Intelligent and timely U-shaped pipe monitoring equipment and method for power station boiler superheater
By designing an intelligent and timely U-tube monitoring device for power station boiler superheater including U-type monitoring pipe, robotic arms, cooling protective cover and air-conditioning control system, the operation conditions of 5U-type tubes in the prior art are solved. The problem is that real-time monitoring of boiler 5 and timely adjustment of water vapor quality is achieved, avoiding the problem of boiler 5 bursting pipes and rapid salt accumulation in the steam turbine.
Patent Information
- Application Number
- CN202411605088.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-12
- Publication Date
- 2025-02-14
AI Technical Summary
The existing boiler 5 "four pipes" monitoring equipment cannot monitor the timely operating conditions of the U-shaped pipes in real time during the operation of boiler 5, resulting in the inability to prevent and promptly correct corrosion, scale formation, scale growth and fall-off problems, which increases safety hazards and economic losses.
Design an intelligent and timely U-tube monitoring equipment for superheaters of power stations, including U-tube monitoring pipes, robotic arms, cooling protective covers and air-conditioning control systems. Through the robotic arms, the U-tube monitoring pipes and the sampling ports in the boiler can be realized. Real-time monitoring and detection of superheated steam.
Real-time monitoring of boiler 5U-shaped pipes is realized, and the real operation of boiler 5 can be controlled during operation, which is convenient to adjust the quality of water vapor in a timely manner, avoid the problem of rapid salt accumulation of boiler 5 pipe bursting and steam turbines, and improve safety and economic benefits.
Smart Images
Figure CN119436115A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of "four-tube" anti-corrosion and anti-scaling, anti-oxidation scale proliferation and shedding of industrial steam boilers, and specifically belongs to an intelligent timely U-tube monitoring device and method for a power station boiler superheater. Background Art
[0002] Since the water vapor system of industrial boiler 5 is a huge and interconnected high-temperature and high-pressure component, the purpose of setting up monitoring tubes is to monitor the quality of water vapor and the damage to the inner wall of the relevant furnace tubes, such as corrosion, scaling, oxide scale proliferation and shedding. At present, the "four-tube" monitoring tube of boiler 5 is welded to the relevant part of "four-tube of boiler 5" during the maintenance of boiler 5, and the tube cutting inspection can only be carried out in the next maintenance cycle or when boiler 5 is shut down. It is impossible to monitor the timely operating conditions of the "four-tube" of boiler 5 during the operation of boiler 5, which cannot achieve the purpose of prevention and timely correction, and the expected effect of monitoring cannot be achieved. In the practical generation process of supercritical or ultra-supercritical units, if the water quality of boiler 5 feed water is improperly treated, the superheater will quickly generate a large amount of oxide scale, resulting in large-scale tube burst accidents, which will bring huge safety hazards and economic losses to the enterprise.
[0003] In addition, the steam quality of superheated steam will directly affect whether the turbine will have a tendency to accumulate salt. Once a serious salt accumulation accident occurs in the turbine, it will also bring huge safety hazards and economic losses to the enterprise. Summary of the invention
[0004] In order to overcome the problems existing in the background technology, the present invention provides an intelligent timely U-tube monitoring device and method for the superheater of a power station boiler 5, so as to solve the technical problems of corrosion and scaling prevention, and prevention of oxide scale proliferation and shedding of the "four tubes" of the industrial steam boiler 5; the operation of the superheated steam pipe can be supervised in a timely manner, and the actual operation status of the boiler 5 can be controlled during operation, which is convenient for timely adjustment and control of the water vapor quality, and effectively avoids the problems of tube burst of the boiler 5 and rapid salt accumulation of the turbine.
