Wall temperature monitoring device for high-temperature superheater of boiler

Abstract

The utility model discloses a wall temperature monitoring device for a high-temperature superheater of a boiler. The wall temperature monitoring device comprises a wall temperature anti-oxidation thermocouple, a self-radiating wiring terminal box and a temperature acquisition PLC (Programmable Logic Controller) control cabinet, the system is mainly composed of three parts, the front end is composed of a 20-point centralized high-temperature anti-oxidation thermocouple, and the 20-point centralized thermocouple is formed by drawing anti-oxidation composite steel and has a good resisting effect on high-temperature steam oxidation. According to the centralized total temperature thermocouple integration box convenient to dissipate heat, heat generated in the box body can be discharged through the heat dissipation fan set, and the heat dissipation fan set is fixed to the top end of the box body through bolts. The tail end forms a PLC control cabinet through a temperature acquisition module, and the temperature actually measured at the front end is acquired and then transmitted to a client DCS system through a cabinet body communication module, so that remote monitoring and control are realized. The problem that the wall temperature of the high-temperature superheater pipeline cannot be monitored is solved, and the situation of local high-temperature bursting caused by pipeline blockage or other conditions is effectively prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of thermocouple temperature remote control, in particular to a boiler high-temperature superheater wall temperature monitoring device. Background Art

[0002] Energy conservation is an urgent task for my country's economic and social development. We should take resource conservation as a basic national policy and accelerate the construction of a resource-saving and environmentally friendly society. For power supply enterprises, it is mainly reflected in energy conservation and loss reduction. With the sustained and healthy development of the national economy and the continuous improvement of people's material and cultural living standards, the demand for electric energy has been rising. However, in recent years, the power generation of various energy sources in the country is far from meeting people's needs. Power outages and power restrictions have appeared in various parts of the country. According to statistics, this year's power shortage will be more serious. The contradiction between supply and demand has become increasingly serious, which has seriously affected economic development and people's lives. As for the current situation, whether it is power production and supply units or power users, there is great potential for energy conservation. This is a way to relieve pressure. The reform of the power system will push the power industry to the market. As a commodity, electricity will also change from a seller's market to a buyer's market. The benefits of enterprises will prompt enterprises to reduce costs in all aspects, collect the highest profits, and reduce losses. This will be one of the important means to increase profits and reduce costs. Under the condition of certain power generation efficiency, energy conservation and consumption reduction are also another important indicator reflecting the economic level and economic benefits of enterprises.

[0003] During the power generation process, the high-temperature superheater of the power plant may cause the steam pipe to be blocked and the temperature to expand rapidly. Once the temperature expands rapidly, it is very easy to cause the pipe to burst, causing economic losses and casualties. Therefore, a boiler high-temperature superheater wall temperature monitoring device is now used. In order to centrally monitor the dynamic data of the high-temperature superheater pipe wall temperature and monitor whether the pipe is blocked in real time, we have developed a boiler high-temperature superheater wall temperature monitoring device to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a boiler high-temperature superheater wall temperature monitoring device to solve the problem that the temperature cannot be monitored in real time in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a boiler high-temperature superheater wall temperature monitoring device, including a wall temperature anti-oxidation thermocouple, a self-heating terminal box, and a temperature acquisition PLC control cabinet. The wall temperature anti-oxidation thermocouple is fixed to the back panel mounting hole of the self-heating terminal box by a sleeve thread, and the wall temperature anti-oxidation thermocouple temperature measuring end is connected to the high-temperature superheater wall temperature pipe. The self-heating terminal box has a built-in terminal block, which is led out from the electrical outlet of the self-heating terminal box after wiring. The communication signal cable enters the temperature acquisition PLC control cabinet and enters the cabinet through the electrical interface of the temperature acquisition PLC control cabinet. The temperature signal is collected by the temperature collector at the front end temperature, transmitted to the temperature acquisition PLC control cabinet 485 communication module, and output to the DCS control system. The normal temperature of the high-temperature superheater tube wall is 535℃. The technicians set the collector alarm temperature upper and lower limits to ±5℃. The high-temperature superheater tube diameter is DN58, the wall thickness is 6mm, and the pipe material is carbon steel. Under long-term high-temperature steam conditions, the inner wall of the pipe will corrode and iron filings will peel off, causing the pipe to be blocked. Once the pipe is blocked, the steam water will not flow smoothly, causing the temperature to rise sharply. Once it reaches the critical point that the pipe can withstand, it will cause the pipe to burst, causing a production safety accident. The wall temperature anti-oxidation thermocouple measuring end is connected to the high-temperature superheater tube wall to measure the temperature. The thermocouple signal is connected to the temperature collection cabinet from the heat dissipation terminal box. The temperature collection PLC control cabinet 485 communication module outputs it to the DCS control system. In the central control room, there are staff to view the data screen and alarm information of the control computer to detect the entire process.

