Thermal power plant high-temperature flue gas sampling and cooling device

Abstract

The invention relates to the technical field of thermal power plant high-temperature flue gas sampling, in particular to a thermal power plant high-temperature flue gas sampling and cooling device which comprises a collecting barrel, a cooling assembly, a drainage hard pipe, a drainage hose and a buffering assembly, the collecting barrel is used for collecting high-temperature flue gas, and a discharging opening is formed in the bottom of the collecting barrel. The cooling assembly is fixedly installed in the collecting barrel and used for cooling the high-temperature flue gas. The drainage hard pipe is fixedly installed at the top end of the collecting barrel and used for guiding the high-temperature flue gas to flow into the collecting barrel. One end of the drainage hose is connected with the drainage hard tube, and the other end is suitable for being connected with a collection port and used for guiding high-temperature flue gas to flow to the drainage hard tube. And the buffer component is sleeved at the joint of the drainage hose and the drainage hard tube. When the gas flow is large, the buffer assembly can effectively reduce the vibration frequency of the joint of the drainage hard tube and the drainage hose and inhibit the end of the drainage hose from generating small cracks, so that the drainage hose is not easily disconnected from the drainage hard tube, and the stability and efficiency of high-temperature flue gas collection are guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of high-temperature flue gas sampling in thermal power plants, and in particular to a high-temperature flue gas sampling cooling device in thermal power plants. Background Art

[0002] Thermal power plants must strictly comply with air pollutant emission standards and collect and analyze high-temperature flue gas to ensure that it meets the emission standards.

[0003] The traditional high-temperature flue gas sampling and cooling device of a thermal power plant includes a collection tube, a drainage tube and a drainage hose. The drainage tube is fixedly installed on the top of the collection tube. One end of the drainage hose is connected to the drainage tube, and the other end is connected to the collection port. During the sampling process, when the gas flow is large, the connection between the drainage tube and the drainage hose is prone to high-frequency vibration, which can easily cause small cracks at the end of the drainage hose, making it easy for the drainage hose to disconnect from the drainage tube. Summary of the invention

[0004] The invention provides a high-temperature flue gas sampling and cooling device for a thermal power plant, which is used to solve the problem that a drainage hose and a drainage hard pipe are easily disconnected when the gas flow rate is large.

[0005] The present invention provides a high-temperature flue gas sampling and cooling device for a thermal power plant, comprising: A collecting cylinder is used to collect smoke, and a discharge port is formed at the bottom; A cooling assembly is fixedly installed in the collecting tube and is used to cool the flue gas; The drainage hard tube is fixedly installed on the top of the collection tube; A drainage hose, one end of which is connected to the drainage hard tube, and the other end is suitable for connecting to the collection port; The buffer component is sleeved on the connection between the drainage hose and the drainage hard tube.

[0006] In some embodiments, the buffer assembly includes: There are two first clamping seats, which are arranged opposite to each other, and the adjacent sides are respectively formed with clamping grooves, which can move toward each other or move away from each other; when the two first clamping seats move toward each other, a clamping ring can be formed around the outer periphery of the connection between the drainage hose and the drainage hard tube; There are two buffer pads, which are installed in the clamping groove in a one-to-one correspondence with the two first clamping seats and can move with the corresponding first clamping seats; when the two buffer pads move toward each other, a buffer ring can be formed around the outer periphery of the connection between the drainage hose and the drainage hard pipe; There are two elastic connecting members, which are respectively installed on the top of the two first clamping seats, and can connect or disconnect the two first clamping seats.

[0007] In some of the embodiments, a plurality of convex strips are uniformly formed on the inner wall of the buffer ring along the circumferential direction.

[0008] In some embodiments, each elastic connector comprises: A first connecting seat, fixedly mounted on the top of one of the first clamping seats; A second connecting seat, fixedly mounted on the top of another first clamping seat; The plug connector is fixedly mounted on a side of the first connection base close to the second connection base; There are two second clamping seats, one of which is installed on the upper part of the second connecting seat close to the first connecting seat through an upper spring, and the other is installed on the lower part of the second connecting seat close to the first connecting seat through a lower spring; a plug-in groove adapted to the plug connector is formed between the two second clamping seats.

