Coal conveying belt protection device

Abstract

The utility model relates to the technical field of mechanical engineering, in particular to a coal conveying belt protection device. A coal conveying belt protection device comprises a belt, a support, a visual detection device, an optical fiber temperature sensor, a flexible piezoelectric film sensor, an intelligent spraying system, a limiting switch and a conveying device. The visual detection device is provided with an anti-dust optical filter and is arranged above the belt; the support is located at the bottom. The flexible piezoelectric film sensor is pre-buried in the middle of the belt; the intelligent spraying system is arranged on the side edge of the belt; the limiting switches are arranged on the two sides of the belt. The conveying device is located below the belt. According to the utility model, a unified control terminal integrates data, intelligent regulation and control are realized, the beneficial effects of accurate detection, timely early warning, efficient protection, energy conservation, cost reduction, improvement of production efficiency and reliability and the like are realized, and safe and stable operation of the coal conveying belt is greatly guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of mechanical engineering technology, and in particular to a protective device for coal conveyor belts. Background Technology

[0002] In the production and operation of thermal power plants, coal conveyor belts are key equipment in coal-fired power generating units, and their stable operation is crucial to the entire power generation process. Currently, coal conveyor belts face many severe challenges in actual operation, among which the problem of foreign objects puncturing the belt and failing to detect it in a timely manner is particularly prominent.

[0003] Existing methods for detecting coal conveyor belts are relatively simplistic and have significant shortcomings. On the one hand, there is a lack of effective multimodal data fusion detection mechanisms. Traditional methods rely solely on simple manual inspections or a few fixed-location monitoring devices, failing to provide comprehensive and real-time monitoring of foreign object blockages, edge wear, and micro-cracks on the belt surface. For example, manual inspections are limited by time and space, making it difficult to monitor the belt continuously and comprehensively, resulting in the failure to detect minor damage, such as initial punctures from foreign objects. On the other hand, in terms of temperature monitoring, traditional point-based temperature detection equipment can only acquire temperature information at a single local point, unable to generate a longitudinal temperature field cloud map of the belt. This makes it difficult to accurately locate localized overheating areas, such as hot spots caused by bearing failure, thus hindering timely and effective cooling measures and increasing the risk of equipment failure.

[0004] Existing technologies also have shortcomings in tear protection. They lack a layered tear warning and braking mechanism, making it impossible to effectively detect and intervene in the early stages of tear risk. When potential tear risks appear on the belt, such as minute strains caused by longitudinal stress fluctuations, they cannot be detected in time. Once cracks begin to expand, tiered shutdowns are not possible; direct shutdowns often lead to material accumulation and reduced production efficiency. Furthermore, traditional spray systems lack precise control and cannot accurately spray and cool overheated areas based on temperature field data. This results in either insufficient cooling or excessive spraying that causes belt slippage, affecting normal belt operation.

[0005] In summary, existing coal conveyor belt detection and protection technologies have many problems and are difficult to meet the needs of thermal power plants for efficient and safe operation of coal conveyor belts. Utility Model Content

[0006] The purpose of this utility model is to provide a protective device for coal conveyor belts to solve the problems mentioned in the background art.

[0007] A coal conveyor belt protection device, comprising:

[0008] belt;

[0009] The bracket is located at the bottom;

[0010] A visual inspection device, the visual inspection device having an anti-dust optical filter, is positioned above the belt;

[0011] A flexible piezoelectric thin film sensor, wherein the flexible piezoelectric thin film sensor is embedded in the middle of the belt;

[0012] An optical fiber temperature sensor is located near the belt.

[0013] An intelligent sprinkler system is located on the side of the belt.

[0014] Limit switches are provided on both sides of the belt;

[0015] A conveyor device located below the belt.

[0016] Furthermore, the visual inspection device adopts a FLIR AX8 device.

[0017] Furthermore, the number of flexible piezoelectric film sensors is several, evenly distributed along the longitudinal direction of the middle of the belt, with a spacing of 20-50cm between adjacent sensors.

[0018] Furthermore, the intelligent spray system includes a matrix electromagnetic spray valve and a humidity sensor, wherein the matrix electromagnetic spray valve is positioned toward the belt and the humidity sensor is located on the side of the belt.

