An endoscopic flame television monitoring device
By installing temperature sensing components and a purge air channel on the outer wall of the high-temperature periscope lens, and combining them with a PID temperature controller, intelligent cooling control of the endoscopic flame television monitoring device was achieved, solving the problems of large cooling air consumption and high operating costs, and achieving the effect of energy saving and consumption reduction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TIELING TIEGUANG INSTR LLC
- Filing Date
- 2025-08-06
- Publication Date
- 2026-06-05
AI Technical Summary
Existing endoscopic flame television monitoring devices consume a large amount of cooling air, resulting in high operating costs and failing to meet the full operational requirements of the equipment.
A temperature sensing component is installed on the outer wall of the high-temperature periscope lens. Combined with a PID temperature controller and a purge air channel, intelligent cooling control of the lens is achieved, and energy saving and consumption reduction are achieved by adjusting the purge air volume.
It achieves effective lens cooling, prevents contamination and burn-out, reduces operating costs, and achieves energy conservation and emission reduction.
Smart Images
Figure CN224329526U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of monitoring device technology, and in particular relates to an endoscopic flame television monitoring device. Background Technology
[0002] An endoscopic flame television monitoring device is a device inserted into the furnace body from the upper part of the furnace wall to monitor the combustion status of the burner and the operation of the furnace tubes. After imaging through a high-temperature endoscopic lens, the image is converted into a video signal by a camera and transmitted to the central control room via a video cable. The monitor then displays the image on a screen, reflecting the complete combustion conditions on the grate. Its function is to replace manual inspection, providing operators with reliable combustion images and flameout alarms 24 hours a day, ensuring the safe operation of the heating furnace. Existing endoscopic flame television monitoring devices can be found in patent application number 201020213544.3, entitled "Endoscopic Furnace Flame Television Monitoring Device for Biomass Power Generation".
[0003] Currently, user feedback indicates that the endoscopic flame television device consumes a large amount of cooling air, resulting in high operating costs. Furthermore, with a large number of units installed, the on-site equipment (which is user-provided and primarily supplies power to other pneumatic equipment) cannot meet all the operational needs of the device (the endoscopic flame television device's purge air supply). Utility Model Content
[0004] This invention addresses the aforementioned problems by providing an endoscopic flame television monitoring device that offers excellent purging performance and energy efficiency.
[0005] To achieve the above objectives, this utility model adopts the following technical solution: The utility model includes a protective tube that passes through the wall of the heating furnace. A protective cover is connected to the front end of the protective tube. A high-temperature periscope lens is installed inside the protective tube, and a digital camera is installed at the rear end of the protective tube. The high-temperature periscope lens is driven by a horizontal drive device. A purge air channel is provided between the outer wall of the high-temperature periscope lens and the inner walls of the protective tube and the protective cover. A purge air inlet is provided on the wall of the protective tube, and a purge air outlet is provided on the wall of the protective cover. A temperature sensing component is provided on the outer wall of the high-temperature periscope lens. The detection signal output port of the temperature sensing component is connected to the detection signal input port of a first controller. The control signal output port of the first controller is connected to the control signal input port of a regulating valve that controls the purge air. The camera portion of the high-temperature periscope lens is positioned corresponding to the purge air outlet position.
[0006] As a preferred embodiment, the temperature sensing component of this invention uses a TP100 resistance thermometer, and a resistance thermometer wire lead-out is provided on the protective tube wall.
[0007] As another preferred embodiment, the high-temperature periscope lens of this invention is provided with a pressure plate on its outer wall, one end of which is connected to the outer wall of the high-temperature periscope lens, and one end of which has an arc-shaped pressure groove, and the temperature sensing component is disposed in the arc-shaped pressure groove.
[0008] As another preferred embodiment, the protective tube and protective cover of this utility model are made of 304 steel.
[0009] As another preferred embodiment, the front end of the protective tube is bolted to the rear end of the protective cover.
[0010] As another preferred option, the first controller of this utility model adopts a PID temperature controller.
