Online monitoring device based on hearth atmosphere field

Abstract

The utility model relates to the technical field of hearth atmosphere field monitoring, and discloses an on-line monitoring device based on a hearth atmosphere field, which comprises a device shell integrated display screen, a control button and a main control circuit board, and is matched with an upper surface moving assembly to realize the adjustment of the spatial position of a monitoring rod. The air compressor is arranged at the front end of the monitoring rod, the monitoring head is arranged at the rear end of the monitoring rod, the internal air channel communicates with the air outlet end of the air compressor and the air cavity, and the conical-surface annular plate structure is additionally arranged at the tail end. High-temperature-resistant bristles are evenly arranged on the inner wall of the annular plate, a sliding mechanism is formed through a connecting rod and a guide block, and automatic reset is achieved through a reset spring. During working, compressed air generated by an air compressor is conveyed to a monitoring head area through an air channel, surface smoke and coke are removed through the air flow scouring effect, the conical surface annular plate drives bristles to form a dynamic cleaning structure under air pressure driving, and an annular protective air curtain is constructed synchronously to reduce the influence of heat radiation. In a shutdown state, the conical surface ring plate automatically resets to form sealing, and high-temperature flue gas is prevented from flowing backwards.

Description

Technical Field

[0001] The utility model relates to the technical field of furnace atmosphere field monitoring, and particularly relates to an on-line monitoring device based on the furnace atmosphere field. Background Technique

[0002] The furnace atmosphere field refers to the comprehensive state of the gas composition, pressure, flow rate and temperature distribution inside the furnace. Its precise control is a key link in industrial heat treatment, material synthesis and energy utilization. The furnace atmosphere field adjusts the gas type and its proportion, pressure and flow rate to construct a specific environment to meet the process requirements. The furnace atmosphere field refers to the comprehensive state of the gas composition, pressure, flow rate and temperature distribution inside the furnace. Its precise control is a key link in industrial heat treatment, material synthesis and energy utilization. The furnace atmosphere field directly affects the quality and performance of products and the operation efficiency of equipment. The on-line monitoring device can monitor parameters such as gas composition, pressure, flow rate and temperature in the furnace in real time, providing data support for the precise control of the furnace atmosphere field.

[0003] For the traditional on-line monitoring device based on the furnace atmosphere field, the device is fixed outside the furnace body. The probe rod on the device drives the probe to extend into the furnace for on-line monitoring, and collects and analyzes the monitoring data. Since there is a large amount of dust in the furnace and it adheres to the surface of the probe, it will affect the measurement accuracy of the probe. To solve the above problems, for some on-line monitoring devices based on the furnace atmosphere field, multiple groups of air channels are opened in the rod body, and the air outlet ends of the air channels are aligned with the probe, so that the air compressor blows compressed air along the air channels to the probe for dust cleaning, thereby ensuring the measurement accuracy of the probe. However, in this way, due to ensuring the overall hardness of the probe rod, the number of opened air channels is limited, which not only limits the dust cleaning range, but also reduces the dust cleaning effect. Therefore, an on-line monitoring device based on the furnace atmosphere field is proposed. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides an on-line monitoring device based on the furnace atmosphere field to solve the technical problems of not only limited dust cleaning range but also reduced dust cleaning effect.

[0005] To achieve the above purpose, the utility model provides the following technical solutions: An on-line monitoring device based on the furnace atmosphere field, comprising:

[0006] A device housing, as well as a display screen and control buttons arranged on the front surface of the device housing. The inner cavity of the device housing is also equipped with a main control circuit board, and a moving component is installed on the upper surface of the device housing;

[0007] A monitoring rod, arranged on the upper surface of the device housing, and the monitoring rod is connected to the moving component, and an air compressor and a monitoring head are respectively installed at the front end and the rear end of the monitoring rod;