[0006] Preferably, the high-temperature anti-oxidation thermocouple is integrally drawn from an oxidation-resistant metal material.

[0007] Preferably, the self-heating terminal box is provided with a self-heating fan group for self-heating and cooling.

[0008] Preferably, the temperature acquisition PLC control cabinet is internally composed of an environmentally resistant high temperature signal acquisition module and a high temperature resistant 485 data communication module.

[0009] Preferably, a ferrule thread is disposed on the outside of the thermocouple body, and a thread connected to the ferrule thread is disposed on the outside of the thermocouple body.

[0010] Preferably, a cooling fan group is installed on the top of the box, and two cooling fan groups are provided.

[0011] Preferably, the heat dissipation fan assembly comprises a mounting sleeve, a lower end cover, an upper end cover, an arc-shaped limit frame, a sliding mounting sleeve, a driving gear ring, a positioning card slot, a mounting connecting plate, a first through hole, a ventilation and heat dissipation plate, a driving gear, a positioning card rod, a positioning card rod push spring, a second through hole, a motor mounting slot, an execution motor, a blade mounting sleeve, and blades. One end of the mounting sleeve is fixedly mounted with the lower end cover, and the other end of the mounting sleeve is fixedly mounted with the upper end cover, the upper end cover is fixedly mounted with the arc-shaped limit frame, the driving gear ring is rotationally limitedly mounted in the arc-shaped limit frame, the sliding mounting sleeve is fixedly mounted on the arc-shaped limit frame, the sliding mounting sleeve is slidably mounted with a positioning card rod, and the positioning card rod and the sliding A positioning card rod push spring is arranged between the movable mounting sleeve, and a positioning card slot is arranged on the driving gear ring. The positioning card rod is connected with the positioning card slot under the action of the positioning card rod push spring. A ventilation heat dissipation plate is rotatably installed on the upper end cover, and a driving gear is fixedly installed on the ventilation heat dissipation plate. The driving gear is meshed with the driving gear ring for transmission. A mounting connecting plate is fixedly installed on the upper end cover, and a through hole 1 is opened on the mounting connecting plate. The ventilation heat dissipation plate is placed in the through hole 1 to open or close. A motor mounting slot is arranged on the lower end cover, and an executive motor is installed in the motor mounting slot. A blade mounting sleeve is installed on the output shaft of the executive motor, and a plurality of blades are evenly distributed on the blade mounting sleeve. A plurality of through holes 2 are opened on the lower end cover.

[0012] Preferably, the positioning slots are provided in plurality, and the plurality of positioning slots are evenly distributed on the upper end surface of the driving gear ring along the circumferential direction of the central axis of the driving gear ring.

[0013] Compared with the prior art, the utility model has the following beneficial effects: real-time monitoring of high-temperature superheater pipe wall temperature data, monitoring of pipe steam flow conditions, real-time adjustment of boiler temperature, and saving of boiler coal utilization efficiency.