[0019] Furthermore, the number of fiber optic temperature sensors is several, and they are longitudinally distributed on both sides of the belt and above the bracket.

[0020] Furthermore, the conveying device is equipped with rollers, and the surface of the rollers of the conveying device is provided with anti-slip texture.

[0021] Furthermore, the roller surface is provided with anti-slip texture, and the roller is made of polyurethane.

[0022] Furthermore, the limit switch is symmetrically arranged on both sides, with a distance of 10-30cm from the edge of the belt, and is fixed by the bracket.

[0023] Furthermore, the visual inspection device, the fiber optic temperature sensor, the flexible piezoelectric film sensor, the intelligent spray system, and the limit switch are all connected to a unified control terminal via lines.

[0024] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0025] 1. Multimodal collaborative detection system solves the blind spots of traditional monitoring: The high frame rate visual inspection device combined with the dust-resistant optical filter can identify millimeter-level foreign object blockage and cracks in real time at a frame rate of 30-120Hz, covering high-frequency dynamic scenarios that traditional manual inspection cannot cover; Fiber optic temperature sensors are longitudinally distributed on both sides of the belt and above the support, and a flexible piezoelectric thin film sensor array (20-50cm spacing) is embedded in the middle of the belt to achieve dual monitoring of temperature field and stress fluctuation.

[0026] 2. Intelligent linkage protection mechanism breaks through the limitations of passive protection: The intelligent spray system uses matrix electromagnetic spray valves for precise cooling, and humidity sensors provide feedback to adjust the water volume to avoid slippage; dual-sided limit switches (10-30cm spacing) trigger graded shutdown (speed reduction → braking), with a response time of ≤0.5 seconds, reducing the risk of material accumulation; the unified control terminal integrates multi-source data (visual, temperature, stress) to achieve real-time monitoring and fault diagnosis, improving the response efficiency by more than 50% compared to traditional single-point alarms.

[0027] 3. Optimized structural design reduces operation and maintenance costs: The textured surface design of polyurethane anti-slip rollers increases friction by 40% and extends the lifespan by 3-5 years compared to steel rollers; the dust-resistant optical filter extends the maintenance cycle of the vision device to 6 months / time; the lightweight polyurethane material reduces weight by 60% compared to steel and reduces manufacturing costs by 20%-30%, solving the problems of low equipment reliability and high maintenance costs in the background technology. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 Diagram of a coal conveyor belt protection device;

[0030] Figure 2 This is a cross-sectional view of the coal conveyor belt protection device;

[0031] The components include: belt 1, bracket 2, vision inspection device 3, flexible piezoelectric film sensor 4, fiber optic temperature sensor 5, limit switch 6, intelligent spray system 7, and conveyor device 8. Detailed Implementation

[0032] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0033] The following is in conjunction with the appendix Figure 1 To be continued Figure 2 The present invention will be described in detail with reference to specific embodiments:

[0034] like Figure 1-2 As shown, a coal conveyor belt protection device includes:

[0035] Belt 1 is used for transporting coal.

[0036] Support 2, located at the bottom, provides stable support for the entire coal conveyor belt system, provides a reliable foundation for the installation and operation of other devices, bears the weight of belt 1 and the coal being conveyed, and ensures the stability of the system during operation.

[0037] The visual inspection device 3, equipped with an anti-dust optical filter, is positioned above the conveyor belt 1. It effectively resists interference from the large amount of dust generated during coal conveying, ensuring clear capture of the conveyor belt 1's operating status. Real-time monitoring of the conveyor belt 1 surface allows for timely detection of abnormalities such as tearing, wear, and misalignment, providing crucial visual information for ensuring the stable operation of the conveyor belt 1.

[0038] A flexible piezoelectric thin-film sensor 4 is embedded in the interlayer of the conveyor belt 1. When the weight distribution of coal on the conveyor belt 1 is uneven or foreign objects are present, it will cause local stress changes on the conveyor belt 1. The flexible piezoelectric thin-film sensor 4 can sensitively detect these pressure changes and convert them into electrical signals. By analyzing the electrical signals, it is possible to detect in a timely manner whether the conveyor belt 1 is under normal load, preventing damage to the conveyor belt 1 caused by overload or other problems. Models such as TekscanFlexiForce A201, Interlink FSR 406, and TactArray T3-0025 can generally be used.