[0005] To achieve the above purpose, the invention is implemented through the following technical solutions: An intelligent timely U-shaped tube monitoring device for a power station boiler superheater, comprising a U-shaped monitoring tube 1, a mechanical arm 2, a cooling protection cover 3, and a cold air control system 4; the mechanical arm 2 is installed on the furnace wall of a boiler 5, the U-shaped monitoring tube 1 is clamped and fixed at the end of the mechanical arm 2, and the two ends of the U-shaped monitoring tube 1 are butt-jointed to a sampling port A 51 and a sampling port B 52 provided on the outer wall of the boiler 5, the sampling port A 51 and the sampling port B 52 are respectively connected to a low-temperature superheated steam header and a high-temperature superheated steam header in the boiler through pipelines; the sampling port A A connecting hose 6 that is butt-jointed with both ends of the U-shaped monitoring tube 1 is fixedly connected to the sampling A port 51 and the sampling B port 52, and the connecting hose 6 is made of high-temperature silicone material that is resistant to high temperature and high pressure; the robotic arm 2 moves the U-shaped monitoring tube 1 and butts both ends to the connecting hose 6 on the sampling A port 51 and the sampling B port 52; the sampling A port 51 and the sampling B port 52 are provided with an electrically controlled valve 53 for controlling the on and off; the cooling protective cover 3 is installed on the robotic arm 2, and the cold air control system 4 is connected to the cooling protective cover 3 to cool the U-shaped monitoring tube 1.
[0006] Preferably, the robotic arm 2 includes an L-shaped fixed arm 21 and a movable arm 22; one end of the fixed arm 21 is fixedly connected to the furnace wall of the boiler 5, and the movable arm 22 is vertically connected to the end of the fixed arm 21, and the U-shaped monitoring tube 1 is installed on a clamping mechanism 23 set at the movable end of the movable arm 22.
[0007] Preferably, the clamping mechanism 23 includes a U-shaped fixing groove 231, a fixing plate 232, and a fixing bolt 233; the fixing groove 231 is installed at the moving end of the moving arm 22, and the fixing bolt 233 is threadedly installed on a side plate of the fixing groove 231. The fixing plate 232 is located in the fixing groove 231 and is rotatably connected to the end of the fixing bolt 233. The U-shaped monitoring tube 1 is clamped and fixed between the side plate and the fixing plate 232 in the fixing groove 231.
[0008] Preferably, the side plates of the fixing groove 231 and the fixing plate 232 are provided with arc-shaped grooves 234 for clamping and fixing the U-shaped monitoring tube 1 .
[0009] Preferably, the end of the connecting hose 6 is configured as a trumpet-shaped structure for easy docking with the U-shaped monitoring tube 1 .
[0010] Preferably, the cooling protective cover 3 includes an upper cover body 31 and a lower cover body 32 which are covered together to cover the U-shaped monitoring tube 1 inside; the upper cover body 31 and the lower cover body 32 are respectively connected to an opening and closing mechanism 34 installed on the fixed arm 21 through a connecting rod 33.
[0011] Preferably, the cold air control system 4 includes a temperature sensor 41, an air cooler 42, and a control chip 43. The air cooler 42 is connected to the upper cover body 31 through a cold air inlet pipe 44, and the lower cover body 32 is connected to an air outlet pipe 45; the temperature sensor 41 is installed at the end of a spring telescopic rod 321 provided in the lower cover body 32, the temperature sensor 41 contacts the side wall of the U-shaped monitoring tube 1, and the temperature sensor 41 is electrically connected to the control chip 43; the control chip 43 is also electrically connected to the control switch of the air cooler 42, and the control chip 43 is also electrically connected to a display screen 46 for displaying the temperature value of the temperature sensor 41.
[0012] Preferably, the opening and closing mechanism 34 includes two slide grooves 341, two sliders 342, a screw rod I 343, and a motor I 344; the two slide grooves 341 are respectively installed on the upper and lower sides of the fixed arm 21, and overlap in the vertical direction; the two sliders 342 are respectively slidably installed in the two slide grooves 341; the screw rod I 343 is installed in the two slide grooves 341, and the two ends are respectively rotatably connected to the ends of the two slide grooves 341, and the middle part is rotatably installed on the fixed arm 21 and threadedly connected with the two sliders 342; the motor I 344 is installed at the upper end of the slide groove 341 and is transmission connected to the screw rod I 343, and the screw threads of the screw rod I 343 located in the two slide grooves 341 have opposite spiral directions.