[0011] As another preferred embodiment, the regulating valve of this utility model is provided with a sweeping bypass, and a throttling orifice plate is provided at the sweeping bypass.
[0012] As another preferred embodiment, a pressure gauge is provided on the regulating valve pipeline of the present invention. The detection signal output port of the pressure gauge and the detection signal output port of the first controller are connected to the detection signal input port of the second controller. The detection signal output port of the second controller is connected to the control signal input port of the horizontal drive device.
[0013] As another preferred embodiment, the horizontal drive device of this invention uses a cylinder.
[0014] Secondly, the cylinder described in this utility model is a rodless cylinder, which is mounted on a bracket. A mirror tube holder is provided on the slide of the rodless cylinder. The bracket is connected to the precast tube through a mounting plate. The precast tube is mounted on the furnace body. The mirror tube holder is connected to the protective tube.
[0015] In addition, the control port of the cylinder described in this utility model is connected to the air supply pipeline in sequence through a one-way regulating valve, a two-position five-way solenoid valve, an air tank, and a one-way valve.
[0016] The beneficial effects of this utility model.
[0017] The protective tube and protective cover of this utility model are wrapped around the outside of the high-temperature periscope lens, and the air flowing in the blow-through channel carries away the heat from the surface of the protective tube.
[0018] This invention adds a temperature sensing component to the outer wall of a high-temperature periscope lens to monitor the lens surface temperature in real time. When the lens surface temperature exceeds a predetermined value, the first controller controls the opening of the regulating valve in the purge air path to increase the airflow for cooling the lens. Conversely, when the heating furnace reduces its load, as the furnace temperature decreases, the first controller controls the opening of the regulating valve in the purge air path to decrease until the regulating valve is completely closed. This achieves intelligent control of the cooling airflow, thereby achieving energy saving, emission reduction, and lower operating costs.
[0019] The purge air of this utility model has two functions when the device is working. First, it protects the cleanliness of the lens by forming a sealed high-pressure air chamber at the front end of the lens, isolating the furnace gas from contact with the lens and preventing tar, fly ash and other impurities in the furnace from adhering to the lens and causing contamination. Second, it cools the lens and the outer protective tube, enabling it to work normally in a high-temperature environment of 1600℃ and preventing the lens assembly protruding into the furnace from being burned by high temperature. Attached Figure Description
[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The scope of protection of the present invention is not limited to the following description.
[0021] Figure 1 yes Figure 2 AA view.
[0022] Figure 2 This is a schematic diagram of the structure of this utility model.
[0023] Figure 3 This is a structural block diagram of the present invention.
[0024] Figure 4 This is a schematic diagram of the air control mechanism of this utility model.
[0025] Figure 5 This is a schematic diagram of the furnace flame television structure with a TP100 thermal resistor installed.
[0026] Figure 6 This is a schematic diagram of the temperature sensing component of this utility model.
[0027] Figure 7 This is a schematic diagram of the cylinder connection structure of this utility model.
[0028] In the diagram, 1 is the temperature sensing component, 2 is the furnace body, 3 is the protective tube, 4 is the pressure plate, 5 is the high-temperature periscope lens, 6 is the protective cover, 7 is the purge air outlet, 8 is the rotating mirror assembly, 9 is the purge air channel, 10 is the purge air inlet, 11 is the RTD wire outlet, 12 is the digital camera, 13 is the digital camera protective cover, 14 is the digital camera protective cover air inlet, 15 is the prefabricated tube, 16 is the mounting plate, 17 is the bracket, 18 is the lens tube holder, 19 is the slide, 20 is the cylinder, 21 is the cylinder's front air inlet, and 22 is the cylinder's rear air inlet. Detailed Implementation
[0029] As shown in the figure, this utility model includes a protective tube 3 that passes through the wall of the heating furnace. A protective cover 6 is connected to the rear end of the protective tube 3. A high-temperature periscope lens 5 is installed inside the protective tube 3, and a digital camera 12 is installed at the rear end of the protective tube 3. The high-temperature periscope lens 5 and the digital camera 12 are driven by a horizontal drive device. A purge air channel 9 is provided between the outer wall of the high-temperature periscope lens 5 and the inner walls of the protective tube 3 and the protective cover 6. A purge air inlet 10 is provided on the wall of the protective tube 3, and a purge air outlet 7 is provided on the wall of the protective cover 6. A temperature sensing component 1 is provided on the outer wall of the high-temperature periscope lens 5. The detection signal output port of the temperature sensing component 1 is connected to the detection signal input port of the first controller. The control signal output port of the first controller is connected to the control signal input port of the regulating valve that controls the purge air. The camera part of the high-temperature periscope lens 5 is positioned corresponding to the position of the purge air outlet 7.
