A flame detector for power plants

Abstract

The utility model relates to flame detector technical field discloses a kind of thermal power plant anti-interference flame detectors, including mounting plate, the mounting plate inner wall is fixedly connected with protective shell, the protective shell inner wall is fixedly connected with detector main body, the detector main body rear end is fixedly connected with lens, the mounting plate inner wall is fixedly connected with pivot, the pivot is connected with scraper by cleaning component, the scraper is located the lens rear end, the mounting plate front end is fixedly connected with water tank, the water tank right end inner wall is fixedly connected with multiple heat dissipation fins, the water tank front end is fixedly connected with pump body, the pump body is connected with detector main body by cooling component. In the utility model, back and forth movement of scraper, dust on lens is scraped, prevent lens dust accumulation make infrared sensor's detection distance shorten, and by pump body, water is sent to annular water pipe, detector main body is cooled, avoid the internal components of detector main body due to high temperature and lead to detection precision decline.

Description

Technical Field

[0001] This utility model relates to the field of flame detector technology, and in particular to an anti-interference flame detector for thermal power plants. Background Technology

[0002] In the operation of thermal power plants, flame detection is a crucial link in ensuring the safe and stable operation of boilers. As a core device, the flame detector needs to monitor the state of the combustion flame in the furnace in real time and accurately (such as the presence or absence of flame, flame intensity, combustion stability, etc.). Once an abnormal flame is detected (such as flameout), it must be promptly fed back to the control system to trigger corresponding protective measures (such as cutting off fuel supply, activating interlock protection, etc.) to avoid serious safety accidents such as furnace explosions and equipment damage.

[0003] There is a large amount of smoke and dust generated during combustion in the furnace of a thermal power plant boiler. These impurities easily adhere to the lens of the flame detector. Dust accumulation on the lens will reduce the light transmittance, weaken the intensity of the flame signal received by the sensor, directly shorten the detection distance, and may even prevent the detection of normal flames.

[0004] In response to the technical problem that dust accumulation on the lens of a flame detector leads to a decrease in detection accuracy, this application proposes an anti-interference flame detector for thermal power plants. Utility Model Content

[0005] The purpose of this invention is to address the drawback of flame detector lenses being prone to dust accumulation, which leads to a decrease in detection accuracy. This invention proposes an anti-interference flame detector for thermal power plants, which uses a scraper that moves back and forth to remove dust from the lens, preventing dust accumulation from shortening the detection distance of the infrared sensor. Additionally, a pump delivers water to a ring-shaped water pipe to cool the detector body, preventing internal components from experiencing a decrease in detection accuracy due to high temperatures.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an anti-interference flame detector for thermal power plants, comprising a mounting plate, a protective shell fixedly connected to the inner wall of the mounting plate, a detector body fixedly connected to the inner wall of the protective shell, a lens fixedly connected to the rear end of the detector body, a rotating shaft fixedly connected to the inner wall of the mounting plate, the rotating shaft being connected to a scraper via a cleaning assembly, the scraper being located at the rear end of the lens, a water tank fixedly connected to the front end of the mounting plate, multiple heat dissipation fins fixedly connected to the inner wall of the right end of the water tank, a pump body fixedly connected to the front end of the water tank, and the pump body being connected to the detector body via a cooling assembly.

[0007] Furthermore, the cleaning assembly includes a turntable fixedly connected to the rear end of the rotating shaft, a control column fixedly connected to the eccentric rear end of the turntable, and a rotating rod rotatably connected to the outer wall of the control column.

[0008] Furthermore, a movable rod is rotatably connected to the other end of the rotating rod, and the left end of the movable rod is fixedly connected to the right end of the scraper.

[0009] Furthermore, a limiting block is fixedly connected to the rear end of the mounting plate, and the outer wall of the moving rod is slidably connected to the inner wall of the limiting block.

[0010] Furthermore, the cooling assembly includes a water inlet pipe fixedly connected to the front end of the pump body, and an annular water pipe fixedly connected to the other end of the water inlet pipe, the annular water pipe surrounding the outer wall of the detector body.

[0011] Furthermore, a water outlet pipe is fixedly connected to the other end of the annular water pipe, and the other end of the water outlet pipe is fixedly connected to the front end of the water tank.

[0012] Furthermore, a support frame is fixedly connected to the right end of the water tank, the heat dissipation fins are located inside the support frame, and a fan is fixedly connected to the inner wall of the right end of the support frame.

[0013] Furthermore, a motor is fixedly connected to the front end of the mounting plate, and the front end of the rotating shaft is fixedly connected to the motor drive end.