[0014] (1) One end of the wall temperature anti-oxidation thermocouple is connected to the high-temperature superheater pipe wall, and the other end is connected to the self-heating terminal box. The connection process is a ferrule thread and a high-temperature wall temperature block thread connection, which is convenient for later maintenance and free disassembly. The separate installation of the thermocouple bodies can realize single-point temperature replacement, which can avoid the problem of large-scale replacement of temperature measurement points due to single-point temperature damage. The temperature measurement points meet the single-point replacement requirements;

[0015] (2) The two self-cooling fans in the self-cooling terminal box can smoothly reduce the internal temperature of the terminal box from 50 degrees to the normal working level of about 35 degrees, and can ensure the long-term safe and stable operation of the internal terminals of the terminal box;

[0016] (3) Through the temperature acquisition PLC control cabinet 485 communication module, three outputs are realized. The first output is for on-site cabinet temperature display, the second output is for communication to the DCS system to realize real-time temperature monitoring, and the third output is for redundant standby processing;

[0017] (4) When the box needs to be cooled, the execution motor is started, and the blade mounting sleeve and the blade are driven to rotate simultaneously by the execution motor, thereby generating negative pressure, so that the air in the box passes through the second through hole, the mounting sleeve and the first through hole, thereby realizing the heat dissipation of the box; at the same time, the driving ring gear is manually rotated, and the meshing transmission between the driving ring gear and the driving gear drives the ventilation heat dissipation plate to rotate, thereby changing the opening between the ventilation heat dissipation plate and the first through hole, thereby realizing the adjustment of the heat dissipation effect of the box. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the wall temperature anti-oxidation thermocouple structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the self-heating terminal box of the utility model;

[0020] Figure 3 This is a schematic diagram of the cross-sectional structure of the temperature collection PLC control cabinet of the utility model;

[0021] Figure 4 This is a schematic diagram of the front cross-sectional structure of a high-temperature superheater tube of the utility model;

[0022] Figure 5 It is a structural schematic diagram of the heat dissipation fan assembly of the utility model;

[0023] Figure 6 for Figure 5 Schematic diagram of the cutting line position;

[0024] Figure 7 for Figure 6 Cross-sectional view along section AA;

[0025] Figure 8 It is a structural schematic diagram of the ventilation and heat dissipation plate of the utility model.

[0026] In the figure: 1. Self-heating terminal box; 2. Terminal box mounting hole;

[0027] 3. Cooling fan assembly: installation sleeve 3-1; lower end cover 3-2; upper end cover 3-3; arc limit frame 3-4; sliding installation sleeve 3-5; driving gear ring 3-6; positioning card slot 3-7; installation connecting plate 3-8; through hole one 3-9; ventilation heat dissipation plate 3-10; driving gear 3-11; positioning card rod 3-12; positioning card rod push spring 3-13; through hole two 3-14; motor installation slot 3-15; execution motor 3-16; blade installation sleeve 3-17; blade 3-18; 4. Electrical interface; 5. High-temperature superheater pipeline; 6. Temperature acquisition PLC control cabinet; 7. Control cabinet 485 communication module; 8. PLC control cabinet temperature acquisition module; 9. Wall temperature anti-oxidation thermocouple; 10. Removable fixed sleeve thread; 11. PLC control cabinet electrical interface. DETAILED DESCRIPTION

[0028] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] Example 1: Please refer to Figure 1-4A boiler high-temperature superheater wall temperature monitoring device includes a wall temperature anti-oxidation thermocouple, a self-heating terminal box, and a temperature acquisition PLC control cabinet. The wall temperature anti-oxidation thermocouple 9 is fixed to the back panel mounting hole of the self-heating terminal box 1 by a sleeve thread 10, and the wall temperature anti-oxidation thermocouple temperature measuring end is connected to the high-temperature superheater wall temperature pipe 11. The self-heating terminal box has a built-in terminal block, which is connected to the electrical outlet of the self-heating terminal box 4 after wiring. The communication signal cable enters the temperature acquisition PLC control cabinet 6 and enters the cabinet through the electrical interface 11 of the temperature acquisition PLC control cabinet. The temperature signal is collected by the temperature collector 8 at the front end temperature, transmitted to the temperature acquisition PLC control cabinet 485 communication module 7, and output to the DCS control system.