[0030] The high-temperature periscope lens 5 and the digital camera 12 are two parts of the same product (which can be an FTV-AI furnace flame television). The high-temperature periscope lens 5 is inserted into the high-temperature furnace to capture images, which are then transmitted to the digital camera 12 outside the furnace via a rotating mirror assembly 8 (the rotating mirror assembly 8 and the high-temperature periscope lens 5 are an integral structure, transmitting the optical images captured by the lens to a distance, outside the high-temperature area, i.e., outside the furnace. The rotating mirror assembly 8 is also a component of the FTV-AI furnace flame television). The digital camera 12 is responsible for converting the optical images captured by the high-temperature periscope lens 5 into digital signals for convenient long-distance transmission.
[0031] The temperature sensing component 1 is a TP100 resistance thermometer, and the protective tube 3 has a resistance thermometer wire lead-out port 11 on its wall.
[0032] A pressure plate 4 is provided on the outer wall of the high-temperature periscope lens 5. One end of the pressure plate 4 is connected to the outer wall of the high-temperature periscope lens 5, and the other end of the pressure plate 4 has an arc-shaped pressure groove. The temperature sensing component 1 is disposed in the arc-shaped pressure groove. The pressure plate 4 can be welded to the outer wall of the high-temperature periscope lens 5. The TP100 thermal resistor is directly and tightly attached to the high-temperature periscope lens 5, which can directly reflect the real-time temperature of the high-temperature periscope lens 5; at the same time, this press-fitting method also facilitates the subsequent replacement of spare parts.
[0033] The TP100 thermal resistor is mounted on the outer surface of the lens by welding (the pressure plate 4 is welded to the lens, and the pressure plate 4 and the thermal resistor are pressed and fixed by the elasticity of the pressure plate 4 itself).
[0034] The protective tube 3 and the protective cover 6 are made of 304 steel.
[0035] The front end of the protective tube 3 is bolted to the rear end of the protective cover 6.
[0036] The first controller uses a PID temperature controller. The PID temperature controller can output alarm information to the terminal unit. When the temperature reaches the alarm value, it outputs an alarm message.
[0037] A purging bypass is provided beside the regulating valve, and a throttling orifice plate is installed at the purging bypass. The minimum flow rate of compressed air is limited by the diameter difference between the orifice plate and the ventilation duct, ensuring the minimum purging air flow rate protects the lens from contamination during operation inside the furnace. This basic airflow cannot be stopped as long as the device is operating. After the device stops operating, the main valve of the air control mechanism can be manually closed to completely shut off the air source.
[0038] The horizontal drive device uses a cylinder.
[0039] The cylinder is a rodless cylinder, which is mounted on the bracket 17. A lens tube holder 18 is installed on the slide 19 of the rodless cylinder. The bracket 17 is connected to the prefabricated tube 15 through the mounting plate 16. The prefabricated tube 15 is mounted on the furnace body 2. The lens tube holder 18 is connected to the protective tube 3. The protective tube 3 is assembled with the digital camera protective cover 13 as a whole.
[0040] The control port of the cylinder is connected to the air supply pipeline in sequence through a one-way regulating valve, a two-position five-way solenoid valve, an air tank, and a one-way valve.