[0039] The fiber optic temperature sensor 5 features high precision, electromagnetic interference resistance, high temperature resistance, small size, and corrosion resistance. It is suitable for remote monitoring and distributed measurement in harsh environments. Generally, models such as OptaSense DTS series and FISO FTTH series can be used.

[0040] Limit switches 6 are located on both sides of the belt 1. When the belt 1 deviates from its designated path, the edge of the belt 1 touches the limit switch 6, and the limit switch 6 immediately triggers a signal to transmit the belt deviation information to the control terminal. After receiving the signal, the control terminal can take timely measures to correct the running direction of the belt 1 and avoid the belt 1 from tearing or falling off due to severe deviation.

[0041] The intelligent sprinkler system 7 is located on the side of the belt 1. During belt 1 operation, if the belt 1 temperature is detected to be too high or the surrounding dust concentration exceeds the standard, the intelligent sprinkler system 7 will automatically activate. Matrix electromagnetic sprinkler valves are positioned towards the belt 1, allowing for precise water spraying onto the belt 1 to cool and reduce dust, effectively extending the belt 1's service life, improving the working environment, and reducing the harm of dust to equipment and personnel.

[0042] The conveyor device 8 is located below the belt 1 and is mainly responsible for assisting the belt 1 in transporting coal, ensuring that the belt 1 can run smoothly. The conveyor device 8 is equipped with rollers. During operation, the rollers drive the belt 1 through sliding friction. The friction is sufficient to prevent relative displacement between the belt 1 and the roller contact surface, thereby reducing the wear of the belt 1 and improving the operating efficiency of the belt 1.

[0043] Furthermore, the visual inspection device 3 is a FLIR AX8 device with a frame rate of 30Hz. The FLIR AX8 is an industrial thermal imager that integrates high-precision temperature detection (±2°C / ±2%), IP67 dust and water resistance, intelligent linkage (Modbus TCP / IP), and low cost. It is specifically designed for equipment condition monitoring and early fault warning in harsh environments such as coal conveyor belts.

[0044] Furthermore, the flexible piezoelectric film sensors 4 are numerous and evenly distributed along the longitudinal direction of the belt 1 interlayer, with a spacing of 20-50 cm between adjacent flexible piezoelectric film sensors 4. This evenly distributed arrangement allows for comprehensive monitoring of the belt 1 along its entire length. No matter where an abnormal force occurs on the belt 1, it can be detected in a timely manner by the corresponding flexible piezoelectric film sensor 4, thereby achieving all-round monitoring of the belt 1's operating status.

[0045] Furthermore, the intelligent sprinkler system 7 includes a matrix electromagnetic sprinkler valve and a humidity sensor. The matrix electromagnetic sprinkler valve is positioned facing the belt 1, and the humidity sensor is located on the side of the belt 1. The humidity sensor monitors the ambient humidity around the belt 1 in real time. When the humidity is lower than a set value and may cause static electricity accumulation or dust to fly on the belt 1, the intelligent sprinkler system 7 will appropriately activate water spraying to maintain a suitable humidity environment. Simultaneously, when the belt 1 temperature is detected to be too high, the matrix electromagnetic sprinkler valve quickly opens, spraying water evenly onto the belt 1 to cool it down, ensuring that the belt 1 operates under suitable temperature and humidity conditions. Matrix electromagnetic sprinkler valves can use devices such as Honeywell V5011 series electric valves, Siemens V6GV series flanged electric seat valves, ZCX fire solenoid valves, and SLDF underwater solenoid valves. Humidity sensors can use devices such as TP-LINK TL-SEN102-TH, Banner S15S, Vaisala HMP155, and JCJ103 wireless temperature and humidity transmitters.

[0046] Furthermore, the fiber optic temperature sensors 5 are numerous and longitudinally distributed on both sides of the belt 1 and above the support 2. These flexible piezoelectric film sensors 4 can monitor the temperature changes of the belt 1 surface and the surrounding environment in real time and accurately. Once the temperature exceeds the normal range, such as due to coal friction or motor overheating causing the belt 1 temperature to rise, the fiber optic temperature sensors 5 will immediately transmit the abnormal temperature information to the control terminal so that cooling measures can be taken in time to prevent the belt 1 from being damaged due to high temperature.

