A cleaning device for a high temperature monitoring system

Abstract

The embodiment of the present disclosure provides a cleaning device for a high-temperature monitoring system, which comprises a propelling mechanism, a mechanical cleaning assembly, a mounting flange and a controller; one side of the mounting flange is sealingly connected to an outer wall of an industrial pipeline or a protective cover of a high-temperature monitoring device, a cleaning channel is formed in the industrial pipeline or the protective cover and is in communication with the central through hole; the propelling mechanism is fixed to the other side of the mounting flange, and the propelling mechanism comprises a propelling driving unit, a fixed guide block, a sliding sliding block and a guide limiting block; the mechanical cleaning assembly comprises a cleaning rod and a cleaning head, and the cleaning head is installed at the front end of the cleaning rod; the controller is electrically connected with the propelling driving unit and is used for controlling the propelling driving unit to work. The cleaning device for the high-temperature monitoring system can clean the pipeline online through the cleaning channel without affecting the operation of the high-temperature monitoring system.

Description

Technical Field

[0001] The embodiments disclosed herein belong to the field of channel cleaning technology, specifically relating to a cleaning device for a high-temperature monitoring system. Background Technology

[0002] In industrial production processes such as metallurgy, power generation, and chemicals, temperature monitoring in high-temperature environments is a crucial step in ensuring production safety and optimizing processes. Currently, non-contact infrared thermometry is widely used for online monitoring. Its advantage lies in not requiring direct contact with the measured medium and its adaptability to extremely high-temperature environments. Existing industrial high-temperature monitoring systems typically employ an endoscopic structure: a high-temperature resistant infrared lens is mounted in a metal protective enclosure, extending into the pipe through an opening in the furnace wall. The sensor remains outside the furnace, and compressed air cools the enclosure while simultaneously blowing away dust from the lens tip.

[0003] However, in actual production processes, high-temperature pipes contain large amounts of dust, fly ash, or volatile substances, which accumulate on the inner walls of the pipes, forming a layer of ash. This ash buildup can cause the following serious problems: 1. Obstruction of the temperature measurement optical path: Dust accumulation on the inner wall of the pipe can obstruct or scatter infrared radiation signals, resulting in a decrease in temperature measurement accuracy and a deviation of the reading from the true value; 2. Changes in thermal radiation characteristics: The accumulated dust layer forms an insulation layer, which changes the emissivity of the inner wall of the pipe and affects the accuracy of non-contact temperature measurement; 3. Difficult to maintain: Traditional dust removal methods require manual cleaning after the machine is shut down, which affects the continuity of production and poses a high risk of operation in high-temperature environments; 4. Limitations of existing cleaning solutions: Existing technologies are mainly designed for equipment such as heat exchangers and filter bags, and lack dedicated automatic cleaning solutions for observation channels of high-temperature monitoring systems. Summary of the Invention

[0004] The embodiments disclosed herein aim to at least solve one of the technical problems existing in the prior art, and provide a cleaning device for a high-temperature monitoring system.

[0005] Embodiments of this disclosure provide a cleaning device for a high-temperature monitoring system, the cleaning device including a propulsion mechanism, a mechanical cleaning assembly, a mounting flange, and a controller; The mounting flange is a disc-shaped connector with a central through hole, one side of which is sealed to the outer wall of an industrial pipeline or the protective cover of a high-temperature monitoring device. The industrial pipeline or the protective cover has a cleaning channel that communicates with the central through hole. The propulsion mechanism is fixed to the other side of the mounting flange, and the propulsion mechanism includes: A propulsion drive unit, the fixed end of which is connected to the base of the propulsion mechanism; A fixed guide block is fixed to the base of the propulsion mechanism; A sliding block is slidably mounted on the fixed guide block and is connected to the power output end of the propulsion drive unit. The propulsion drive unit drives the sliding block to reciprocate linearly along the guide direction of the fixed guide block. A guide limit block, which is fixed between the fixed guide block and the mounting flange, is used to limit the stroke of the sliding slider; The mechanical cleaning assembly includes a cleaning rod and a cleaning head; the cleaning rod passes through and is fixed to the sliding block, and the front end of the cleaning rod passes through the central through hole of the mounting flange and extends into the cleaning channel; and the cleaning head is mounted on the front end of the cleaning rod. The controller is electrically connected to the propulsion drive unit and is used to control the operation of the propulsion drive unit.

[0006] Optionally, the propulsion drive unit is an electric push rod or a pneumatic actuator.