[0013] Preferably, the movable arm 22 includes a fixed sleeve 221, a square telescopic rod 222, a screw rod II 223, and a motor II 224; the side wall of the fixed sleeve 221 of the movable arm 22 is connected to the end of the fixed arm 21, the square telescopic rod 222 is slidably sleeved in the fixed sleeve 221, the screw rod II 223 is rotatably installed in the fixed sleeve 221 through a bearing, and is threadedly connected to the square telescopic rod 222, the motor II 224 is installed at the end of the fixed sleeve 221 and is transmission-connected to the screw rod II 223; the clamping mechanism 24 is connected to the end of the square telescopic rod 222 of the movable arm 22.
[0014] The monitoring method based on the above-mentioned intelligent timely U-tube monitoring device for a power station boiler superheater comprises the following steps; S1, install the U-shaped monitoring tube 1 on the end of the mechanical arm 2 through the clamping mechanism 24; S2, the U-shaped monitoring tube 1 is moved by the mobile mechanical arm 2 and the two ends are docked on the connecting hose 6 provided on the sampling port A 51 and the sampling port B 52, and the sampling port A 51 and the sampling port B 52 are opened by the electric control valve 53 to allow the superheated steam to pass through the U-shaped monitoring tube 1; S3, after the U-shaped monitoring tube 1 has been working for a period of time, the U-shaped monitoring tube 1 is removed from the connecting hose 6 by the mechanical arm 2; S4, then use the cooling protection cover 3 on the robot arm 2 to cover the U-shaped monitoring tube 1, and fill the cooling protection cover 3 with cold air through the cold air control system 4 to cool the U-shaped monitoring tube 1 to the temperature when the boiler 5 is shut down; S5, open the cooling protective cover 3, take out the U-shaped monitoring tube 1 from the mechanical arm 2, and then cut, inspect and analyze the U-shaped monitoring tube 1 to determine the steam quality.
[0015] The beneficial effects of the present invention are as follows: the present invention can automatically connect the U-shaped monitoring tube to the sampling port A and the sampling port B on the boiler arm connected to the boiler by setting a mechanical arm, so that superheated steam passes through the U-shaped monitoring tube and keeps the working state of the U-shaped monitoring tube. When it is necessary to detect and analyze the steam quality, the U-shaped monitoring tube can be automatically taken out and detected and analyzed by the mechanical arm. The U-shaped monitoring tube can be taken out at any time for detection and analysis according to the actual working condition of the boiler, so as to check the working state of the boiler and the quality of the steam in real time, so as to timely inspect and adjust the boiler and prevent possible hazards to the boiler without waiting for the boiler to be shut down for inspection, which is convenient for timely adjustment and control of the water vapor quality and effectively avoids the problems of boiler tube burst and rapid salt accumulation in the turbine. The mechanical arm can intelligently control the connection and removal of the U-shaped monitoring tube and the superheated steam in the boiler, thereby improving the convenience of the detection and analysis of the U-shaped monitoring tube. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.
[0017] Figure 2 It is a partial enlarged view of the present invention.
[0018] Figure 3 It is a schematic diagram of the connection between the U-shaped monitoring tube and the connecting hose 6.
[0019] Figure 4 It is a schematic diagram of the top plan structure of the robotic arm.
[0020] Figure 5 It is a structural schematic diagram of the cooling protective cover.
[0021] Figure 6 It is a structural schematic diagram of the clamping mechanism.
[0022] Figure 7 It is a structural schematic diagram of the opening and closing mechanism.
[0023] Figure 8 A three-dimensional schematic diagram of the cross-sectional structure of the movable arm.
[0024] Fig. 9 Schematic diagram of the working principle of the air conditioning control system. DETAILED DESCRIPTION
[0025] In order to make the objectives, technical solutions and beneficial effects of the present invention more clear, preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings to facilitate understanding by technicians.