[0009] In some embodiments, it also includes: The stirring mechanism is rotatably mounted on one end of the drainage hard pipe inserted into the collecting tube, and can rotate with the help of the flow of smoke.

[0010] In some embodiments, the stirring mechanism comprises: A rotating ring is rotatably mounted on one end of the drainage tube inserted into the collecting tube; There are multiple blades, which are evenly installed at the bottom of the rotating ring along the circumference of the rotating ring; multiple force-bearing plates are evenly installed on the inner side of each blade along the vertical direction; each force-bearing plate is an arc-shaped structure and is set obliquely.

[0011] In some embodiments, it also includes: The brake mechanism is installed on the top cover of the collecting barrel and can limit the rotation of the rotating ring or release the restriction on the rotating ring.

[0012] In some embodiments, the braking mechanism comprises: A guide ring is fixedly installed in the middle of the top cover, and an internal thread is formed on the inner wall; There are two transmission racks, which are respectively installed in the top cover so as to be able to reciprocate along a straight line, and are both located above the guide ring; one of the transmission racks is fixedly connected to one of the first clamping seats through a first transmission rod, and the other transmission rack is fixedly connected to the other first clamping seat through a second transmission rod; the two transmission racks can move with the corresponding first clamping seats; The gear ring is rotatably mounted in the top cover, and the two opposite sides are respectively meshed and connected with the transmission racks on the corresponding sides; The extrusion ring is installed at the bottom of the gear ring and located inside the guide ring. It can rotate with the gear ring. An external thread matching the internal thread is formed on the outer wall. It can press against the rotating ring or detach from the rotating ring. When the two first clamping seats move toward each other, the two transmission racks are driven to move by the first transmission rod and the second transmission rod, so that the gear ring rotates, and then the extrusion ring is driven to rotate, so that the extrusion ring is separated from the rotating ring, and the restriction on the rotating ring is released; when the two first clamping seats move back to back, the two transmission racks are driven to move by the first transmission rod and the second transmission rod, so that the gear ring rotates, and then the extrusion ring is driven to rotate, so that the extrusion ring is pressed against the outer wall of the rotating ring, and the rotation of the rotating ring is restricted.

[0013] In some embodiments, the cooling assembly includes: There are multiple cooling pipes which are evenly installed inside the side wall of the collecting tube along the circumference of the collecting tube.

[0014] In some embodiments, it also includes: A positioning mounting seat is installed on one side outside the collecting tube; The discharge valve is installed at the bottom of the collection tube.

[0015] The beneficial effects of the present invention are as follows: The high-temperature flue gas sampling and cooling device of the thermal power plant of the present invention is provided with a collecting tube, a cooling assembly, a drainage hard pipe, a drainage hose and a buffer assembly. The collecting tube is used to collect high-temperature flue gas, and a discharge port is formed at the bottom. The cooling assembly is fixedly installed in the collecting tube for cooling the high-temperature flue gas. The drainage hard pipe is fixedly installed at the top of the collecting tube for guiding the high-temperature flue gas to flow into the collecting tube. One end of the drainage hose is connected to the drainage hard pipe, and the other end is suitable for connection with the collection port, for guiding the high-temperature flue gas to flow into the drainage hard pipe. The buffer assembly is sleeved at the connection between the drainage hose and the drainage hard pipe. When the air flow rate is large, the buffer assembly can effectively reduce the vibration frequency at the connection between the drainage hard pipe and the drainage hose, suppress the generation of fine cracks at the end of the drainage hose, make the drainage hose not easy to disconnect from the drainage hard pipe, and ensure the stability and efficiency of high-temperature flue gas collection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of some specific embodiments of a high-temperature flue gas sampling and cooling device for a thermal power plant according to the present invention; Figure 2 yes Figure 1 The internal structure diagram of the high temperature flue gas sampling and cooling device of the thermal power plant shown; Figure 3 yes Figure 1 A partial enlarged view of the middle A area; Figure 4 yes Figure 2 The schematic diagram of the combined structure of the braking mechanism and the stirring mechanism of the high-temperature flue gas sampling and cooling device of a thermal power plant is shown.