[0007] Optionally, the fixed guide block is provided with a guide rod, and the sliding slider is provided with a sliding sleeve that matches the guide rod, so that the sliding slider slides along the fixed guide block in a directional manner.

[0008] Optionally, a friction-reducing layer or a linear bearing is provided on the contact surface between the fixed guide block and the sliding slider to reduce friction.

[0009] Optionally, the controller is configured to include at least one of a timed trigger mode, a differential trigger mode, and a manual control mode; wherein, The timed trigger mode controls the propulsion drive unit to work according to a preset time period; the difference trigger mode controls the propulsion drive unit to work when the deviation between the measured temperature and the preset reference temperature exceeds a threshold; the manual control mode allows manual operation to control the propulsion drive unit to work.

[0010] Optionally, the controller is also communicatively connected to the control unit of the high-temperature monitoring system, and the controller is further configured to send a signal to the high-temperature monitoring system when the propulsion drive unit is working, so that the high-temperature monitoring system suspends temperature data acquisition or marks the acquired data.

[0011] Optionally, the controller monitors the propulsion drive unit based on its operating current or feedback position signal, and when an abnormality is detected, controls the propulsion drive unit to reverse and retract the mechanical cleaning assembly.

[0012] The cleaning device for a high-temperature monitoring system disclosed herein can perform online cleaning of the inside of pipes through a cleaning channel without affecting the operation of the high-temperature monitoring system. This solves the technical problem in the prior art where dust accumulation on the inner wall of pipes leads to decreased temperature measurement accuracy and requires shutdown for maintenance. Attached Figure Description

[0013] Figure 1 This is a cross-sectional schematic diagram of a cleaning device for a high-temperature monitoring system according to an embodiment of the present disclosure. Detailed Implementation

[0014] To enable those skilled in the art to better understand the technical solutions of this disclosure, the disclosure will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0015] This invention employs an automatic propulsion + mechanical cleaning method. A propulsion mechanism delivers the mechanical cleaning component to a designated location inside the pipeline, removing accumulated ash mechanically. The cleaning device is installed in parallel with a high-temperature monitoring system, enabling periodic or continuous automatic operation without interrupting temperature monitoring.

[0016] like Figure 1 As shown, a cleaning device for a high-temperature monitoring system includes a propulsion mechanism 1, a mechanical cleaning assembly 2, a mounting flange 3, and a controller (not shown). The mounting flange 3 is a disc-shaped connector with a central through hole, one side of which is sealed to the outer wall of an industrial pipeline or the protective cover of the high-temperature monitoring equipment. The industrial pipeline or the protective cover has a cleaning channel communicating with the central through hole.

[0017] The propulsion mechanism 1 is fixed to the other side of the mounting flange 3. The propulsion mechanism 1 includes a propulsion drive unit 11, the fixed end of which is connected to the base of the propulsion mechanism 1. A fixed guide block 12 is fixed to the base of the propulsion mechanism 1. A sliding slider 13 is slidably disposed on the fixed guide block 12 and is driven by the propulsion drive unit 11 to perform reciprocating linear motion along the guiding direction of the fixed guide block 12. A guide limiting block 14 is fixed between the fixed guide block 12 and the mounting flange 3 to limit the stroke of the sliding slider 13.

[0018] The mechanical cleaning assembly 2 includes a cleaning rod 21 and a cleaning head 22. The cleaning rod 21 passes through and is fixed to the sliding block 13, and the front end of the cleaning rod 21 passes through the central through hole of the mounting flange 3 and extends into the cleaning channel. The cleaning head 22 is mounted on the front end of the cleaning rod 21. The controller is electrically connected to the propulsion drive unit 11 and is used to control the operation of the propulsion drive unit 11.

[0019] Specifically, such as Figure 1 As shown, the propulsion mechanism 1 is directly mounted on the outer wall of the industrial pipeline or the protective cover of the high-temperature monitoring equipment via the mounting flange 3. If directly mounted on the outer wall of the industrial pipeline, a cleaning channel is provided in the pipeline wall. The propulsion mechanism 1 is directly and sealingly connected to the pipeline wall via the mounting flange 3, requiring no additional mounting base.

[0020] The propulsion drive unit 11 provides the extension and retraction power, driving the sliding slider 13 to reciprocate linearly along the guide direction of the fixed guide block 12. The fixed guide block 12 provides precise motion guidance for the sliding slider 13, ensuring the straightness of the motion trajectory and preventing swaying and jamming. The guide limit block 14 is installed at the extreme position of the motion path to mechanically limit the movement stroke of the sliding slider 13, providing over-limit protection.