[0026] Embodiment 1, as Figure 1-9As shown, the present invention provides an intelligent timely U-shaped tube monitoring device for a power station boiler superheater, comprising a U-shaped monitoring tube 1, a mechanical arm 2, a cooling protection cover 3, and a cold air control system 4; the mechanical arm 2 is installed on the furnace wall of a boiler 5, the U-shaped monitoring tube 1 is clamped and fixed at the end of the mechanical arm 2, and the two ends of the U-shaped monitoring tube 1 are butt-jointed to a sampling port A 51 and a sampling port B 52 provided on the outer wall of the boiler 5, the sampling port A 51 and the sampling port B 52 are respectively connected to a low-temperature superheated steam header and a high-temperature superheated steam header in the boiler through pipelines; the sampling port A 51 and the sampling port B 52 are fixed on A connecting hose 6 is connected to the two ends of the U-shaped monitoring tube 1, and the connecting hose 6 is made of high-temperature silicone material that is resistant to high temperature and pressure; the connecting hose 101 is made of high-temperature and high-pressure silicone material that can withstand 1500°C and above 30MPa. The robotic arm 2 moves the U-shaped monitoring tube 1 and docks its two ends on the connecting hose 6 on the sampling port A 51 and the sampling port B 52; the sampling port A 51 and the sampling port B 52 are provided with an electrically controlled valve 53 for controlling the on and off; the cooling protective cover 3 is installed on the robotic arm 2, and the cold air control system 4 is connected to the cooling protective cover 3 to cool the U-shaped monitoring tube 1. The U-shaped monitoring tube 1 is installed at the front end of the robot arm 2, and then the robot arm 2 is controlled to move the U-shaped monitoring tube 1 so that the two ends of the U-shaped monitoring tube 1 are connected to the connecting hose 6 set on the sampling port A 51 and the sampling port B 52; the pressure applied by the robot arm 2 is used to press the U-shaped monitoring tube 1 on the connecting hose 6, and the elasticity of the connecting hose 6 can make the connection tight to avoid air leakage, and then the electric control valve 53 is controlled to open to allow superheated steam to pass through the U-shaped monitoring tube 1 and keep the U-shaped monitoring tube 1 in a working state. When it is necessary to detect and analyze the steam quality, the electric control valve 53 is controlled to close, and the U-shaped monitoring tube 1 is moved out of the connecting hose 6 by the robot arm 2, and then the cooling protective cover 3 is covered on the U-shaped monitoring tube 1, and cold air is filled into the cooling protective cover 3 through the cold air control system 4 , so that the U-shaped monitoring tube 1 is cooled to the temperature when the boiler 5 is shut down, ensuring the representativeness of the sample of the U-shaped monitoring tube 1 taken out; then the cooling protective cover 3 is opened, and the U-shaped monitoring tube 1 is taken down from the mechanical arm 2 for detection and analysis; the U-shaped monitoring tube 1 can be automatically taken out and detected and analyzed by the mechanical arm 2, and the U-shaped monitoring tube 1 can be taken out at any time for detection and analysis according to the actual working condition of the boiler 5, so as to check the working status of the boiler 5 and the quality of the steam in real time, so as to timely inspect and adjust the boiler 5, and prevent possible hazards to the boiler 5, without waiting for the boiler 5 to be shut down for inspection; the mechanical arm 2 can intelligently control the docking and removal of the U-shaped monitoring tube 1 and the superheated steam header 6 in the boiler 5, thereby improving the convenience of the detection and analysis of the U-shaped monitoring tube 1.
[0027] like Figure 3-4As shown, the mechanical arm 2 includes an L-shaped fixed arm 21 and a movable arm 22; one end of the fixed arm 21 is fixedly connected to the furnace wall of the boiler 5, and the movable arm 22 is vertically connected to the end of the fixed arm 21, and the U-shaped monitoring tube 1 is installed on the clamping mechanism 23 provided at the movable end of the movable arm 22. When the mechanical arm 2 moves the U-shaped monitoring tube 1, the U-shaped monitoring tube 1 is installed on the clamping mechanism 23, and then the U-shaped monitoring tube 1 is moved by the movable arm 22, so that the U-shaped monitoring tube 1 moves in the horizontal plane. The mechanical arm 2 is installed on the furnace wall of the boiler 5 at a level with the sampling port A 51 and the sampling port B 52, and the U-shaped monitoring tube 1 can be docked with the connecting hose 6 on the sampling port A 51 and the sampling port B 52 through horizontal movement.
