Thermal power generating unit thermotechnical monitoring structure
By designing a thermal power unit thermal monitoring structure with lifting, moving, and rotating units inside the boiler tail flue, the problem of insufficient temperature measurement points was solved, achieving high accuracy and representativeness of multi-point temperature measurement, reducing costs and extending equipment life.
Patent Information
- Application Number
- CN202423178552.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2034-12-23
AI Technical Summary
The limited number of temperature and oxygen measurement points in the boiler tail flue makes the measurements unrepresentative and unable to accurately reflect the boiler's operating level.
Design a thermal monitoring structure for thermal power units, including lifting, moving and rotating units, combined with temperature sensors, to perform measurements at any position inside the flue. Through the coordinated use of the lifting, moving and rotating units, multi-point temperature measurement is achieved, and a cleaning component is provided to maintain sensor accuracy.
It increases the number of temperature measurement points and the accuracy of data, meets the requirements of grid sampling, reduces installation costs, and extends the service life of the equipment.
Smart Images
Figure CN223512832U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to thermal power generating unit technical field, concretely is a thermal power generating unit thermal monitoring structure. BACKGROUND
[0002] Coal-fired power generation is the largest power form in China's power system, and the boiler is the core equipment for converting the chemical energy of fuel (coal) into heat energy and further realizing heat transfer in the coal-fired power generation system. In the boiler system, the oxygen content and exhaust gas temperature at the inlet and outlet of the air preheater at the tail of the boiler have been the key indicators for measuring the efficiency of the boiler. However, due to the large width of the tail flue of the boiler, the temperature and oxygen content of the flue gas in the tail flue also deviate objectively, which leads to the fact that the temperature and oxygen content measurement is not very representative. According to the "Power Station Boiler Performance Test Regulations" (GB10184-2015), the grid method should be used for sampling analysis of the exhaust gas temperature and oxygen content at the tail flue of the boiler. In the performance test process, the grid method is relatively easy to implement. However, in the actual monitoring process on site, usually 1-2 temperature measuring points and 1-2 oxygen content measuring points are set in the tail flue, and the measuring point positions are fixed and unchanged, which far fails to meet the requirements of the grid sampling analysis, which leads to the fact that the representative of the actual monitored oxygen content and temperature is not strong, and the actual operation level of the boiler cannot be truly reflected, and only the trend reference can be provided. SUMMARY
[0003] In view of the deficiencies of the prior art, the utility model provides a thermal power generating unit thermal monitoring structure, which solves the technical problem of fewer temperature measuring points in the flue pipe.
[0004] To solve the above technical problems, the utility model provides the following technical scheme: a thermal power generating unit thermal monitoring structure, which comprises an outer shell mounted on the outer wall of a flue pipe, a lifting unit is arranged in the outer shell, the lifting unit extends into the flue pipe and is fixed with a cross arm through a connecting piece, a moving unit is mounted on the cross arm, a rotating unit connected with the moving unit is slidingly arranged at the bottom of the cross arm, and a reinforcing unit is fixed between the lifting unit and the cross arm.
[0005] The rotating unit comprises a sliding seat slidingly arranged at the bottom of the cross arm, a motor three is mounted on the side wall of the sliding seat, a gear two is fixed on the output shaft of the motor three, a gear three is arranged on one side of the gear two and engaged with the gear two, the gear three is rotatably connected to the bottom of the sliding seat through a rotating shaft, a rotating arm is fixed on the bottom of the gear three, a temperature sensor is mounted on one end of the rotating arm, and a cleaning assembly is mounted on the position close to the temperature sensor of the rotating arm.
[0006] Preferably, the cleaning assembly comprises an electric push rod mounted at one end of the rotating arm, and a cleaning ring is fixed on the extension shaft of the electric push rod.
[0007] Preferably, the cross arm is in the same vertical plane as the center line of the flue pipe.