[0032] Specifically, Figure 1 , Figure 2 , Figure 3 As shown in the figure, the wall temperature anti-oxidation thermocouple is fixed at the installation hole of the self-heating terminal box, the temperature measuring end of the wall temperature anti-oxidation thermocouple is connected to the high-temperature superheater wall temperature pipe, the built-in terminal block of the self-heating terminal box is wired out, the communication signal cable enters the electrical interface of the temperature acquisition PLC control cabinet and enters the cabinet body, the temperature signal is collected by the temperature collector at the front end temperature, transmitted to the temperature acquisition PLC control cabinet 485 communication module and output to the DCS control system. The wall temperature and humidity of each high-temperature superheater pipe can be monitored in real time.

[0033] Embodiment 2: A plurality of mounting holes 2 are formed inside the back plate of the self-heat dissipation terminal box. The mounting holes 2 are evenly spaced on the plane of the back plate. The back plate is made of galvanized sheet.

[0034] Specifically, Figure 1 and Figure 3 As shown, the thermocouple bodies 9 inside the integrated box have strong strength, are durable and have good thermal conductivity. The insulation resistance of the thermocouple bodies 9 between each point of the thermocouple body 9 and the support rod and between points inside the self-heating terminal box should be no less than 500MΩ. The leads of the thermocouple body 9 can withstand high temperatures above 600°C and can ensure long-term safe and stable operation.

[0035] Example 4: Please refer to Figure 5-8 A cooling fan group 3 is installed on the top of the box body 2, and two cooling fan groups 3 are provided.

[0036] Specifically, Figure 5 and Figure 7As shown, the cooling fan group 3 includes a mounting sleeve 3-1, a lower end cover 3-2, an upper end cover 3-3, an arc-shaped limit frame 3-4, a sliding mounting sleeve 3-5, a driving gear ring 3-6, a positioning card slot 3-7, a mounting connecting plate 3-8, a through hole 1 3-9, a ventilation heat dissipation plate 3-10, a driving gear 3-11, a positioning card rod 3-12, a positioning card rod push spring 3-13, a through hole 2 3-14, a motor mounting slot 3-15, an execution motor 3-16, a blade mounting sleeve 3-17, and a blade 3-18. One end of the mounting sleeve 3-1 is fixedly mounted with the lower end cover 3-2, and the other end of the mounting sleeve 3-1 is fixedly mounted with the upper end cover. 3-3, an arc-shaped limit frame 3-4 is fixedly installed on the upper end cover 3-3, and a driving gear ring 3-6 is rotatably installed in the arc-shaped limit frame 3-4, a sliding installation sleeve 3-5 is fixedly installed on the arc-shaped limit frame 3-4, and a positioning card rod 3-12 is slidably installed in the sliding installation sleeve 3-5, and a positioning card rod push spring 3-13 is arranged between the positioning card rod 3-12 and the sliding installation sleeve 3-5, and a positioning card groove 3-7 is arranged on the driving gear ring 3-6, and the positioning card rod 3-12 is connected with the positioning card groove 3-7 under the action of the positioning card rod push spring 3-13, and a ventilation heat dissipation plate 3-10 is rotatably installed on the upper end cover 3-3, and the ventilation heat dissipation plate A driving gear 3-11 is fixedly mounted on 3-10, and the driving gear 3-11 is meshed with the driving gear ring 3-6 for transmission. A mounting connecting plate 3-8 is fixedly mounted on the upper end cover 3-3, and a through hole 1 3-9 is opened on the mounting connecting plate 3-8. The ventilation and heat dissipation plate 3-10 is placed in the through hole 1 3-9 to be opened or closed. A motor mounting groove 3-15 is provided on the lower end cover 3-2, and an execution motor 3-16 is installed in the motor mounting groove 3-15. A blade mounting sleeve 3-17 is installed on the output shaft of the execution motor 3-16, and a plurality of blades 3-18 are evenly distributed on the blade mounting sleeve 3-17. A plurality of through holes 2 3-14 are opened on the lower end cover 3-2. In this arrangement, when the box body 2 needs to be cooled, the execution motor 3-16 is started, and the execution motor 3-16 drives the blade mounting sleeve 3-17 and the blade 3-18 to rotate simultaneously, thereby generating negative pressure, so that the air in the box body 2 passes through the through hole 2 3-14, the mounting sleeve 3-1 and the through hole 1 3-9, thereby realizing the heat dissipation of the box body 2; at the same time, the driving ring gear 3-6 is manually rotated, and the meshing transmission of the driving ring gear 3-6 and the driving gear 3-11 drives the ventilation heat sink 3-10 to rotate, thereby changing the opening between the ventilation heat sink 3-10 and the through hole 1 3-9, thereby realizing the adjustment of the heat dissipation effect of the box body 2.