[0028] like Figure 5 As shown, the clamping mechanism 23 includes a U-shaped fixing groove 231, a fixing plate 232, and a fixing bolt 233; the fixing groove 231 is installed at the moving end of the moving arm 22, the fixing bolt 233 is threadedly installed on a side plate of the fixing groove 231, the fixing plate 232 is located in the fixing groove 231, and is rotatably connected to the end of the fixing bolt 233, and the U-shaped monitoring tube 1 is clamped and fixed between the side plate in the fixing groove 231 and the fixing plate 232. When the U-shaped monitoring tube 1 is installed on the clamping mechanism 23, the middle part of the U-shaped monitoring tube 1 is clamped between the side plate in the fixing groove 231 and the fixing plate 232, and then the fixing bolt 233 is rotated to move the fixing plate 232 to press on the U-shaped monitoring tube 1, thereby fixing the U-shaped monitoring tube 1, so that the U-shaped monitoring tube 1 remains horizontal, with both ends facing the side of the connecting hose 6.
[0029] like Figure 5 As shown, the side plates of the fixing groove 231 and the fixing plate 232 are provided with arc grooves 234 for clamping and fixing the U-shaped monitoring tube 1. Fixing the U-shaped monitoring tube 1 in the arc groove 234 can make the U-shaped monitoring tube 1 more stably fixed, prevent movement, and facilitate docking with the connecting hose 6.
[0030] like Figure 5 As shown, the end of the connecting hose 6 is configured as a trumpet-shaped structure for easy docking with the U-shaped monitoring tube 1. When the U-shaped monitoring tube 1 is docked with the connecting hose 6, both ends of the U-shaped monitoring tube 1 are inserted into the trumpet-shaped connecting hose 6, thereby facilitating the connection of the U-shaped monitoring tube 1 and improving the accuracy and efficiency of docking.
[0031] like Figure 4As shown, the cooling protective cover 3 includes an upper cover body 31 and a lower cover body 32 which are covered together, and the U-shaped monitoring tube 1 is covered inside; the upper cover body 31 and the lower cover body 32 are respectively connected to the opening and closing mechanism 34 installed on the fixed arm 21 through a connecting rod 33. When the mechanical arm 2 takes out the U-shaped monitoring tube 1, the upper cover body 31 and the lower cover body 32 are controlled to move relative to each other through the opening and closing mechanism 34, and the U-shaped monitoring tube 1 is covered inside. The upper cover body 31 and the lower cover body 32 of the cooling protective cover 3 are made of heat-insulating porcelain materials, which is convenient for maintaining a low temperature in the cooling protective cover 3. The cold air control system 4 fills cold air into the cooling protective cover 3, so that the temperature of the U-shaped monitoring tube 1 is reduced until the boiler 5 stops operating, which is convenient for cutting the U-shaped monitoring tube 1 for detection and analysis.
[0032] like Fig. 9 As shown, the cold air control system 4 includes a temperature sensor 41, an air cooler 42, and a control chip 43. The control chip 43 uses a single-chip microcomputer of model STM32F103C8T6. The air cooler 42 is connected to the upper cover body 31 through a cold air inlet pipe 44, and an air outlet pipe 45 is connected to the lower cover body 32; the temperature sensor 41 is installed at the end of a spring telescopic rod 321 arranged in the lower cover body 32, the temperature sensor 41 contacts the side wall of the U-shaped monitoring tube 1, and the temperature sensor 41 is electrically connected to the control chip 43; the control chip 43 is also electrically connected to the control switch of the air cooler 42, and the control chip 43 is also electrically connected to a display screen 46 for displaying the temperature value of the temperature sensor 41. Start the air cooler 42 to continuously fill the cooling protective cover 3 with cold air through the cold air inlet pipe 44, and let the cold air flow out from the air outlet pipe 45, so that the cooling protective cover 3 can maintain a low temperature continuously, which is convenient for cooling the U-shaped monitoring tube 1. When the upper cover body 31 and the lower cover body 32 are covered on the U-shaped monitoring tube 1, the temperature sensor 41 is tightly attached to the U-shaped monitoring tube 1 under the elastic force of the spring telescopic rod 321, so as to facilitate monitoring the temperature of the U-shaped monitoring tube 1 and avoid deviation. The temperature sensor 41 transmits the temperature of the U-shaped monitoring tube 1 to the control chip 43 and displays it on the display screen 46, so as to facilitate checking the temperature of the U-shaped monitoring tube 1. When the temperature of the U-shaped monitoring tube 1 drops to a predetermined temperature, the control chip 43 controls the air cooler 42 to stop filling with cold air, and then opens the cooling protective cover 3, takes out the U-shaped monitoring tube 1 and performs inspection.