[0021] The propulsion drive unit 11 can be an electric actuator or a pneumatic actuator. When using an electric actuator, a high-temperature resistant type with a temperature resistance rating of ≥150℃ is preferred, which has a self-locking function to prevent slippage after power failure. The propulsion speed can be adjusted within the range of 5-50mm / s, and the stroke can be selected from 200-1000mm depending on the pipe diameter. For example, an electric actuator with a rated thrust of 500N, a stroke of 500mm, and a propulsion speed of 30mm / s can be used.

[0022] When using a pneumatic actuator, a double-acting cylinder is preferred, with an air source pressure range of 0.4-0.8MPa. The extension and retraction are controlled by a solenoid valve, and it has an automatic retraction protection function in case of air loss, so as to ensure that the cleaning rod can automatically retract in the event of air source failure, avoiding damage caused by prolonged exposure to high temperature.

[0023] The mechanical cleaning assembly 2 is connected to and driven by the propulsion mechanism 1. This assembly includes a cleaning rod 21 and a cleaning head 22. The cleaning rod 21 passes through and is fixed to the sliding block 13, with its front end extending through the mounting flange 3 into the cleaning channel (i.e., the pipe wall opening), and can extend into the interior of the industrial pipe via the cleaning channel. The cleaning head 22 is mounted at its front end. Driven by the cleaning rod 21, the cleaning head 22 directly scrapes or breaks up the accumulated ash deposited on the inner wall of the pipe.

[0024] Furthermore, the cleaning rod 21 can be solid or hollow, made of high-temperature resistant materials such as 310S stainless steel or Inconel alloy to ensure sufficient strength and rigidity in high-temperature environments. The cleaning head 22 is made of high-temperature resistant and wear-resistant materials such as silicon carbide, ceramic, or hard alloy to ensure that it is not easily worn during long-term use. For example, the cleaning rod 21 is a solid 310S stainless steel rod with a diameter of 20mm, its rear end is fixedly connected to the sliding slider 13 by threads, and its front end is equipped with a shovel-shaped cleaning head 22 made of silicon carbide. The cleaning rod 21 passes through the mounting flange 3 and extends into the pipe through the cleaning channel.

[0025] The mounting flange 3 serves as the core connecting component between the propulsion mechanism 1 and the outer wall of the industrial pipeline or the protective cover of the high-temperature monitoring equipment, enabling a sealed and fixed connection between the two. By employing the mounting flange 3, the cleaning device of this disclosure eliminates the need for a separate mounting base as required by existing technologies, allowing direct connection to on-site equipment, greatly simplifying the installation structure and improving space utilization.

[0026] Furthermore, a friction-reducing layer or a linear bearing is provided on the contact surface between the fixed guide block 12 and the sliding slider 13 to reduce friction. That is, a friction-reducing structure is provided between the fixed guide block 12 and the sliding slider 13. For example, a polytetrafluoroethylene friction-reducing layer or a linear bearing can be provided on the guide surface of the fixed guide block 12 (the contact surface with the sliding slider 13) to reduce frictional resistance and ensure smooth extension and retraction. The fixed guide block 12 can be made of stainless steel, and the guide limit block 14 is used to limit the extreme movement position of the sliding slider 13.

[0027] The fixed guide block 12 is provided with a guide rod, and the sliding slider 13 is provided with a sliding sleeve that matches the guide rod, so that the sliding slider 13 slides along the fixed guide block 12 in a directional manner.

[0028] For example, the controller is configured to include at least one of a timed trigger mode, a differential trigger mode, and a manual control mode. The timed trigger mode controls the propulsion drive unit 11 to operate according to a preset time period. The differential trigger mode controls the propulsion drive unit 11 to operate when the deviation between the measured temperature and a preset reference temperature exceeds a threshold. The manual control mode allows manual operation of the propulsion drive unit 11, initiated by an operator. The controller is electrically connected to the propulsion drive unit 11 and is used to control the automatic operation of the cleaning device, causing the cleaning rod 21 to drive the cleaning head 22 to clean the accumulated dust.