[0017] In the accompanying drawings, 110, the collecting tube; 120, the cooling assembly; 130, the drainage hard tube; 140, the drainage hose; 150, the buffer assembly; 151, the first clamping seat; 152, the buffer pad; 153, the elastic connecting piece; 1531, the first connecting seat; 1532, the second connecting seat; 1533, the plug connector; 1534, the second clamping seat; 1535, the upper spring; 160, the stirring mechanism; 161, the rotating ring; 162, the fan blade; 163, the force-bearing sheet; 170, the braking mechanism; 171, the guide ring; 172, the transmission rack; 173, the first transmission rod; 174, the gear ring; 175, the extrusion ring; 180, the positioning mounting seat; 190, the discharge valve. DETAILED DESCRIPTION

[0018] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than 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.

[0019] As described in the background technology, the traditional high-temperature flue gas sampling and cooling device of a thermal power plant includes a collecting tube, a drainage hard tube and a drainage hose. The drainage hard tube is fixedly installed at the top of the collecting tube. One end of the drainage hose is connected to the drainage hard tube, and the other end is connected to the collection port. During the sampling process, when the gas flow rate is large, the connection between the drainage hard tube and the drainage hose is prone to high-frequency vibration, which can easily cause small cracks at the end of the drainage hose, causing the drainage hose to be easily disconnected from the drainage hard tube.

[0020] To solve the above problems, refer to Figure 1 , Figure 2 , Figure 3 and Figure 4The present invention provides a high-temperature flue gas sampling and cooling device for a thermal power plant, comprising a collecting tube 110, a cooling assembly 120, a drainage tube 130, a drainage hose 140 and a buffer assembly 150. The collecting tube 110 is used to collect high-temperature flue gas, and a discharge port is formed at the bottom. The cooling assembly 120 is fixedly installed in the collecting tube 110, and is used to cool the high-temperature flue gas. The drainage tube 130 is fixedly installed at the top of the collecting tube 110, and is used to guide the high-temperature flue gas to flow into the collecting tube 110. One end of the drainage hose 140 is connected to the drainage tube 130, and the other end is suitable for connection with the collection port, and is used to guide the high-temperature flue gas to flow toward the drainage tube 130. The buffer assembly 150 is sleeved at the connection between the drainage hose 140 and the drainage tube 130. When the air flow rate is large, the buffer assembly 150 can effectively reduce the vibration frequency of the connection between the drainage hard tube 130 and the drainage hose 140, inhibit the formation of small cracks at the end of the drainage hose 140, and make the drainage hose 140 not easily disconnected from the drainage hard tube 130, thereby ensuring the stability and efficiency of high-temperature flue gas collection.

[0021] Preferably, the drainage tube 130 is made of a hard material such as steel or copper, and the drainage hose 140 is a retractable bellows to facilitate flexible connection to the collection port.

[0022] Specifically, in the example, Figure 1 , Figure 2 and Figure 3As shown, the buffer assembly 150 includes two first clamping seats 151, two buffer pads 152 and two elastic connectors 153. There are two first clamping seats 151, which are arranged opposite to each other, and clamping grooves are formed on adjacent sides, respectively, so that they can move toward each other or move away from each other. When the two first clamping seats 151 move toward each other, a clamping ring can be formed around the outer periphery of the connection between the drainage hose 140 and the drainage hard tube 130. The two buffer pads 152 are installed in the clamping grooves in a one-to-one correspondence with the two first clamping seats 151, and can move with the corresponding first clamping seats 151. When the two buffer pads 152 move toward each other, a buffer ring can be formed around the outer periphery of the connection between the drainage hose 140 and the drainage hard tube 130. The buffer ring is located in the clamping ring. Two elastic connectors 153 are respectively installed on the tops of the two first clamping seats 151, so that the two first clamping seats 151 can be connected or disconnected. When sampling, the collector drives the two first clamping seats 151 to move toward each other by hand, so that the two buffer pads 152 move toward each other, and then a buffer ring is formed around the outer periphery of the connection between the drainage hose 140 and the drainage hard tube 130, and a clamping ring is formed around the outer periphery of the buffer ring. In this process, the two elastic connectors 153 are connected respectively to connect the two first clamping seats 151. The buffer ring has a buffering and suppressing effect on the vibration of the connection between the drainage hose 140 and the drainage hard tube 130. The two elastic connectors 153 further buffer the vibration of the connection between the drainage hose 140 and the drainage hard tube 130. After the collection is completed, the collector drives the two first clamping seats 151 to move back to back by hand, so that the two buffer pads 152 move back to back, and then the two buffer pads 152 are separated from the connection between the drainage hose 140 and the drainage hard tube 130. In this process, the two elastic connectors 153 are disconnected and connected respectively, so that the two first clamping seats 151 are disconnected.