[0037] There are multiple positioning slots 3-7, and the multiple positioning slots 3-7 are evenly distributed on the upper end surface of the driving gear ring 3-6 along the circumferential direction of the center axis of the driving gear ring 3-6.

[0038] Working principle: When the utility model is in use, first install and fix the thermocouple body 9 on the back plate of the self-heating terminal box, then connect the thermocouple connecting wire to the terminal block inside the self-heating terminal box, and the signal cable is led out from the electrical interface 4 of the self-heating terminal box to the temperature acquisition PLC control cabinet. The high-temperature anti-oxidation thermocouple has strong strength, durability and good thermal conductivity. The insulation resistance of the thermocouple between each point and the support rod inside the self-heating terminal box and between points should be no less than 500MΩ. The thermocouple lead wire can withstand high temperatures of more than 600°C and can ensure long-term safe and stable operation. The thermocouple bodies 9 are installed separately to achieve single-point temperature replacement, which can avoid the problem of large-scale replacement of temperature measurement points due to single-point temperature damage. The temperature measurement point meets the requirements of single-point replacement. This device is used for centralized collection of the total temperature of the high-temperature superheater wall temperature of the boiler in a thermal power plant. The integrated thermocouple cabinet system can well replace the imported boiler wall temperature control system. This system can well increase or decrease the temperature measurement points individually, and can independently By replacing the temperature sensor, you can customize up to 3 4865 communication lines, one on-site LCD screen, two Category 5e network cables leading to the computer room, and three redundant backups. The cabinets in this system adopt a decentralized and freely assembled modular design. The temperature measurement points can be freely increased or decreased, and the measured data can be freely connected in series. The 485 data acquisition and summary module on the upper part of the cabinet can collect the temperature values ​​measured by this cabinet and then use the 485 signal to pass through the Category 5e network cable to the existing computer room backup 485 data interface. The staff can monitor the temperature of each pipe of the high-temperature superheater in real time on the display screen in the computer room to prevent the vicious production accidents such as local rapid temperature rise caused by foreign matter blocking the pipeline, thereby effectively preventing the occurrence of such accidents.

[0039] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0040] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A boiler high-temperature superheater wall temperature monitoring device, comprising a wall temperature anti-oxidation thermocouple, a self-heating terminal box, and a temperature acquisition PLC control cabinet, characterized in that: The wall temperature anti-oxidation thermocouple (9) is fixed to the back plate mounting hole of the self-heating terminal box (1) by a ferrule thread (10); the temperature measuring end of the wall temperature anti-oxidation thermocouple is connected to the wall temperature pipe of the high-temperature superheater; the self-heating terminal box has a built-in terminal block, which is led out from the electrical outlet of the self-heating terminal box after wiring; the communication signal cable enters the temperature acquisition PLC control cabinet (6) and enters the cabinet body through the electrical interface (11) of the temperature acquisition PLC control cabinet; the temperature signal is collected by the temperature collector (8) to collect the front end temperature, and is transmitted to the temperature acquisition PLC control cabinet 485 communication module (7) and output to the DCS control system.

2. A boiler high temperature superheater wall temperature monitoring device according to claim 1, characterized in that: The wall temperature anti-oxidation thermocouple (9) collects temperature, connects the signal line through the self-heating terminal box (1), and transmits the temperature signal to the temperature collection PLC control cabinet (6). The temperature signal is collected by the temperature collector (8) at the front end temperature, transmitted to the temperature collection PLC control cabinet 485 communication module (7), and output to the DCS control system.

3. A boiler high temperature superheater wall temperature monitoring device according to claim 1, characterized in that: The wall temperature anti-oxidation thermocouple (9) collects temperature, the self-heat dissipation terminal box (1) is connected to the signal line, the temperature collection PLC control cabinet (6) collects the front-end temperature, and the control cabinet 485 communication module (7) outputs the signal.