[0008] Preferably, the lifting unit comprises a motor one mounted on the shell, a gear one fixed on the output shaft of the motor one, a toothed rod provided on one side of the gear one and engaged with the gear one, the toothed rod penetrating through the shell and extending into the flue pipe, and the bottom of the toothed rod being fixedly connected with the cross arm through a connecting piece.
[0009] Preferably, the moving unit comprises sprockets rotatably connected at two ends of the cross arm, a chain transmission connected between the two sprockets, the bottom of the chain being fixedly connected with the sliding seat, and a motor two being mounted at one end of the cross arm and connected with one of the sprockets.
[0010] Preferably, the reinforcing unit comprises a connecting block fixedly connected with the bottom of the toothed rod, and reinforcing rods fixedly connected with the side walls at the two ends of the cross arm at two ends of the connecting block.
[0011] By the above technical scheme, the utility model provides a thermal monitoring structure of thermal power generating unit, at least has the following beneficial effects:
[0012] 1. The thermal monitoring structure of thermal power generating unit, through setting lifting unit, moving unit and rotating unit, through the cooperation between each unit, the temperature sensor can measure at any position in the flue pipe, which can greatly improve the number of temperature measurement points, so as to meet the sampling data requirement of grid method, can improve the accuracy and representativeness of data, at the same time, without increasing the temperature monitoring unit, the installation cost is low, the practicality is high, and it is worth popularizing and using.
[0013] 2. The thermal monitoring structure of thermal power generating unit, through setting reinforcing unit, the connecting strength between the connecting piece and the cross arm can be improved, the problem of stress concentration between the connecting piece and the cross arm when the rotating unit moves to the position of the two ends of the cross arm can be avoided, so that the service life of the whole is improved. BRIEF DESCRIPTION OF DRAWINGS
[0014] The drawings described herein are used to provide further understanding of the utility model and constitute a part of this application:
[0015] Figure 1 It is the three-dimensional structure schematic diagram of the whole installation of the utility model;
[0016] Figure 2 It is the structure schematic diagram of the flue pipe inside the utility model;
[0017] Figure 3 It is the structure schematic diagram of the whole monitoring structure of the utility model;
[0018] Figure 4 It is the structure schematic diagram of the rotating unit of the utility model;
[0019] Reference signs:
[0020] 1, flue pipe; 2, shell; 3, lifting unit; 301, motor one; 302, gear one; 303, rack; 4, connecting piece; 5, cross arm; 6, moving unit; 601, motor two; 603, chain wheel; 604, chain; 7, rotating unit; 701, sliding seat; 702, motor three; 703, gear two; 704, gear three; 705, rotating arm; 706, temperature sensor; 707, cleaning assembly; 7071, electric push rod; 7072, cleaning ring; 8, reinforcing unit; 801, connecting block; 802, reinforcing rod. DETAILED DESCRIPTION
[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0022] A thermal power unit, commonly referred to as a generator set used by a thermal power plant, its main working principle is to use the burning of fossil fuels (such as coal, oil or natural gas) to generate heat energy, through a series of conversion processes to generate electricity. The main components of the thermal power unit include a boiler, a steam engine, a turbine generator, a cooling system, a flue gas treatment system and a control system, among which the boiler is the core equipment of the thermal power unit, responsible for the combustion of fuel and the conversion of heat energy generated by combustion into water vapor. The boiler produces high-temperature and high-pressure steam by heating water.
[0023] Based on the technical defects of the existing technology that there are fewer temperature measurement points in the flue pipe 1, please refer to Figures 1-4The utility model provides a kind of thermal power unit thermal monitoring structure, temperature sensor 706 can be measured at the arbitrary position inside flue pipe 1, so it can greatly improve the quantity of temperature measuring point, to comply with the sampling data requirement of grid method, can improve the accuracy and representativeness of data, simultaneously without increasing redundant temperature monitoring unit, installation cost is low, high practicality, the monitoring structure includes the shell installed on the outer wall of flue pipe 1, shell is provided with lifting unit 3, lifting unit 3 extends to flue pipe 1 and is fixed with cross arm 5 by connecting piece 4, cross arm 5 is installed with moving unit 6, the bottom of cross arm 5 is slidably provided with the rotating unit 7 connected with moving unit 6, lifting unit 3 and cross arm 5 between still fixed with reinforcing unit 8;When using, the whole monitoring structure is installed to flue pipe 1, by the cooperation between lifting unit 3, moving unit 6 and rotating unit 7, temperature sensor 706 can be measured at the arbitrary position inside flue pipe 1, so it can greatly improve the quantity of temperature measuring point.