[0041] A pressure gauge is installed on the regulating valve pipeline. The detection signal output port of the pressure gauge and the detection signal output port of the first controller are connected to the detection signal input port of the second controller. The detection signal output port of the second controller is connected to the control signal input port of the horizontal drive device. The pressure gauge detects the purge air pressure and sends the air pressure detection information to the second controller. The first controller detects the ambient temperature of the camera through the temperature sensing component 1 and sends the temperature detection information to the second controller. When the purge air pressure is less than 0.05MPa (i.e., the purge air pressure is too low) or the ambient temperature of the camera exceeds the set value, the second controller controls the horizontal drive device to drive the lens out of the working position to protect the lens from being burned or contaminated.
[0042] Figure 3The terminal display system may include a server (which can act as a second controller), a monitor, a hard disk recorder, etc., and its main uses are as follows: It restores the image of combustion inside the furnace to the monitor screen, allowing operators in the control room to intuitively see the real image inside the furnace. It implements a flameout alarm function for each burner. It records the combustion process of the furnace, automatically setting recording tags for the ten minutes before and five minutes after the flameout alarm point for easy retrieval.
[0043] The working process of this utility model will be described below with reference to the accompanying drawings.
[0044] System protection wind:
[0045] When putting the system into operation, first open the main valve, then slowly open the protective air valve connected to the digital camera protective housing 13. Note that the air pressure should be adjusted to 0.2–0.3 MPa to ensure optimal cooling. When the ambient temperature is below 40℃, this air supply can be shut off (i.e., the protective air valve can be closed). The protective air valve controls the airflow input to the digital camera protective housing 13. Specifically, the protective air valve is connected via a pipe to the air inlet 14 of the digital camera protective housing for the FTV-AI furnace flame television system, thus cooling the digital camera 12.
[0046] After the main valve is opened, the lens purging air path automatically provides the minimum airflow required for lens purging due to the purging bypass. As the furnace temperature rises, the TP100 thermal resistor monitors the lens surface temperature in real time. When the lens surface temperature exceeds the set value, a 4-20mA signal is output through the intelligent PID temperature controller.
[0047] The opening of the electrically adjustable valve in the main airflow path of the lens purge air increases the airflow to cool the lens. If the lens surface temperature continues to rise and the output current of the thermal resistor continues to increase, the opening of the purge air valve will be further increased to increase the purge airflow (i.e., the temperature transmitter output of 4-20mA corresponds to a valve opening of 0-100%), thus achieving the purpose of lens cooling. Conversely, when the heating furnace reduces its load, as the furnace temperature decreases, the output current of the intelligent PID temperature controller decreases, and the opening of the purge air valve also decreases until the valve is completely closed. This achieves intelligent control of the cooling airflow of this device, thereby achieving energy saving, emission reduction, and lower operating costs.
[0048] The purge air has two functions when the device is working. First, it protects the cleanliness of the lens by forming a sealed high-pressure air chamber at the front of the lens, isolating the furnace gas from contact with the lens and preventing tar, fly ash and other impurities in the furnace from adhering to the lens and causing contamination. Second, it cools the lens and the outer protective tube 3 so that it can work normally in a high-temperature environment of 1600℃ and prevents the lens assembly that has entered the furnace from being burned by high temperature.
[0049] Forward and backward control:
[0050] Compressed air controlled by the cylinder passes through a one-way valve and an air tank before entering a 2-position 5-way solenoid valve. The air tank ensures the high-temperature lens can smoothly exit the furnace when the compressed air supply is interrupted. The one-way valve is used in conjunction with the air tank to prevent backflow of gas entering it. During normal operation, the purge air pressure must be ≥0.3MPa. If the purge air pressure is less than 0.05MPa (i.e., too low) or the camera's ambient temperature exceeds the set value, the cylinder will drive the lens out of its working position to protect it from burns or contamination.