[0029] The controller uses a PLC controller and communicates with the propulsion drive unit 11, the position detection unit (not shown in the figure, but can be installed near the sliding slider 13), and the high-temperature monitoring system. In the differential trigger mode, the temperature deviation threshold can be adjusted within the range of 10-50℃ to adapt to the monitoring accuracy requirements of different working conditions. As a specific example, the temperature deviation threshold in the differential trigger mode is set to 20℃. When the temperature measured by the high-temperature monitoring system deviates from the preset reference temperature by more than 20℃, the controller starts the cleaning program. The position detection unit can be integrated into the propulsion mechanism 1, for example, using a magnetic proximity switch or photoelectric encoder, to detect the position of the sliding slider 13 in real time, with a positioning accuracy of ±1mm, ensuring that the cleaning head 22 can accurately reach the dust accumulation position.

[0030] The controller is also configured to support multiple cleaning strategies to meet the needs of different levels of dust accumulation: for example, a single-point cleaning mode, which advances to a designated location, pauses for a period of time to clean, and automatically retracts upon completion, suitable for localized dust accumulation; a segmented cleaning mode, which pauses in sections during the advance to clean, covering areas of different depths, suitable for situations with deeper pipes; and a reciprocating cleaning mode, which advances and retracts multiple times to enhance the cleaning effect, suitable for situations with thicker or harder dust accumulation.

[0031] Taking the single-point cleaning mode as an example, the propulsion drive unit 11 drives the sliding slider 13 forward along the fixed guide block 12, causing the cleaning rod 21 and cleaning head 22 to extend into the preset position (temperature measuring optical path area), stay for 10 seconds, scrape off the accumulated dust with the cleaning head 22, and then automatically retract. During the cleaning process, the controller sends a signal to the high-temperature monitoring system to pause data acquisition. After the cleaning is completed, the high-temperature monitoring system resumes normal monitoring.

[0032] For example, the controller is also communicatively connected to the control unit of the high-temperature monitoring system. The controller is further configured to send a signal to the high-temperature monitoring system when the propulsion drive unit 11 is operating, causing the high-temperature monitoring system to pause temperature data acquisition or mark the acquired data. The controller's communicative connection with the control unit of the high-temperature monitoring system enables coordinated control. Specifically, when the cleaning device is running, the controller sends a signal to the high-temperature monitoring system to pause data acquisition or mark the acquired data as "cleaning in progress." After cleaning is complete and the cleaning head is fully retracted, the high-temperature monitoring system is notified to resume normal monitoring. This avoids misinterpreting interference data during the cleaning process as actual temperature changes.

[0033] For example, the controller monitors the operating current of the propulsion drive unit 11 or the feedback position signal. When an abnormality is detected, it controls the propulsion drive unit 11 to reverse and retract the mechanical cleaning assembly. Specifically, the cleaning device of the embodiments of this disclosure further includes a safety protection mechanism, which includes a temperature monitoring module and mechanical and electrical limit switches integrated in the propulsion mechanism. When the monitored temperature exceeds a set safety value, or when the sliding slider 13 is detected to be outside its normal range of motion or the cleaning head encounters abnormal resistance, the controller will immediately control the propulsion drive unit 11 to retract the cleaning assembly to prevent equipment damage.

[0034] For example, the guide limit block 14 acts as a mechanical limit switch. When the sliding slider 13 touches the guide limit block 14, the drive circuit is disconnected, and the cleaning rod stops. At the same time, the controller is also equipped with current monitoring. When an abnormal increase in drive current is detected (indicating resistance), the controller immediately commands the cleaning rod to reverse and retract, ensuring the safety of the equipment and pipeline.

[0035] The cleaning device of this disclosure adopts an integrated propulsion mechanism and mounting flange, resulting in a compact overall structure and convenient installation. The precise cooperation between the sliding slider 13 and the fixed guide block 12 ensures smooth and reliable movement. It can automatically initiate cleaning based on changes in monitored temperature, effectively guaranteeing the long-term stable operation and temperature measurement accuracy of the high-temperature monitoring system.

[0036] For example, the connection between the mounting flange 3 and the outer wall of the industrial pipeline or the protective cover of the high-temperature monitoring equipment is provided with a sealing structure, including a metal flange, a high-temperature resistant gasket, and fasteners. The high-temperature resistant gasket is made of ceramic fiber or graphite composite material, with a temperature resistance of ≥800℃, which can effectively prevent the leakage of high-temperature flue gas.