[0008] An air passage is arranged in the inner cavity of the monitoring rod. The two ends of the air passage are respectively communicated with an air chamber and the air outlet end of an air compressor. A conical ring plate is additionally provided at the air outlet end of the air passage. High-temperature resistant bristles are evenly installed on the inner wall of the conical ring plate. A connecting rod is additionally provided on the back of the conical ring plate. A guiding block and a return spring are respectively sleeved on the surface of the connecting rod. The guiding block is connected to the inner wall of the air chamber, and the conical ring plate is located at the rear end of the monitoring rod. The device is started through the control button on the front of the device housing. After receiving the instruction, the main control circuit board drives the moving component to work, driving the monitoring rod to move along a preset track to a specified monitoring position in the furnace. At the same time, the display screen real-time displays the operation state parameters of the device. The air compressor at the front end of the monitoring rod starts, compresses the ambient air, and transports it to the rear air chamber through the air passage in the inner cavity of the monitoring rod, forming a continuous and stable high-pressure air flow. After the high-pressure gas enters the air chamber, it generates a thrust, pushing the conical ring plate and the connecting rod to move along the guiding block. The high-temperature resistant bristles mechanically clean the surface of the monitoring head during the movement. At the same time, the conical structure of the conical ring plate guides the air flow to form an annular protective air curtain to wrap the monitoring head. The monitoring head continuously collects parameters such as the temperature and gas composition in the furnace under the protection of the air flow. The data is transmitted to the main control circuit board for processing through the internal circuit of the monitoring rod, and finally visually displayed through the display screen. When the monitoring operation is paused or the device is shut down, the return spring releases the elastic potential energy to push the conical ring plate to move in the reverse direction along the connecting rod. The guiding block ensures the accurate movement track. Finally, the conical ring plate is closely attached to the end face of the air chamber, forming a physical sealing structure. The main control circuit board consists of a central control module, a motor drive module, a position feedback module, a power management module, a pneumatic control module, a displacement detection module, a data acquisition module, a data processing module, a display drive module, and a communication interface module. The central control module is responsible for parsing the input instructions of the control button, coordinating the working timings of each module, and executing the monitoring rod position control algorithm, the start-stop logic of the air flow system, and the data acquisition process. The motor drive module includes an H-bridge drive circuit or a stepper motor drive chip, and controls the forward and reverse rotation and speed of the drive motor according to the MCU instruction, realizing the precise meshing transmission of the driving gear and the driven gear, and driving the monitoring rod to make a linear reciprocating motion along the guiding sleeve. The position feedback module integrates an encoder interface circuit or a Hall sensor, and real-time collects the relative position signal between the tooth connecting block on the surface of the monitoring rod and the guiding sleeve, forming a closed-loop control to ensure the positioning accuracy of the monitoring head. The power management module includes a DC-DC conversion circuit and a MOSFET switch array, provides a stable working voltage for components such as the air compressor, the drive motor, and the display screen, and controls the power on and off of the return spring drive circuit in the shutdown timing. The pneumatic control module is configured with a solenoid valve drive circuit and a pressure sensor interface, adjusts the output air pressure of the air compressor through a PWM signal, controls the air flow velocity in the air passage, and simultaneously monitors the pressure change in the air chamber to judge the action state of the conical ring plate.The displacement detection module uses a limit switch or a linear displacement sensor to detect the axial displacement of the conical ring plate connecting rod. When the monitoring rod extends, it triggers the cleaning action, and when it contracts, it verifies the sealing in-place signal of the return spring; the data acquisition module includes a multi-channel ADC converter and a signal conditioning circuit, which amplifies, filters, and digitizes analog signals such as temperature and gas concentration output by the monitoring head; the data processing module integrates a digital signal processor (DSP) or an enhanced MCU core, executes data filtering algorithms (such as Kalman filtering), temperature compensation calculations, and outlier rejection, and outputs a standard monitoring data packet that conforms to the Modbus protocol; the display driving module configures a dedicated LCD / OLED driving chip, converts the processed monitoring data into pixel signals recognizable by the display screen, and supports real-time curve plotting and status icon display functions; the communication interface module includes UART, SPI, and Ethernet physical layer circuits, realizes data interaction with the upper computer monitoring system, supports the OPC UA protocol for remote parameter configuration and historical data upload. The structures and uses of the above-mentioned various modules are all prior arts, so they will not be described in detail here.