[0023] Preferably, the two buffer pads 152 are made of sponge rubber or foam plastic, which has better shock-absorbing performance and is more suitable for shock-absorbing occasions with smaller forces than traditional shock-absorbing materials such as rubber and silicone.

[0024] Preferably, a plurality of convex strips are uniformly formed on the inner wall of the buffer ring along the circumferential direction to change the natural frequency of the buffer ring, avoid resonance between the buffer ring and the hose, reduce the transmission of vibration, and avoid vibration amplification.

[0025] Preferably, if Figure 1 , Figure 2 and Figure 3As shown, each elastic connector 153 includes a first connection seat 1531, a second connection seat 1532, a plug connector 1533, two second clamping seats 1534, an upper spring 1535 and a lower spring. The first connection seat 1531 is fixedly mounted on the top of one of the first clamping seats 151. The second connection seat 1532 is fixedly mounted on the top of the other first clamping seat 151. The plug connector 1533 is fixedly mounted on one side of the first connection seat 1531 close to the second connection seat 1532. One of them is mounted on the upper part of the second connection seat 1532 close to the first connection seat 1531 through the upper spring 1535, and the other is mounted on the lower part of the second connection seat 1532 close to the first connection seat 1531 through the lower spring. A plugging slot adapted to the plug connector 1533 is formed between the two second clamping seats 1534. When the two first clamping seats 151 move toward each other, the plug connector 1533 can be inserted into the plug slot to realize elastic connection between the two first clamping seats 151. When the two first clamping seats 151 move away from each other, the plug connector 1533 can be disengaged from the plug slot to disconnect the two first clamping seats 151. This is convenient for connecting and disconnecting the two first clamping seats 151, and can also play a role of buffering and shock absorption during connection.

[0026] Specifically, in the example, Figure 1 , Figure 2 and Figure 4 As shown, the high-temperature flue gas sampling and cooling device of a thermal power plant further includes a stirring mechanism 160 and a braking mechanism 170. The stirring mechanism 160 is rotatably mounted on one end of the drainage hard pipe 130 inserted into the collecting tube 110, and can rotate with the help of the flow of flue gas to stir the high-temperature flue gas in the collecting tube 110, so that the high-temperature flue gas can be quickly and evenly diffused to various areas in the collecting tube 110, which is conducive to improving the heat dissipation efficiency of the high-temperature flue gas flowing into the collecting tube 110. The braking mechanism 170 is mounted on the top cover of the collecting tube 110, and can limit the rotation of the rotating ring 161 or release the restriction on the rotating ring 161. When collecting high-temperature flue gas, the braking mechanism 170 releases the restriction on the rotating ring 161, and with the help of the flow of flue gas, the stirring mechanism 160 can rotate. After the collection is completed, the braking mechanism 170 limits the rotation of the rotating ring 161, so that the flue gas is stationary in the collecting tube 110, so that various components in the flue gas, such as particulate matter and gaseous pollutants, are gradually separated under the action of gravity, which is convenient for subsequent analysis and detection.

[0027] Preferably, the stirring mechanism 160 includes a rotating ring 161, a plurality of blades 162 and a plurality of force-bearing plates 163. The rotating ring 161 is rotatably mounted on one end of the drainage tube 130 inserted into the collecting tube 110 through a bearing. The tops of the plurality of blades 162 are evenly mounted on the bottom of the rotating ring 161 along the circumference of the rotating ring 161. A plurality of force-bearing plates 163 are evenly mounted on the inner side of each blade 162 along the vertical direction. Each force-bearing plate 163 is an arc-shaped structure and is tilted. When the braking mechanism 170 releases the restriction on the rotating ring 161, the flowing high-temperature flue gas impacts each force-bearing plate 163, so that the plurality of blades 162 rotate, so that the high-temperature flue gas can be quickly and evenly diffused to various areas in the collecting tube 110, which is beneficial to improving the heat dissipation efficiency of the high-temperature flue gas flowing into the collecting tube 110.