4. A boiler high temperature superheater wall temperature monitoring device according to claim 1, characterized in that: A cooling fan group (3) is installed on the top of the self-heating terminal box (1), and two groups of cooling fan groups (3) are provided.

5. A boiler high temperature superheater wall temperature monitoring device according to claim 4, characterized in that: The heat dissipation fan assembly (3) comprises a mounting sleeve (3-1), a lower end cover (3-2), an upper end cover (3-3), an arc-shaped limiting frame (3-4), a sliding mounting sleeve (3-5), a driving gear ring (3-6), a positioning slot (3-7), a mounting connecting plate (3-8), a first through hole (3-9), a ventilation heat dissipation plate (3-10), a driving gear (3-11), a positioning lever (3-12), a positioning lever push spring (3-13), a second through hole (3-14), a motor mounting slot (3-15), an actuator motor (3-16), a blade mounting sleeve (3-17), a second through hole (3-18), a second through hole (3-19), a second through hole (3-20), a second through hole (3-21), a second through hole (3-22), a second through hole (3-23), a second through hole (3-24), a second through hole (3-25), a second through hole (3-26), a second through hole (3-27), a second through hole (3-28), a second through hole (3-29), a second through hole (3-30), a second through hole (3-31), a second through hole (3-32), a second through hole (3-33), a second through hole (3-34), a second through hole (3-35), a second through hole (3-36), a second through hole (3-37), a second through hole (3-38), a second through hole (3-39), a second through hole (3-40), a second through hole (3-41), a second through hole (3-42), a second through hole (3-43), a second through hole (3-44), a second through hole (3-45), a second through hole (3-46), a second through hole (3-47), a second through hole (3-48), a second through hole (3-49), a second through hole (3-50), a second through hole (3 3-17), blades (3-18), a lower end cover (3-2) is fixedly mounted on one end of the mounting sleeve (3-1), an upper end cover (3-3) is fixedly mounted on the other end of the mounting sleeve (3-1), an arc-shaped limit frame (3-4) is fixedly mounted on the upper end cover (3-3), a driving gear ring (3-6) is rotationally limitedly mounted in the arc-shaped limit frame (3-4), a sliding mounting sleeve (3-5) is fixedly mounted on the arc-shaped limit frame (3-4), a positioning clamping rod (3-12) is slidably mounted in the sliding mounting sleeve (3-5), and the positioning clamping rod (3-12) A positioning card rod push spring (3-13) is arranged between the upper cover (3-3) and the sliding installation sleeve (3-5); a positioning card slot (3-7) is arranged on the driving gear ring (3-6); the positioning card rod (3-12) is connected with the positioning card slot (3-7) under the action of the positioning card rod push spring (3-13); a ventilation heat dissipation plate (3-10) is rotatably installed on the upper end cover (3-3); a driving gear (3-11) is fixedly installed on the ventilation heat dissipation plate (3-10); the driving gear (3-11) is meshed with the driving gear ring (3-6) for transmission; and a mounting plate (3-3) is fixedly installed on the upper end cover (3-3). A connecting plate (3-8) is installed, a through hole one (3-9) is opened on the connecting plate (3-8), a ventilation heat dissipation plate (3-10) is placed in the through hole one (3-9) to be opened or closed, a motor installation groove (3-15) is provided on the lower end cover (3-2), an actuator motor (3-16) is installed in the motor installation groove (3-15), a blade installation sleeve (3-17) is installed on the output shaft of the actuator motor (3-16), a plurality of blades (3-18) are evenly distributed on the blade installation sleeve (3-17), and a plurality of through holes two (3-14) are opened on the lower end cover (3-2).

6. A boiler high temperature superheater wall temperature monitoring device according to claim 5, characterized in that: A plurality of positioning slots (3-7) are provided, and the plurality of positioning slots (3-7) are evenly distributed on the upper end surface of the driving gear ring (3-6) along the circumferential direction of the central axis of the driving gear ring (3-6).

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