[0037] Furthermore, in embodiments of this disclosure, the cleaning device and the high-temperature monitoring system are arranged in parallel on the same or adjacent cross-sections of the industrial pipeline, and the cleaning area of ​​the cleaning head should completely cover the temperature measurement optical path area of ​​the high-temperature monitoring system. This layout ensures that the cleaning device can effectively remove accumulated dust within the monitoring area, thereby guaranteeing temperature measurement accuracy.

[0038] The cleaning device for a high-temperature monitoring system according to the embodiments of this disclosure has the following beneficial effects: Simplified Structure: Eliminates the need for a separate mounting base, allowing direct installation on pipes or equipment, reducing the number of components and lowering manufacturing costs. Improved Sealing: Reduces connection interfaces, lowering the risk of high-temperature gas leakage. Guaranteed Temperature Measurement Accuracy: Timely removal of accumulated dust from the observation channel ensures the accuracy and response speed of infrared temperature measurement. Increased Production Efficiency: Enables fully automated online cleaning, avoiding downtime for maintenance and extending continuous production cycles. Reduced Maintenance Costs: Automated operation reduces manual intervention and lowers the risk of high-temperature operations. Enhanced System Reliability: The propulsion mechanism features self-locking and protection functions, a simple structure, and a low failure rate. High Adaptability: Adjustable propulsion stroke, speed, and cleaning head shape adapt to different pipe diameters and dust accumulation characteristics. High Safety: Equipped with multiple safety protections, automatically retracting in case of abnormalities to prevent equipment damage.

[0039] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of this disclosure, and this disclosure is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and substance of this disclosure, and these modifications and improvements are also considered to be within the scope of protection of this disclosure.

Claims

1. A cleaning device for a high-temperature monitoring system, characterized in that, The cleaning device includes a propulsion mechanism, mechanical cleaning components, a mounting flange, and a controller; The mounting flange is a disc-shaped connector with a central through hole, one side of which is sealed to the outer wall of an industrial pipeline or the protective cover of a high-temperature monitoring device. The industrial pipeline or the protective cover has a cleaning channel that communicates with the central through hole. The propulsion mechanism is fixed to the other side of the mounting flange, and the propulsion mechanism includes: A propulsion drive unit, the fixed end of which is connected to the base of the propulsion mechanism; A fixed guide block is fixed to the base of the propulsion mechanism; A sliding block is slidably mounted on the fixed guide block and is connected to the power output end of the propulsion drive unit. The propulsion drive unit drives the sliding block to reciprocate linearly along the guide direction of the fixed guide block. A guide limit block, which is fixed between the fixed guide block and the mounting flange, is used to limit the stroke of the sliding slider; The mechanical cleaning assembly includes a cleaning rod and a cleaning head; the cleaning rod passes through and is fixed to the sliding block, and the front end of the cleaning rod passes through the central through hole of the mounting flange and extends into the cleaning channel; and the cleaning head is mounted on the front end of the cleaning rod. The controller is electrically connected to the propulsion drive unit and is used to control the operation of the propulsion drive unit.

2. The cleaning device according to claim 1, characterized in that, The propulsion drive unit is an electric push rod or a pneumatic actuator.

3. The cleaning device according to claim 1, characterized in that, The fixed guide block is provided with a guide rod, and the sliding slider is provided with a sliding sleeve that matches the guide rod, so that the sliding slider slides along the fixed guide block in a directional manner.

4. The cleaning device according to claim 1 or 3, characterized in that, The contact surface between the fixed guide block and the sliding slider is provided with a friction-reducing layer or equipped with a linear bearing to reduce friction.

5. The cleaning device according to claim 1, characterized in that, The controller is configured to include at least one of a timed trigger mode, a differential trigger mode, and a manual control mode; wherein... The timed trigger mode controls the propulsion drive unit to work according to a preset time period; the difference trigger mode controls the propulsion drive unit to work when the deviation between the measured temperature and the preset reference temperature exceeds a threshold; the manual control mode allows manual operation to control the propulsion drive unit to work.

6. The cleaning device according to claim 1, characterized in that, The controller is also communicatively connected to the control unit of the high-temperature monitoring system, and is further configured to send a signal to the high-temperature monitoring system when the propulsion drive unit is working, so that the high-temperature monitoring system suspends temperature data acquisition or marks the acquired data.

7. The cleaning device according to claim 1, characterized in that, The controller monitors the propulsion drive unit based on its operating current or feedback position signal. When an abnormality is detected, it controls the propulsion drive unit to reverse and retract the mechanical cleaning assembly.

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