[0009] Preferably, the moving component includes a driving gear and a driven gear, and the rotating end of the driving gear is coaxially connected to a driving motor. The moving component realizes power output through the meshing transmission of the driving gear and the driven gear. The output shaft of the driving motor is coaxially connected to the driving gear. When the motor operates, the driving gear drives the driven gear to rotate synchronously, forming a double-gear driving structure.

[0010] Preferably, the driving gear and the driven gear are rotatably connected to the upper surface of the device housing, and the driving motor is connected to the upper surface of the device housing through a motor seat. The driving gear and the driven gear are rotationally connected to the upper surface of the device housing through a bearing assembly, and the driving motor is fixed to the upper surface of the device housing through a dedicated motor seat to ensure the axial positioning accuracy of the gear transmission system.

[0011] Preferably, guide sleeves are installed at both the front end and the rear end of the upper surface of the device housing, and the monitoring rod is arranged at the center of the inner cavity of the guide sleeve. The guide sleeves arranged at the front end and the rear end of the upper surface of the device housing constitute a linear motion guide rail for the monitoring rod. The monitoring rod passes through the center of the inner cavity of the guide sleeve, and the radial offset of the monitoring rod is restricted by the guiding surface of the inner wall of the sleeve.

[0012] Preferably, a protective sleeve is connected to the surface of the monitoring rod, and tooth connecting blocks are installed on both sides of the protective sleeve. The protective sleeve sleeved on the surface of the monitoring rod forms a physical protection layer. The tooth connecting blocks arranged on both sides of the protective sleeve extend along the axial direction of the monitoring rod, and the outer surface of the tooth connecting block is processed with a tooth-shaped structure meshing with the gear.

[0013] Preferably, the tooth connecting block is in sliding fit with the inner wall of the guiding sleeve, and the tooth connecting block meshes with the corresponding driving gear and driven gear. A sliding fit relationship is formed between the tooth connecting block and the inner wall of the guiding sleeve. When the gear transmission system operates, the tooth profiles of the driving gear and the driven gear mesh with the tooth profile of the tooth connecting block, converting the rotational motion into the linear reciprocating motion of the monitoring rod.

[0014] In the on-line monitoring device based on the furnace atmosphere field, an air compressor arranged at the front end of the monitoring rod and a monitoring head at the rear end form an air flow circulation system through an air passage. The compressed air output by the air compressor is conveyed to the rear end of the monitoring rod through the air passage. By using the air flow scouring effect, the soot particles or coking substances attached to the surface of the monitoring head are effectively removed, avoiding the distortion of monitoring data. The high-temperature resistant bristles evenly distributed on the inner wall of the conical ring plate form a dynamic cleaning structure driven by compressed air. It can continuously clean the surface of the monitoring head during the monitoring process, improve the ash cleaning range and effect, and can also guide the air flow through the conical structure to form an annular protective gas curtain, reducing the direct thermal radiation effect of the high-temperature furnace gas on the monitoring head. The sliding fit structure between the connecting rod and the guiding block ensures that the conical ring plate reciprocates along a predetermined track. The elastic restoring force provided by the return spring makes the conical ring plate automatically reset to the sealed position in the non-working state, preventing the high-temperature flue gas in the furnace from flowing back into the inside of the monitoring rod, effectively protecting the air passage and related electrical components from high-temperature erosion. Through the composite protection mechanism of mechanical cleaning and air flow isolation, the device not only ensures the continuous working reliability of the monitoring head, but also extends the service life of the core components under harsh working conditions, significantly improving the accuracy and stability of the on-line monitoring of the furnace atmosphere field. Description of the Drawings

[0015] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0016] Figure 2 It is a schematic cross-sectional view of the moving component and the guiding sleeve of the present utility model;

[0017] Figure 3 It is a schematic cross-sectional view of the protective sleeve of the present utility model;

[0018] Figure 4 It is a partial cross-sectional view of the monitoring rod of the present utility model;

[0019] Figure 5 It is a schematic view of the right rear side of the partial cross-section of the monitoring rod of the present utility model;

[0020] Figure 6 It is a schematic diagram of the conical ring plate and its connection structure of the present utility model.

