body adjacent to the first end of the intermediate tube.

5. The flue gas sampling tube assembly according to claim 1, characterized in that, A fifth threaded segment is formed on the outer peripheral wall of the end tube, and a sixth threaded segment is formed on the inner peripheral wall of the end of the second sealing tube facing the second end. At the third position, the fifth threaded segment and the sixth threaded segment are threadedly connected.

6. The flue gas sampling tube assembly according to claim 5, characterized in that, A seventh threaded segment is formed on the intermediate tube adjacent to the end tube. The sampling hole on the intermediate tube is located on the side of the seventh threaded segment facing the first end. An eighth threaded segment is formed on the inner circumferential wall of the end of the second sealing tube facing the first end. At the fourth position, the seventh threaded segment and the eighth threaded segment are threadedly connected.

7. The flue gas sampling tube assembly according to claim 6, characterized in that, The inner circumferential wall of the second sealing tube is also provided with a second sealing element. The second sealing element protrudes from the eighth threaded section and is located on the side of the eighth threaded section facing the second end. In the fourth position, the second sealing element seals against the periphery of the sampling hole on the intermediate tube adjacent to the end tube.

8. The flue gas sampling tube assembly according to claim 1, characterized in that, The two adjacent pipes are a first pipe and a second pipe. A ninth threaded segment and a sealing groove are formed on the outer peripheral wall of one end of the first pipe. A tenth threaded segment is formed on the inner peripheral wall of one end of the second pipe. The ninth threaded segment and the tenth threaded segment are threaded together. The sealing groove is located on the side of the ninth threaded segment away from the second pipe. A sealing ring is provided in the sealing groove. The sealing ring seals and abuts against the inner peripheral wall of the second pipe and the inner wall of the sealing groove.

9. The flue gas sampling tube assembly according to claim 1, characterized in that, The outer peripheral wall of the initiator tube is also provided with a first support and a second support. One end of the first support and one end of the second support are fixedly connected to the outer peripheral wall of the initiator tube. The first support and the second support are arranged at intervals.

10. The flue gas sampling tube assembly according to claim 9, characterized in that, The first bracket also forms a receiving groove on one side of the opening tube in the circumferential direction. The opening tube is also provided with a blocking member. One end of the blocking member is provided with a pull button. One end of the blocking member is connected to the inner wall of the receiving groove. The blocking member has a retracted state and an unfolded state. In the retracted state, the blocking member is folded in the receiving groove and the pull button extends out of the receiving groove. In the unfolded state, the blocking member is a ring arranged around the opening tube. The pull button is stacked with the first bracket.

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