[0014] This utility model has the following beneficial effects:

[0015] 1. In this utility model, the rotating shaft is driven by a motor, which in turn rotates the turntable, causing the scraper to move back and forth to scrape away the dust on the lens, preventing dust accumulation on the lens from shortening the detection distance of the infrared sensor and ensuring the stability of the detector body.

[0016] 2. In this utility model, water in the water tank is pumped to the annular water pipe by the pump body, and then the annular water pipe cools down the detector body, so as to avoid the internal components of the detector body from decreasing the detection accuracy due to high temperature, thereby reducing the risk of equipment shutdown or false alarm caused by overheating from the source and reducing the risk of equipment failure. Attached Figure Description

[0017] Figure 1 This is a perspective view of an anti-interference flame detector for thermal power plants proposed in this utility model;

[0018] Figure 2 This is a schematic diagram of a turntable for an anti-interference flame detector for thermal power plants proposed in this utility model.

[0019] Figure 3 This is a cross-sectional view of a protective shell for an anti-interference flame detector for a thermal power plant, as proposed in this utility model.

[0020] Figure 4 This is a schematic diagram of the water tank for an anti-interference flame detector for thermal power plants proposed in this utility model.

[0021] Legend:

[0022] 1. Mounting plate; 2. Protective shell; 3. Detector body; 4. Lens; 5. Turntable; 6. Control column; 7. Rotating rod; 8. Moving rod; 9. Scraper; 10. Limiting block; 11. Water tank; 12. Pump body; 13. Inlet pipe; 14. Circular water pipe; 15. Outlet pipe; 16. Motor; 17. Heat dissipation fins; 18. Support frame; 19. Fan; 20. Rotating shaft. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Reference Figure 1 and Figure 2 An embodiment of this utility model provides an anti-interference flame detector for a thermal power plant, comprising a mounting plate 1, a protective shell 2 fixedly connected to the inner wall of the mounting plate 1, a detector body 3 fixedly connected to the inner wall of the protective shell 2, a lens 4 fixedly connected to the rear end of the detector body 3, a rotating shaft 20 fixedly connected to the inner wall of the mounting plate 1, a turntable 5 fixedly connected to the rear end of the rotating shaft 20, a control column 6 fixedly connected to the eccentric rear end of the turntable 5, a rotating rod 7 rotatably connected to the outer wall of the control column 6, a moving rod 8 rotatably connected to the other end of the rotating rod 7, a left end of the moving rod 8 fixedly connected to the right end of a scraper 9, a limit block 10 fixedly connected to the rear end of the mounting plate 1, a sliding connection between the outer wall of the moving rod 8 and the inner wall of the limit block 10, a scraper 9 located at the rear end of the lens 4, a motor 16 fixedly connected to the front end of the mounting plate 1, and a drive end of the rotating shaft 20 fixedly connected to the front end of the motor 16.

[0025] Specifically, lens 4 is made of quartz glass, which allows ultraviolet, visible, and near-infrared light to pass through. It is a common material for the protective window of flame detectors. When a flame burns, it releases light radiation of specific wavelengths, including visible light, infrared, and ultraviolet light. The detector body 3 captures these characteristic light signals through corresponding sensors to determine whether a flame exists. The scraper 9 is made of perfluoroether rubber, which has a long-term temperature resistance of 300-320℃ and can operate stably in the detection area of ​​300-600℃.

[0026] Reference Figure 1 , Figure 3 and Figure 4A water tank 11 is fixedly connected to the front end of the mounting plate 1. Multiple heat dissipation fins 17 are fixedly connected to the inner wall of the right end of the water tank 11. A pump body 12 is fixedly connected to the front end of the water tank 11. A water inlet pipe 13 is fixedly connected to the front end of the pump body 12. An annular water pipe 14 is fixedly connected to the other end of the water inlet pipe 13. The annular water pipe 14 surrounds the outer wall of the detector body 3. A water outlet pipe 15 is fixedly connected to the other end of the annular water pipe 14. The other end of the water outlet pipe 15 is fixedly connected to the front end of the water tank 11. A support frame 18 is fixedly connected to the right end of the water tank 11. The heat dissipation fins 17 are located inside the support frame 18. A fan 19 is fixedly connected to the inner wall of the right end of the support frame 18.