[0021] In the figure: 1, device housing; 2, display screen; 3, control button; 4, moving component; 5, driving gear; 6, driven gear; 7, driving motor; 8, guiding sleeve; 9, protective sleeve; 10, tooth connecting block; 11, monitoring rod; 12, air compressor; 13, monitoring head; 14, air passage; 15, air chamber; 16, conical ring plate; 17, high-temperature resistant bristles; 18, connecting rod; 19, guiding block; 20, return spring. Detailed implementation

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] The present invention provides a technical solution, an on-line monitoring device based on the furnace atmosphere field, including: Please refer to Figure 1 , Figure 4 , Figure 5 and Figure 6 , the device housing 1, and the display screen 2 and the control button 3 arranged on the front surface of the device housing 1, and a main control circuit board is also installed in the inner cavity of the device housing 1, and a moving component 4 is installed on the upper surface of the device housing 1;

[0024] The monitoring rod 11 is arranged on the upper surface of the device housing 1, and the monitoring rod 11 is connected to the moving component 4, and an air compressor 12 and a monitoring head 13 are respectively installed at the front end and the rear end of the monitoring rod 11;

[0025] An air passage 14 is provided inside the monitoring rod 11. Both ends of the air passage 14 are respectively connected to an air chamber 15 and the air outlet end of an air compressor 12. A conical ring plate 16 is added to the air outlet end of the air passage 14. High-temperature resistant bristles 17 are evenly installed on the inner wall of the conical ring plate 16. A connecting rod 18 is added to the back of the conical ring plate 16. A guide block 19 and a return spring 20 are respectively sleeved on the surface of the connecting rod 18. The guide block 19 is connected to the inner wall of the air chamber 15, and the conical ring plate 16 is located at the rear end of the monitoring rod 11. The device is started by the control button 3 on the front of the device housing 1. After receiving the instruction, the main control circuit board drives the moving component 4 to work, driving the monitoring rod 11 to move along a preset trajectory to a specified monitoring position in the furnace. At the same time, the display screen 2 real-time displays the operation state parameters of the device. The air compressor 12 at the front end of the monitoring rod 11 starts, compresses the ambient air, and transports it through the air passage 14 inside the monitoring rod 11 to the rear air chamber 15, forming a continuous and stable high-pressure air flow. After the high-pressure gas enters the air chamber 15, it generates a thrust, pushing the conical ring plate 16 and the connecting rod 18 to move along the guide block 19. The high-temperature resistant bristles 17 mechanically clean the surface of the monitoring head 13 during the movement. At the same time, the conical structure of the conical ring plate 16 guides the air flow to form an annular protective air curtain to wrap the monitoring head 13. The monitoring head 13 continuously collects parameters such as the temperature and gas composition in the furnace under the protection of the air flow. The data is transmitted to the main control circuit board for processing through the internal circuit of the monitoring rod 11, and finally visualized through the display screen 2. When the monitoring operation is paused or the device is shut down, the return spring 20 releases elastic potential energy to push the conical ring plate 16 to move in the reverse direction along the connecting rod 18. The guide block 19 ensures the accuracy of the movement trajectory. Finally, the conical ring plate 16 is closely attached to the end face of the air chamber 15, forming a physical sealing structure.