[0024] When monitoring temperature in flue pipe 1, temperature monitoring needs to be carried out from multiple points of horizontal plane, to achieve this purpose, please refer to Figure 4 Rotating unit 7 includes sliding seat 701 slidably arranged at the bottom of cross arm 5, motor three 702 is installed on the side wall of sliding seat 701, gear two 703 is fixed on the output shaft of motor three 702, gear three 704 is provided on one side of gear two 703 and is engaged with gear two 703, gear three 704 is rotatably connected to the bottom of sliding seat 701 through rotating shaft, rotating arm 705 is fixed on the bottom of gear three 704, temperature sensor 706 is installed on one end of rotating arm 705, and cleaning assembly 707 is installed on the position close to temperature sensor 706 of rotating arm 705;Motor three 702 is used to work and rotate rotating arm 705 through the meshing action of gear two 703 and gear three 704, temperature sensor 706 is moved horizontally by rotating arm 705, so that monitoring work can be carried out at any position of horizontal plane.
[0025] Because flue gas in flue pipe 1 contains smoke dust, when temperature sensor 706 is monitored, smoke dust will adhere to temperature sensor 706, so as to cause the detection accuracy of temperature sensor 706 to decrease, to solve this problem, please refer to Figure 4 Cleaning assembly 707 includes electric push rod 7071 installed at one end of rotating arm 705, cleaning ring 7072 is fixed on the telescopic shaft of electric push rod 7071, and cleaning ring 7072 is sleeved on the outer wall of temperature sensor 706;Electric push rod 7071 is used to work and move cleaning ring 7072, cleaning ring 7072 scrapes off the smoke dust adhered to temperature sensor 706, so as to ensure that temperature sensor 706 is used normally.
[0026] Since the flue pipe 1 is generally tubular, if the temperature at any position in the flue pipe 1 is to be monitored, the cross arm 5 needs to be in the same vertical plane as the center line of the flue pipe 1; the purpose of such design is that the rotating unit can drive the temperature sensor 706 to move to both sides by the same distance, so as to maximize the monitoring range.
[0027] When the temperature in the flue pipe 1 is monitored, the temperature needs to be monitored from multiple horizontal planes formed vertically, in order to achieve this purpose, please refer to Figure 3 The lifting unit 3 comprises a motor one 301 mounted on the shell, a gear one 302 fixed on the output shaft of the motor one 301, a toothed rod 303 provided on one side of the gear one 302 and engaged with the gear one 302, the toothed rod 303 penetrating through the shell 2 and extending into the flue pipe 1, and the toothed rod 303 being fixedly connected with the cross arm 5 through the connecting piece 4; the motor one 301 is used to work and drive the entire cross arm 5 to move up and down through the meshing action of the gear one 302 and the toothed rod 303, at this time the temperature sensor 706 can monitor the temperature of multiple horizontal planes formed vertically.
[0028] Since the flue pipe 1 has a certain length, the temperature at different positions needs to be monitored, in order to achieve this purpose, please refer to Figure 3 The moving unit 6 comprises two sprockets 603 rotatably connected at both ends of the cross arm 5, the two sprockets 603 being drivingly connected through a chain 604, the bottom of the chain 604 being fixedly connected with the sliding seat 701, and one end of the cross arm 5 being provided with a motor two 601 connected with one of the sprockets 603; the motor two 601 is used to work and drive the sprockets 603 to rotate, the sprockets 603 drive the chain 604 to move, and the chain 604 drives the entire rotating unit to move forward and backward, so as to monitor the temperature at any position of the flue pipe 1.