[0028] Preferably, the brake mechanism 170 includes a guide ring 171, two transmission racks 172, a first transmission rod 173, a second transmission rod, a gear ring 174 and an extrusion ring 175. The guide ring 171 is fixedly installed in the middle of the top cover and cannot rotate. An internal thread is formed on the inner wall of the guide ring 171. The two transmission racks 172 can be installed in the top cover in a linear reciprocating motion, and are both located above the guide ring 171. One of the transmission racks 172 is fixedly connected to one of the first clamping seats 151 through the first transmission rod 173, and the other transmission rack 172 is fixedly connected to the other first clamping seat 151 through the second transmission rod. The two transmission racks 172 can move with the corresponding first clamping seat 151. The gear ring 174 is rotatably installed in the top cover and is located directly above the guide ring 171, and the opposite sides are respectively meshed and connected with the transmission racks 172 on the corresponding sides. The extrusion ring 175 is fixedly mounted on the bottom of the gear ring 174 and is located inside the guide ring 171. It can rotate with the gear ring 174. An external thread matching the internal thread is formed on the outer wall, which can press against the outer wall of the rotating ring 161 or detach from the rotating ring 161. When the two first clamping seats 151 move toward each other, the first transmission rod 173 and the second transmission rod drive the two transmission racks 172 to move, so that the gear ring 174 rotates, and then drives the extrusion ring 175 to rotate. With the help of the external thread on the outer wall of the extrusion ring 175 and the internal thread on the inner wall of the guide ring 171, the extrusion ring 175 moves upward, so that the extrusion ring 175 detaches from the rotating ring 161, and then releases the restriction on the rotating ring 161. The flowing high-temperature flue gas impacts each stress-bearing sheet 163, so that the multiple blades 162 rotate, so that the high-temperature flue gas can quickly and evenly diffuse to various areas in the collection tube 110, which is conducive to improving the heat dissipation efficiency of the high-temperature flue gas flowing into the collection tube 110. When the two first clamping seats 151 move in opposite directions, the first transmission rod 173 and the second transmission rod drive the two transmission racks 172 to move, so that the gear ring 174 rotates, and then drives the extrusion ring 175 to rotate, and the extrusion ring 175 moves downward by means of the external thread on the outer wall of the extrusion ring 175 and the internal thread on the inner wall of the guide ring 171, so that the extrusion ring 175 presses against the outer wall of the rotating ring 161, thereby limiting the rotation of the rotating ring 161. The flue gas is allowed to stand still in the collection tube 110, so that various components in the flue gas, such as particulate matter and gaseous pollutants, are gradually separated under the action of gravity, which is convenient for subsequent analysis and detection.

[0029] Specifically, Figure 2 As shown, the cooling assembly 120 includes a plurality of cooling tubes which are evenly installed inside the side wall of the collecting tube 110 along the circumference of the collecting tube 110 .

[0030] Specifically, in the example, Figure 1As shown, the high-temperature flue gas sampling and cooling device of a thermal power plant further includes a positioning mounting seat 180 and a discharge valve 190. The positioning mounting seat 180 is installed on one side outside the collecting tube 110. The collecting tube 110 can be positioned and installed in the collection area through the positioning mounting seat 180. The discharge valve 190 is installed at the bottom of the collecting tube 110 to control whether the cooled flue gas flows out of the collecting tube 110.

[0031] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0035] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A high-temperature flue gas sampling and cooling device for a thermal power plant, characterized in that: include: A collecting cylinder is used to collect smoke, and a discharge port is formed at the bottom; A cooling assembly, fixedly installed in the collecting tube, for cooling the flue gas; A drainage hard tube, fixedly installed on the top of the collecting tube; A drainage hose, one end of which is connected to the drainage hard tube, and the other end of which is suitable for connecting to the collection port; The buffer component is sleeved on the connection between the drainage hose and the drainage hard tube.