[0033] like Figure 6As shown, the opening and closing mechanism 34 includes two slide grooves 341, two sliders 342, a screw rod I 343, and a motor I 344; the two slide grooves 341 are respectively installed on the upper and lower sides of the fixed arm 21, and overlap in the vertical direction; the two sliders 342 are respectively slidably installed in the two slide grooves 341; the screw rod I 343 is installed in the two slide grooves 341, and the two ends are respectively rotatably connected to the ends of the two slide grooves 341, and the middle part is rotatably installed on the fixed arm 21 and threadedly connected with the two sliders 342; the motor I 344 is installed at the upper end of the slide groove 341 and is transmission connected with the screw rod I 343, and the screw thread of the screw rod I 343 in the two slide grooves 341 has opposite spiral directions, and the upper cover body 31 and the lower cover body 32 are respectively connected to the two sliders 342 through the connecting rod 33. When the machine takes the U-shaped monitoring tube 1 out of the boiler 5, the upper cover body 31 and the lower cover body 32 are moved by the opening and closing mechanism 34 to cover the U-shaped monitoring tube 1, and the motor Ⅰ344 drives the screw rod Ⅰ343 to rotate, so that the two sliders 342 and the screw rod Ⅰ343 rotate in thread. Since the screw threads of the screw rod Ⅰ343 in the two slide grooves 341 are in opposite directions, the two sliders 342 move relative to each other in the slide grooves 341, thereby driving the upper cover body 31 and the lower cover body 32 to move relative to each other through the connecting rod 33, covering the U-shaped monitoring tube 1 inside, and cooling the U-shaped monitoring tube 1.
[0034] like Figure 7 As shown, the movable arm 22 comprises a fixed sleeve 221, a square telescopic rod 222, a screw II 223, and a motor II 224; the side wall of the fixed sleeve 221 of the movable arm 22 is connected to the end of the fixed arm 21, the square telescopic rod 222 is slidably sleeved in the fixed sleeve 221, the screw II 223 is rotatably installed in the fixed sleeve 221 through a bearing, and is threadedly connected to the square telescopic rod 222, the motor II 224 is installed at the end of the fixed sleeve 221 and is transmission-connected to the screw II 223; the clamping mechanism 24 is connected to the end of the square telescopic rod 222 of the movable arm 22. When the movable arm 22 moves the U-shaped monitoring tube 1, the screw II 223 is driven to rotate by the motor II 224, so that the square telescopic rod 222 is telescopically moved in the fixed sleeve 221, thereby driving the U-shaped monitoring tube 1 to move in the horizontal plane, so that the U-shaped monitoring tube 1 is docked on the sampling port A 51 and the sampling port B 52.
[0035] The monitoring method based on the above-mentioned intelligent timely U-tube monitoring device for superheater of power station boiler 5 comprises the following steps; S1, install the U-shaped monitoring tube 1 on the end of the mechanical arm 2 through the clamping mechanism 24; S2, the U-shaped monitoring tube 1 is moved by the mobile mechanical arm 2 and the two ends are docked on the connecting hose 6 provided on the sampling port A 51 and the sampling port B 52, and the sampling port A 51 and the sampling port B 52 are opened by the electric control valve 53 to allow the superheated steam to pass through the U-shaped monitoring tube 1; S3, after the U-shaped monitoring tube 1 has been working for a period of time, the U-shaped monitoring tube 1 is removed from the connecting hose 6 by the mechanical arm 2; S4, then use the cooling protection cover 3 on the robot arm 2 to cover the U-shaped monitoring tube 1, and fill the cooling protection cover 3 with cold air through the cold air control system 4 to cool the U-shaped monitoring tube 1 to the temperature when the boiler 5 is shut down; S5, open the cooling protective cover 3, take out the U-shaped monitoring tube 1 from the mechanical arm 2, and then cut, inspect and analyze the U-shaped monitoring tube 1 to determine the steam quality.