[0051] Cylinder entry control
[0052] When the enter button on the control cabinet is pressed, the 2-position 5-way solenoid valve is energized, connecting the cylinder's insertion end pipeline to the air tank. At this time, compressed air enters the cylinder's rear end interface through the air tank, the 2-position 5-way solenoid valve, and the normally open end of the one-way regulating valve, pushing the cylinder forward. Simultaneously, the exhaust flow rate of the cylinder's front end pipeline interface is adjusted by the one-way regulating valve and then discharged through the 2-position 5-way solenoid valve.
[0053] Cylinder Exit Control
[0054] When the exit button on the control cabinet is pressed, the 2-position 5-way solenoid valve is de-energized, and the cylinder's front-end pipeline is connected to the air tank via the normally open end of the one-way regulating valve, pushing the cylinder backward. Simultaneously, the exhaust flow from the cylinder's rear-end interface is adjusted by the one-way regulating valve and then discharged via the 2-position 5-way solenoid valve. The one-way regulating valve control is completed at the outlet end, making the cylinder operation more stable.
[0055] It is understood that the above specific description of this utility model is only used to illustrate this utility model and is not limited to the technical solutions described in the embodiments of this utility model. Those skilled in the art should understand that modifications or equivalent substitutions can still be made to this utility model to achieve the same technical effect; as long as the use needs are met, they are all within the protection scope of this utility model.
Claims
1. An endoscopic flame television monitoring device, comprising a protective tube passing through the wall of a heating furnace, a protective cover connected to the front end of the protective tube, a high-temperature periscope lens disposed inside the protective tube, and a digital camera disposed at the rear end of the protective tube, characterized in that... The high-temperature periscope lens is driven by a horizontal drive device. A purge air channel is provided between the outer wall of the high-temperature periscope lens and the inner wall of the protective tube and the protective cover. A purge air inlet is provided on the wall of the protective tube, and a purge air outlet is provided on the wall of the protective cover. A temperature sensing component is provided on the outer wall of the high-temperature periscope lens. The detection signal output port of the temperature sensing component is connected to the detection signal input port of the first controller. The control signal output port of the first controller is connected to the control signal input port of the regulating valve that controls the purge air. The camera part of the high-temperature periscope lens is positioned corresponding to the position of the purge air outlet.
2. The endoscopic flame television monitoring device according to claim 1, characterized in that... The temperature sensing component uses a TP100 resistance thermometer, and the protective tube wall is provided with a resistance thermometer wire lead-out outlet.
3. The endoscopic flame television monitoring device according to claim 1, characterized in that... A pressure plate is provided on the outer wall of the high-temperature periscope lens. One end of the pressure plate is connected to the outer wall of the high-temperature periscope lens, and one end of the pressure plate has an arc-shaped pressure groove. The temperature sensing component is set in the arc-shaped pressure groove.
4. The endoscopic flame television monitoring device according to claim 1, characterized in that... The front end of the protective tube is bolted to the rear end of the protective cover.
5. The endoscopic flame television monitoring device according to claim 1, characterized in that... The first controller uses a PID temperature controller.
6. The endoscopic flame television monitoring device according to claim 1, characterized in that... A bypass is provided beside the regulating valve, and a throttling orifice plate is provided at the bypass.
7. The endoscopic flame television monitoring device according to claim 1, characterized in that... A pressure gauge is installed on the regulating valve pipeline. The detection signal output port of the pressure gauge and the detection signal output port of the first controller are connected to the detection signal input port of the second controller. The detection signal output port of the second controller is connected to the control signal input port of the horizontal drive device.
8. The endoscopic flame television monitoring device according to claim 1, characterized in that... The horizontal drive device uses a cylinder.
9. The endoscopic flame television monitoring device according to claim 8, characterized in that... The cylinder is a rodless cylinder, which is mounted on a bracket. A mirror tube holder is installed on the slide of the rodless cylinder. The bracket is connected to the precast tube through a mounting plate. The precast tube is mounted on the furnace body. The mirror tube holder is connected to the protective tube.
10. An endoscopic flame television monitoring device according to claim 8, characterized in that... The control port of the cylinder is connected to the air supply pipeline in sequence through a one-way regulating valve, a two-position five-way solenoid valve, an air tank, and a one-way valve.