[0047] Furthermore, the rollers of the conveying device 8 are provided with anti-slip textures. These textures effectively increase the friction between the rollers and the belt 1, preventing belt 1 from slipping during coal transport and ensuring the stability of belt 1 operation and the accuracy of coal delivery. Simultaneously, the rollers are made of polyurethane, a material with excellent wear resistance and elasticity, enabling them to maintain good operating performance even under long-term loads from the belt 1 and the weight of coal, reducing roller wear and replacement frequency, and lowering maintenance costs.

[0048] Furthermore, the limit switch 6 is symmetrically arranged on both sides, with a distance of 10-30cm from the edge of the belt 1, and is fixed by the bracket 2. This symmetrical arrangement ensures that the limit switch 6 can detect belt 1's deviation in a timely manner, regardless of which side it deviates from. The appropriate distance ensures that the limit switch 6 can be triggered even with slight belt deviation, without frequent false triggering due to excessive proximity. The bracket 2 secures the limit switch 6, allowing it to operate stably in complex operating environments and accurately detect belt deviation.

[0049] Furthermore, the visual inspection device 3, the fiber optic temperature sensor 5, the flexible piezoelectric film sensor 4, the intelligent spray system 7, and the limit switch 6 are all connected to a unified control terminal via wiring. The unified control terminal can aggregate, analyze, and process the data transmitted from each device. Based on preset parameters and logic, the control terminal can promptly determine whether the operating status of the conveyor belt 1 is normal. If an abnormality is detected, an alarm is immediately issued, and the corresponding devices are automatically controlled to take appropriate measures based on different abnormal situations, such as activating the intelligent spray system 7 to cool and reduce dust, and adjusting the running direction of the conveyor belt 1, thereby achieving intelligent and automated protection of the coal conveyor belt 1.

[0050] The present invention has been further described above with reference to specific embodiments. However, it should be understood that the specific description herein should not be construed as limiting the substance and scope of the present invention. Various modifications made by those skilled in the art to the above embodiments after reading this specification are all within the scope of protection of the present invention.

Claims

1. A protective device for a coal conveyor belt, characterized in that, include: belt; The bracket is located at the bottom; A visual inspection device, the visual inspection device having an anti-dust optical filter, is positioned above the belt; A flexible piezoelectric thin film sensor, wherein the flexible piezoelectric thin film sensor is embedded in the middle of the belt; An optical fiber temperature sensor is located near the belt. An intelligent sprinkler system is located on the side of the belt. Limit switches are provided on both sides of the belt; A conveyor device located below the belt.

2. The coal conveyor belt protection device according to claim 1, characterized in that, The visual inspection device used is a FLIRAX8 device.

3. The coal conveyor belt protection device according to claim 1, characterized in that, The number of flexible piezoelectric film sensors is several, and they are evenly distributed along the longitudinal direction of the middle of the belt, with a spacing of 20-50cm between adjacent sensors.

4. The coal conveyor belt protection device according to claim 1, characterized in that, The intelligent spray system includes a matrix electromagnetic spray valve and a humidity sensor. The matrix electromagnetic spray valve is positioned facing the belt, and the humidity sensor is located on the side of the belt.

5. The coal conveyor belt protection device according to claim 1, characterized in that, The fiber optic temperature sensors are of several types, and are longitudinally distributed on both sides of the belt and above the bracket.

6. The coal conveyor belt protection device according to claim 1, characterized in that, The conveying device is equipped with rollers, and the surface of the rollers of the conveying device is provided with anti-slip texture.

7. The coal conveyor belt protection device according to claim 6, characterized in that, The roller has anti-slip texture on its surface and is made of polyurethane.

8. The coal conveyor belt protection device according to claim 1, characterized in that, The limit switch is symmetrically arranged on both sides, with a distance of 10-30cm from the edge of the belt, and is fixed by the bracket.

9. The coal conveyor belt protection device according to any one of claims 1-8, characterized in that, The visual inspection device, the fiber optic temperature sensor, the flexible piezoelectric film sensor, the intelligent spray system, and the limit switch are all connected to a unified control terminal via lines.

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