[0036] Example 2 A single 660MW coal-fired power generation unit in Chongqing is an ultra-supercritical pressure direct current furnace. Before the implementation of the present invention, the monitoring tube was welded to the relevant water vapor system during the unit maintenance, and effective monitoring could not be performed during normal operation. After the implementation of the present invention, the operation of the superheated steam pipe can be supervised in a timely manner, and the actual operation status of the boiler 5 can be controlled during operation, which is convenient for timely adjustment and control of the water vapor quality, and effectively avoids the problem of boiler 5 tube burst and rapid salt accumulation in the turbine.
[0037] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.
Claims
1. An intelligent timely U-tube monitoring device for a power station boiler superheater, characterized in that: The invention comprises a U-shaped monitoring tube (1), a mechanical arm (2), a cooling protection cover (3), and a cold air control system (4); the mechanical arm (2) is mounted on the furnace wall of a boiler (5); the U-shaped monitoring tube (1) is clamped and fixed at the end of the mechanical arm (2); the two ends of the U-shaped monitoring tube (1) are butt-jointed to a sampling port A (51) and a sampling port B (52) provided on the outer wall of the boiler (5); the sampling port A (51) and the sampling port B (52) are respectively connected to a low-temperature superheated steam header and a high-temperature superheated steam header in the boiler through pipelines; the sampling port A (51) and the sampling port B (52) are connected to the low-temperature superheated steam header and the high-temperature superheated steam header in the boiler through pipelines; A connecting hose (6) is fixedly connected to the two ends of the U-shaped monitoring tube (1), and the connecting hose (6) is made of a high-temperature silicone material that is resistant to high temperatures and high pressures; the mechanical arm (2) moves the U-shaped monitoring tube (1) and docks the two ends of the connecting hose (6) on the sampling port A (51) and the sampling port B (52); the sampling port A (51) and the sampling port B (52) are provided with an electric control valve (53) for controlling on and off; the cooling protection cover (3) is installed on the mechanical arm (2), and the cold air control system (4) is connected to the cooling protection cover (3) to cool the U-shaped monitoring tube (1).
2. The intelligent timely U-tube monitoring device for a power station boiler superheater according to claim 1 is characterized by: The mechanical arm (2) comprises an L-shaped fixed arm (21) and a movable arm (22); one end of the fixed arm (21) is fixedly connected to the furnace wall of the boiler (5), the movable arm (22) is vertically connected to the end of the fixed arm (21), and the U-shaped monitoring tube (1) is installed on a clamping mechanism (23) provided at the movable end of the movable arm (22).
3. The intelligent timely U-tube monitoring device for a power station boiler superheater according to claim 2 is characterized by: The clamping mechanism (23) comprises a U-shaped fixing groove (231), a fixing plate (232), and a fixing bolt (233); the fixing groove (231) is installed at the moving end of the moving arm (22); the fixing bolt (233) is threadedly installed on a side plate of the fixing groove (231); the fixing plate (232) is located in the fixing groove (231) and is rotatably connected to the end of the fixing bolt (233); the U-shaped monitoring tube (1) is clamped and fixed between the side plate in the fixing groove (231) and the fixing plate (232).
4. The intelligent timely U-tube monitoring device for a power station boiler superheater according to claim 3 is characterized by: The side plates of the fixing groove (231) and the fixing plate (232) are provided with arc-shaped grooves (234) for clamping and fixing the U-shaped monitoring tube (1).
5. The intelligent timely U-tube monitoring device for a power station boiler superheater according to any one of claims 1 to 4, characterized in that: The end of the connecting hose (6) is configured as a trumpet-shaped structure for easy docking with the U-shaped monitoring tube (1).