[0027] Specifically, the protective shell 2 has heat insulation properties, the annular water pipe 14 is made of copper, which is a metal material with extremely high thermal conductivity. When the detector body 3 generates heat due to operation, the heat will be transferred through the outer wall of the detector body 3 to the tightly fitted copper annular water pipe 14. The heat dissipation fins 17 are made of high thermal conductivity material to ensure that the heat of the water tank 11 can be quickly transferred to the fins. The multi-fin structure efficiently transfers heat to the air by expanding the heat dissipation area and optimizing air circulation.

[0028] Working principle: During use, the mounting plate 1 is installed on the inner wall of the combustion chamber, allowing the detector body 3 to be installed on the combustion chamber, enabling it to detect the flame inside the combustion chamber. During use, the pump body 12 is activated, pumping water from the water tank 11 into the inlet pipe 13, and then water exits from the inlet pipe 13 into the annular water pipe 14. The annular water pipe 14 surrounds the outer wall of the detector body 3, allowing the cooling water in the annular water pipe 14 to carry away the heat from the detector body 3. The water in the annular water pipe 14 then returns to the water tank 11 through the outlet pipe 15, and the heat dissipation fins 17 can quickly dissipate the heat. The water in the tank 11 is cooled down, and at the same time the fan 19 is turned on. The fan 19 blows air onto the heat sink 17 to remove the heat from the heat sink 17. Dust will be generated in the combustion chamber. After long-term use, dust will accumulate on the lens 4. At this time, the motor 16 is turned on. The motor 16 drives the rotating shaft 20, which in turn drives the turntable 5 to rotate. This drives the control column 6 to rotate around the turntable 5, which in turn drives the rotating rod 7 to rotate. The rotating rod 7 drives the moving rod 8 to move back and forth, so that the scraper 9 moves back and forth on the lens 4 to scrape away the dust on the lens 4 and prevent the accumulation of dust on the lens 4 from shortening the detection distance of the infrared sensor.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A flame detector for thermal power plants that resists interference, characterized in that, The device includes a mounting plate (1), a protective shell (2) fixedly connected to the inner wall of the mounting plate (1), a detector body (3) fixedly connected to the inner wall of the protective shell (2), a lens (4) fixedly connected to the rear end of the detector body (3), a rotating shaft (20) fixedly connected to the inner wall of the mounting plate (1), the rotating shaft (20) being connected to a scraper (9) via a cleaning assembly, the scraper (9) being located at the rear end of the lens (4), a water tank (11) fixedly connected to the front end of the mounting plate (1), a plurality of heat dissipation fins (17) fixedly connected to the inner wall of the right end of the water tank (11), a pump body (12) fixedly connected to the front end of the water tank (11), and the pump body (12) being connected to the detector body (3) via a cooling assembly.

2. The anti-interference flame detector for thermal power plants according to claim 1, characterized in that: The cleaning assembly includes a turntable (5) fixedly connected to the rear end of the rotating shaft (20), a control column (6) fixedly connected to the eccentric rear end of the turntable (5), and a rotating rod (7) rotatably connected to the outer wall of the control column (6).

3. The anti-interference flame detector for thermal power plants according to claim 2, characterized in that: The other end of the rotating rod (7) is rotatably connected to a moving rod (8), and the left end of the moving rod (8) is fixedly connected to the right end of the scraper (9).

4. The anti-interference flame detector for thermal power plants according to claim 3, characterized in that: The mounting plate (1) is fixedly connected to a limiting block (10) at its rear end, and the outer wall of the moving rod (8) is slidably connected to the inner wall of the limiting block (10).

5. The anti-interference flame detector for thermal power plants according to claim 1, characterized in that: The cooling assembly includes a water inlet pipe (13) fixedly connected to the front end of the pump body (12), and an annular water pipe (14) fixedly connected to the other end of the water inlet pipe (13), which surrounds the outer wall of the detector body (3).

6. The anti-interference flame detector for thermal power plants according to claim 5, characterized in that: The other end of the annular water pipe (14) is fixedly connected to a water outlet pipe (15), and the other end of the water outlet pipe (15) is fixedly connected to the front end of the water tank (11).

7. The anti-interference flame detector for thermal power plants according to claim 1, characterized in that: The water tank (11) is fixedly connected to a support frame (18) at the right end, the heat dissipation fins (17) are located inside the support frame (18), and a fan (19) is fixedly connected to the inner wall of the right end of the support frame (18).

8. The anti-interference flame detector for thermal power plants according to claim 1, characterized in that: The front end of the mounting plate (1) is fixedly connected to a motor (16), and the front end of the rotating shaft (20) is fixedly connected to the drive end of the motor (16).

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