2. The high-temperature flue gas sampling and cooling device for a thermal power plant according to claim 1, characterized in that: The buffer assembly comprises: There are two first clamping seats, which are arranged opposite to each other, and have clamping grooves formed on adjacent sides, respectively, and can move toward each other or move away from each other; when the two first clamping seats move toward each other, they can form a clamping ring around the outer periphery of the connection between the drainage hose and the drainage hard tube; There are two buffer pads, which are installed in the clamping groove in a one-to-one correspondence with the two first clamping seats and can move with the corresponding first clamping seats; when the two buffer pads move toward each other, they can form a buffer ring around the outer periphery of the connection between the drainage hose and the drainage hard pipe; There are two elastic connecting members, which are respectively installed on the top of the two first clamping seats, and can connect or disconnect the two first clamping seats.

3. The high-temperature flue gas sampling and cooling device for a thermal power plant according to claim 2, characterized in that: A plurality of convex strips are evenly formed on the inner wall of the buffer ring along the circumferential direction.

4. The high-temperature flue gas sampling and cooling device for a thermal power plant according to claim 3, characterized in that: Each of the elastic connecting members comprises: A first connecting seat, fixedly mounted on the top of one of the first clamping seats; A second connecting seat, fixedly mounted on the top of another of the first clamping seats; A plug connector, fixedly mounted on a side of the first connection base close to the second connection base; There are two second clamping seats, one of which is installed on the upper part of the second connecting seat close to the first connecting seat through an upper spring, and the other is installed on the lower part of the second connecting seat close to the first connecting seat through a lower spring; a plug-in groove adapted to the plug connector is formed between the two second clamping seats.

5. The high-temperature flue gas sampling and cooling device for a thermal power plant according to claim 2, characterized in that: Also includes: The stirring mechanism is rotatably mounted on one end of the drainage hard pipe inserted into the collecting tube, and can rotate with the help of the flow of the smoke.

6. The high-temperature flue gas sampling and cooling device for a thermal power plant according to claim 5, characterized in that: The stirring mechanism comprises: A rotating ring, rotatably mounted on one end of the drainage tube inserted into the collecting tube; There are multiple blades, which are evenly installed at the bottom of the rotating ring along the circumference of the rotating ring; multiple force-bearing plates are evenly installed on the inner side of each blade along the vertical direction; each force-bearing plate is an arc-shaped structure and is set obliquely.

7. The high-temperature flue gas sampling and cooling device for a thermal power plant according to claim 6, characterized in that: Also includes: The braking mechanism is installed on the top cover of the collecting cylinder and can limit the rotation of the rotating ring or release the restriction on the rotating ring.

8. The high-temperature flue gas sampling and cooling device for a thermal power plant according to claim 7, characterized in that: The braking mechanism comprises: A guide ring, fixedly installed in the middle of the top cover, with an internal thread formed on the inner wall; There are two transmission racks, which are respectively installed in the top cover so as to be reciprocatingly movable along a straight line, and are both located above the guide ring; one of the transmission racks is fixedly connected to one of the first clamping seats through a first transmission rod, and the other transmission rack is fixedly connected to the other first clamping seat through a second transmission rod; the two transmission racks can move with the corresponding first clamping seats; A gear ring is rotatably mounted in the top cover, and two opposite sides are respectively meshed and connected with the transmission racks on the corresponding sides; An extrusion ring is installed at the bottom of the gear ring and is located inside the guide ring. It can rotate with the gear ring, and has an external thread matched with the internal thread formed on its outer wall. It can press against or detach from the rotating ring. When the two first clamping seats move toward each other, the two transmission racks are driven to move by the first transmission rod and the second transmission rod, so that the gear ring rotates, and then the extrusion ring is driven to rotate, so that the extrusion ring is separated from the rotating ring, and the restriction on the rotating ring is released; when the two first clamping seats move away from each other, the two transmission racks are driven to move by the first transmission rod and the second transmission rod, so that the gear ring rotates, and then the extrusion ring is driven to rotate, so that the extrusion ring is pressed against the outer wall of the rotating ring, and the rotation of the rotating ring is restricted.

9. The high-temperature flue gas sampling and cooling device for a thermal power plant according to claim 1, characterized in that: The cooling assembly comprises: There are multiple cooling pipes, which are evenly installed inside the side wall of the collecting tube along the circumference of the collecting tube.

10. The high-temperature flue gas sampling and cooling device for a thermal power plant according to claim 1, characterized in that: Also includes: A positioning mounting seat, mounted on one side outside the collecting tube; A discharge valve is installed at the bottom of the collecting cylinder.

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