6. The intelligent timely U-tube monitoring device for a power station boiler superheater according to claim 5 is characterized by: The cooling protection cover (3) comprises an upper cover body (31) and a lower cover body (32) which are covered together, and the U-shaped monitoring tube (1) is covered inside; the upper cover body (31) and the lower cover body (32) are respectively connected to an opening and closing mechanism (34) installed on the fixed arm (21) through a connecting rod (33).
7. The intelligent timely U-tube monitoring device for a power station boiler superheater according to claim 6 is characterized by: The cold air control system (4) comprises a temperature sensor (41), a cold air blower (42), and a control chip (43); the cold air blower (42) is connected to the upper housing (31) via a cold air inlet pipe (44); and the lower housing (32) is connected to an air outlet pipe (45); the temperature sensor (41) is mounted on the end of a spring telescopic rod (321) provided in the lower housing (32); the temperature sensor (41) contacts the side wall of the U-shaped monitoring tube (1); the temperature sensor (41) is electrically connected to the control chip (43); the control chip (43) is also electrically connected to a control switch of the cold air blower (42); and the control chip (43) is also electrically connected to a display screen (46) for displaying a temperature value of the temperature sensor (41).
8. The intelligent timely U-tube monitoring device for a power station boiler superheater according to claim 6 is characterized by: The opening and closing mechanism (34) comprises two slide grooves (341), two sliders (342), a screw rod I (343), and a motor I (344); the two slide grooves (341) are respectively mounted on the upper and lower sides of the fixed arm (21) and overlap in the vertical direction; the two sliders (342) are respectively slidably mounted in the two slide grooves (341); the screw rod I (343) is mounted in the two slide grooves (341), the two ends are respectively rotatably connected to the ends of the two slide grooves (341), and the middle part is rotatably mounted on the fixed arm (21) and threadedly connected to the two sliders (342); the motor I (344) is mounted on the upper end of the slide groove (341) and is transmission-connected to the screw rod I (343), and the screw threads of the screw rod I (343) in the two slide grooves (341) have opposite spiral directions.
9. The intelligent timely U-tube monitoring device for a power station boiler superheater according to any one of claims 2, 3, 4, 5 and 7, characterized in that: The movable arm (22) comprises a fixed sleeve (221), a square telescopic rod (222), a screw rod II (223), and a motor II (224); the side wall of the fixed sleeve (221) of the movable arm (22) is connected to the end of the fixed arm (21); the square telescopic rod (222) is slidably sleeved in the fixed sleeve (221); the screw rod II (223) is rotatably mounted in the fixed sleeve (221) via a bearing and is threadedly connected to the square telescopic rod (222); the motor II (224) is mounted at the end of the fixed sleeve (221) and is transmission-connected to the screw rod II (223); the clamping mechanism (24) is connected to the end of the square telescopic rod (222) of the movable arm (22).
10. The monitoring method of the intelligent timely U-tube monitoring device for a power station boiler superheater according to claim 1, characterized in that: The method comprises the following steps: S1, installing the U-shaped monitoring tube (1) on the end of the mechanical arm (2) through a clamping mechanism (24); S2, moving the U-shaped monitoring tube (1) by moving the mechanical arm (2) and docking the two ends of the U-shaped monitoring tube (1) with the connecting hose (6) provided on the sampling port A (51) and the sampling port B (52), and opening the sampling port A (51) and the sampling port B (52) by the electric control valve (53), so that the superheated steam passes through the U-shaped monitoring tube (1); S3, after the U-shaped monitoring tube (1) has been working for a period of time, the U-shaped monitoring tube (1) is removed from the connecting hose (6) by the mechanical arm (2); S4, then using the cooling protective cover (3) on the mechanical arm (2) to cover the U-shaped monitoring tube (1), and charging cold air into the cooling protective cover (3) through the cold air control system (4), so that the temperature of the U-shaped monitoring tube (1) is reduced to the temperature when the boiler (5) is shut down; S5, opening the cooling protective cover (3), taking out the U-shaped monitoring tube (1) from the mechanical arm (2), and then cutting, inspecting and analyzing the U-shaped monitoring tube (1) to determine the steam quality.