[0026] Please refer to Figure 2, the moving component 4 includes a driving gear 5 and a driven gear 6, and the rotating end of the driving gear 5 is coaxially connected to a driving motor 7. The moving component 4 realizes power output through the meshing transmission of the driving gear 5 and the driven gear 6. The output shaft of the driving motor 7 is coaxially connected to the driving gear 5. When the motor operates, the driving gear 5 drives the driven gear 6 to rotate synchronously, forming a double-gear driving structure. Through the synchronous meshing of the driving gear 5 and the driven gear 6, the double-gear driving structure effectively disperses the transmission load. Compared with the single-gear driving scheme, it can improve the output stability and reduce the gear wear rate. The driving gear 5 and the driven gear 6 are rotationally connected to the upper surface of the device housing 1, and the driving motor 7 is connected to the upper surface of the device housing 1 through a motor base. The driving gear 5 and the driven gear 6 are rotationally connected to the upper surface of the device housing 1 through a bearing assembly, and the driving motor 7 is fixed to the upper surface of the device housing 1 through a special motor base to ensure the axial positioning accuracy of the gear transmission system. The rigid connection design of the gear assembly and the device housing 1, combined with the special mounting seat of the driving motor 7, controls the axial runout of the transmission system and significantly improves the position control accuracy of the monitoring rod 11.

[0027] Please refer to Figure 3 , guide sleeves 8 are installed at both the front end and the rear end of the upper surface of the device housing 1, and the monitoring rod 11 is arranged at the center of the inner cavity of the guide sleeve 8. The guide sleeves 8 arranged at the front end and the rear end of the upper surface of the device housing 1 constitute the linear motion guide rails of the monitoring rod 11. The monitoring rod 11 passes through the center of the inner cavity of the guide sleeve 8, and the radial offset of the monitoring rod 11 is restricted by the guiding surface of the inner wall of the sleeve. A protective sleeve 9 is connected to the surface of the monitoring rod 11, and tooth-connected blocks 10 are installed on both sides of the protective sleeve 9. The protective sleeve 9 sleeved on the surface of the monitoring rod 11 forms a physical protection layer. The tooth-connected blocks 10 arranged on both sides of the protective sleeve 9 extend along the axial direction of the monitoring rod 11. The outer surface of the tooth-connected block 10 is processed with a tooth-shaped structure meshing with the gear. The combined design of the protective sleeve 9 and the tooth-connected block 10 forms a protection for the monitoring rod 11 while realizing the motion transmission function, effectively blocking the erosion of the molten particulate matter splashing in the furnace on the monitoring rod 11.

[0028] The tooth-connected block 10 is slidably fitted to the inner wall of the guide sleeve 8, and the tooth-connected block 10 meshes with the corresponding driving gear 5 and driven gear 6. The tooth-connected block 10 forms a sliding fit relationship with the inner wall of the guide sleeve 8. When the gear transmission system operates, the tooth shapes of the driving gear 5 and the driven gear 6 mesh with the tooth shape of the tooth-connected block 10, converting the rotational motion into the linear reciprocating motion of the monitoring rod 11.

[0029] In this solution: The operator inputs a start command through the control button 3 on the front of the device housing 1. After receiving the signal, the main control circuit board initializes each functional module, and the display screen 2 synchronously displays the system self-check status and initial parameters;

[0030] The main control circuit board drives the drive motor 7 of the moving component 4 to operate, driving the synchronous rotation of the driving gear 5 and the driven gear 6. The gear set transmits torque to the tooth connecting blocks 10 on both sides of the surface protection sleeve 9 of the monitoring rod 11 through meshing transmission, driving the monitoring rod 11 to move linearly along the inner wall of the guiding sleeve 8. During the movement, the guiding surface of the guiding sleeve 8 restricts the radial offset of the monitoring rod 11 to ensure that the monitoring head 13 accurately reaches the preset monitoring point in the furnace;

[0031] After the monitoring rod 11 arrives in place, the main control circuit board starts the front-end air compressor 12. Compressed air is transported through the air passage 14 in the inner cavity of the monitoring rod 11 to the rear air chamber 15, forming a high-pressure air source in the chamber. The air flow pushes the conical ring plate 16 and the connecting rod 18 to move axially along the guiding block 19, compressing the return spring 20 and driving the high-temperature resistant bristles 17 to contact the surface of the monitoring head 13;