[0029] Since the cross arm 5 has a certain length, when the rotating unit moves to both ends of the cross arm 5, the weight of one end of the cross arm 5 is increased, at this time the center of gravity is inclined to one side, which will cause stress concentration at the connection position of the connecting piece 4 and the cross arm 5, and long-term use will cause the connection position to be broken, in order to avoid this problem, please refer to Figure 3 The reinforcing unit 8 comprises a connecting block 801 fixedly connected at the bottom of the toothed rod 303, and reinforcing rods 802 fixedly connected with the side walls at both ends of the cross arm 5 at both ends of the connecting block 801; by arranging the reinforcing unit 8, the connection strength between the connecting piece 4 and the cross arm 5 can be improved, the problem of stress concentration between the connecting piece 4 and the cross arm 5 caused by the movement of the rotating unit 7 to the positions at both ends of the cross arm 5 can be avoided, and thus the service life of the whole is improved.
[0030] It is to be understood that the terms "including", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.
[0031] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.
Claims
1. A thermal monitoring structure for a thermal power unit, comprising a housing mounted on the outer wall of a flue pipe (1), characterized in that: The shell is internally provided with a lifting unit (3), the lifting unit (3) extends into the flue pipe (1) and is fixed with a cross arm (5) through a connecting piece (4), a moving unit (6) is installed on the cross arm (5), a rotating unit (7) connected with the moving unit (6) is slidingly arranged at the bottom of the cross arm (5), and a reinforcing unit (8) is further fixed between the lifting unit (3) and the cross arm (5); The rotating unit (7) comprises a sliding seat (701) slidingly arranged at the bottom of the cross arm (5), a motor three (702) is installed on the side wall of the sliding seat (701), a gear two (703) is fixed on the output shaft of the motor three (702), a gear three (704) is arranged on one side of the gear two (703) and is engaged with the gear two (703), the gear three (704) is rotatably connected to the bottom of the sliding seat (701) through a rotating shaft, a rotating arm (705) is fixed on the bottom of the gear three (704), a temperature sensor (706) is installed at one end of the rotating arm (705), and a cleaning assembly (707) is installed at a position close to the temperature sensor (706) of the rotating arm (705).
2. The thermal monitoring structure of a thermal power generating unit according to claim 1, characterized in that: The cleaning assembly (707) comprises an electric push rod (7071) installed at one end of the rotating arm (705), and a cleaning ring (7072) is fixed on the telescopic shaft of the electric push rod (7071), the cleaning ring (7072) is sleeved on the outer wall of the temperature sensor (706).
3. The thermal monitoring structure of a thermal power generating unit according to claim 1, characterized in that: The cross arm (5) and the center line of the flue pipe (1) are located on the same vertical plane.
4. The thermal monitoring structure of a thermal power generating unit according to claim 1, characterized in that: The lifting unit (3) comprises a motor one (301) installed on the shell, a gear one (302) is fixed on the output shaft of the motor one (301), a toothed rod (303) is arranged on one side of the gear one (302) and is engaged with the gear one (302), the toothed rod (303) penetrates through the shell (2) and extends into the flue pipe (1), and the bottom of the toothed rod (303) is fixedly connected with the cross arm (5) through the connecting piece (4).
5. The thermal monitoring structure of a thermal power generating unit according to claim 1, characterized in that: The moving unit (6) comprises a sprocket (603) rotatably connected at both ends of the cross arm (5), the two sprockets (603) are drivingly connected through a chain (604), the bottom of the chain (604) is fixedly connected with the sliding seat (701), and a motor two (601) connected with one of the sprockets (603) is installed at one end of the cross arm (5).
6. The thermal monitoring structure of a thermal power generating unit according to claim 1, characterized in that: The reinforcing unit (8) comprises a connecting block (801) fixedly connected at the bottom of the toothed rod (303), and the connecting block (801) is fixedly connected with the side walls at both ends of the cross arm (5) through reinforcing rods (802).