[0032] During the movement of the conical ring plate 16, the high-temperature resistant bristles 17 mechanically clean the surface of the monitoring head 13. At the same time, the conical structure of the conical ring plate 16 guides the air flow to the periphery of the monitoring head 13, forming an annular protective air curtain to block the direct contact of the high-temperature furnace gas with the monitoring head 13 and reduce the influence of thermal radiation;

[0033] The monitoring head 13 continuously collects parameters such as the temperature, oxygen concentration, and carbon monoxide content in the furnace under the protection of the air flow. The original signal is transmitted to the main control circuit board through the internal circuit of the monitoring rod 11. After the circuit board filters, amplifies, and digitally processes the signal, it sends the structured data to the display screen 2 for real-time visual display through a wired or wireless communication protocol;

[0034] When the monitoring task is paused or the device receives a shutdown command, the main control circuit board cuts off the power supply of the air compressor 12. The return spring 20 releases its elastic potential energy to push the conical ring plate 16 to move in the reverse direction along the connecting rod 18. The guiding block 19 ensures an accurate movement trajectory. Finally, the end face of the conical ring plate 16 is tightly attached to the air outlet of the air chamber 15, forming a physical sealing structure to prevent the backflow of high-temperature flue gas in the furnace;

[0035] The main control circuit board synchronously controls the drive motor 7 to reverse, driving the monitoring rod 11 to retract to the initial position on the upper surface of the device housing 1 through the gear transmission system. The display screen 2 shows the system shutdown state, and the device enters the low-power standby mode.

[0036] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variation thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device.

[0037] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An on-line monitoring device based on the furnace atmosphere field, characterized in that Comprising: A device housing (1), a display screen (2) and control buttons (3) provided on the front surface of the device housing (1), and a main control circuit board is further installed in the inner cavity of the device housing (1), and a moving component (4) is installed on the upper surface of the device housing (1); A monitoring rod (11), provided on the upper surface of the device housing (1), and the monitoring rod (11) is connected to the moving component (4), and an air compressor (12) and a monitoring head (13) are respectively installed at the front end and the rear end of the monitoring rod (11); An air passage (14), provided in the inner cavity of the monitoring rod (11), and both ends of the air passage (14) are respectively communicated with an air chamber (15) and the air outlet end of the air compressor (12), and a conical ring plate (16) is additionally provided at the air outlet end of the air passage (14), and high-temperature resistant bristles (17) are uniformly installed on the inner wall of the conical ring plate (16), and a connecting rod (18) is additionally provided on the back surface of the conical ring plate (16), and a guiding block (19) and a return spring (20) are respectively sleeved on the surface of the connecting rod (18), the guiding block (19) is connected to the inner wall of the air chamber (15), and the conical ring plate (16) is located at the rear end of the monitoring rod (11).

2. The on-line monitoring device based on the furnace atmosphere field according to claim 1, characterized in that: The moving component (4) includes a driving gear (5) and a driven gear (6), and the rotating end of the driving gear (5) is coaxially connected to a driving motor (7).

3. The on-line monitoring device based on the furnace atmosphere field according to claim 2, characterized in that: The driving gear (5) and the driven gear (6) are rotatably connected to the upper surface of the device housing (1), and the driving motor (7) is connected to the upper surface of the device housing (1) through a motor base.

4. The on-line monitoring device based on the furnace atmosphere field according to claim 2, wherein: Guide sleeves (8) are installed at both the front end and the rear end of the upper surface of the device housing (1), and the monitoring rod (11) is provided at the center of the inner cavity of the guide sleeve (8).

5. The on-line monitoring device based on the furnace atmosphere field according to claim 4, characterized in that: A protective sleeve (9) is connected to the surface of the monitoring rod (11), and tooth connecting blocks (10) are installed on both sides of the protective sleeve (9).

6. The on-line monitoring device based on the furnace atmosphere field according to claim 5, characterized in that: The tooth connecting blocks (10) are slidably fitted to the inner wall of the guide sleeve (8), and the tooth connecting blocks (10) are engaged with the corresponding driving gear (5) and driven gear (6).

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