A device for detecting edge tearing of coal conveyor belts

Abstract

This utility model relates to the field of coal conveyor belt inspection, specifically disclosing a device for detecting edge tearing conditions of coal conveyor belts. The device includes a photoelectric sensor array unit, a signal processing module, and a self-cleaning mechanism. The photoelectric sensor array unit includes several infrared laser emitters and laser receivers, which are respectively disposed at the upper and lower ends of the belt. The signal processing module integrates a filtering circuit and a microprocessor. The self-cleaning mechanism includes an air nozzle aligned with the infrared laser emitter / receiver. The purpose of this utility model is to solve the technical problem of accurately detecting edge tearing conditions of coal conveyor belts.

Description

Technical Field

[0001] This utility model relates to the field of coal conveyor belt inspection, and specifically discloses a coal conveyor belt edge tear detection device. Background Technology

[0002] As a key transportation equipment in industrial sectors such as coal mines and thermal power plants, coal conveyor belts are responsible for the continuous transport of hundreds of tons of material per hour. During long-term operation, the belts are susceptible to damage from factors such as impacts from large coal particles, scratches from foreign metal objects, or abnormal friction from the mechanical structure, leading to frequent edge tearing accidents.

[0003] Existing detection methods include: 1. Mechanical detection, which uses support rollers and torque sensors to determine belt tension based on speed differences. While such devices can monitor overall tearing, they lack sensitivity to early, minute cracks, and coal ash adhesion can easily lead to misjudgments; 2. Visual detection technology, which uses the Canny edge detection algorithm to identify cracks, but it is significantly affected by changes in lighting and coal dust interference, with dynamic detection accuracy only reaching the centimeter level.

[0004] Existing technologies generally suffer from contradictions in detection accuracy, environmental adaptability, and economy. Therefore, there is an urgent need to develop a new detection device that combines micro-tear recognition capability, strong anti-interference ability, and easy deployment. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a device for detecting the edge tearing condition of a coal conveyor belt, so as to solve the technical problem of how to accurately detect the edge tearing condition of a coal conveyor belt.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A device for detecting edge tearing on a coal conveyor belt includes a photoelectric sensor array unit, a signal processing module, and a self-cleaning mechanism. The photoelectric sensor array unit includes several infrared laser emitters and receivers, which are respectively positioned at the upper and lower ends of the belt. The signal processing module integrates a filtering circuit and a microprocessor. The self-cleaning mechanism includes air nozzles aligned with the infrared laser emitters / receivers. The photoelectric sensor array unit forms a scanning light curtain through the laser emitters and receivers to detect tearing at the belt edge. If a tear is found, the infrared laser can penetrate the belt, and the laser receiver receives the laser light, thus identifying the location of the tear. During coal transportation, a large amount of dust is generated, which can contaminate the infrared laser sensors and receivers. This solution incorporates air nozzles that clean both the sensors and receivers upon activation.

[0008] Optionally, the photoelectric sensor array unit includes a first flipping mechanism and a second flipping mechanism. Both the first and second flipping mechanisms include a motor and a rotating shaft, with the rotating shaft connected to the motor. The first flipping mechanism is used to drive the infrared laser emitter. Using this solution, the infrared laser emitter and laser receiver can be rotated to align with the air nozzle before the air nozzle is activated for cleaning, resulting in better performance.

[0009] Optionally, the two sets of air nozzles are respectively positioned above the infrared laser emitter and on the side of the laser receiver.

[0010] Optionally, a protective mechanism is also included. The second flipping mechanism drives the protective mechanism to rotate. The protective mechanism includes a partially annular protective plate that surrounds the laser receiver. A groove is formed on the protective plate, and the groove is aligned with the laser receiver. When the protective plate rotates above the laser receiver, it can protect the laser receiver from being damaged by falling coal.

[0011] Optionally, the air nozzles located on the side of the laser receiver are disposed inside the protective plate.

[0012] Optionally, the self-cleaning mechanism further includes a fan with an air duct. The air duct has a branch that forms two air outlets, which are respectively connected to two air nozzles. The air duct is a flexible hose that can be bent.

[0013] Optionally, the system also includes a frame on which the photoelectric sensor array unit, signal processing module, self-cleaning mechanism, and flipping mechanism are all mounted.

[0014] The working principle and beneficial effects of this solution are as follows:

[0015] This solution uses photoelectric laser sensors to detect the degree of belt damage. It offers high accuracy, good results, requires no manual operation, and is cost-effective. It also includes air nozzles; the photoelectric laser sensor can rotate to align with the air nozzles, allowing the nozzles to clean the belt. During actual operation, coal may fall. If this occurs, the photoelectric laser sensor can detect the change and activate the motor, which then drives the protective plate to rotate, providing a protective function.

[0016] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an embodiment;

[0018] Figure 2 This is a partial structural diagram of the embodiment.

[0019] The following are the markings in the attached diagram: 1. Coal conveyor belt; 2. Frame; 3. Motor; 4. First mounting rod; 5. Infrared laser emitter; 6. Protective plate; 7. Fan; 8. Ventilation plate; 9. Air nozzle; 10. Tank; 11. Laser receiver. Detailed Implementation

[0020] The following detailed description illustrates the specific implementation method:

[0021] Example

[0022] A device for detecting edge tearing of a coal conveyor belt, such as... Figures 1-2 As shown, it includes a frame 2, a photoelectric sensor array unit, a signal processing module, and a self-cleaning mechanism. The photoelectric sensor array unit, the signal processing module, and the self-cleaning mechanism are all mounted on the frame 2.

[0023] The self-cleaning mechanism includes two sets of air nozzles 9, a fan 7, and an air duct. The fan 7 is fixedly mounted on the frame 2, and the air duct is connected to the fan 7. The air duct has a branch forming two air outlets, each connected to an air nozzle 9. Each air nozzle 9 includes a ventilation plate 8 and a nozzle body. The ventilation plate 8 is hollow and connected to all nozzle bodies. The dimensions of both the ventilation plate 8 and the nozzle bodies can be customized. The air duct is a flexible hose. This air duct structure is a very common existing technology; the duct structure is not shown in the figure.

[0024] The photoelectric sensor array unit includes several infrared laser emitters 5, laser receivers 11, a first flipping mechanism, a second flipping mechanism, and a protection mechanism.

[0025] The infrared laser emitter 5 is located at the lower end of the laser receiver 11, which is fixedly mounted on the frame 2.

[0026] Both the first and second flipping mechanisms include a motor 3 and a rotating shaft, which is coaxially and fixedly connected to the output end of the motor 3. The rotating shaft is mainly used to connect the components driven by the motor 3, and is not shown in the figure. The first flipping mechanism is located above the second flipping mechanism. The motor 3 of the first flipping mechanism is fixedly mounted on the frame 2, and a first mounting rod 4 is coaxially and fixedly mounted on its rotating shaft. The laser emitters are all mounted on the first mounting rod 4 and face vertically downwards.

[0027] A protective mechanism is used to protect the laser receiver 11. The protective mechanism includes a partially annular protective plate 6 that surrounds the laser receiver 11. A groove 10 is formed on the protective plate 6 and aligned with the laser receiver 11. The protective plate 6 is located below the belt and is rotatably mounted on the frame 2 towards one end of the belt. An air nozzle 9 is fixedly installed inside the protective plate 6. The rotating shaft of the motor 3 of the second flipping mechanism is concentrically connected to the protective plate 6.

[0028] In practice:

[0029] The infrared laser emitter 5 emits laser light to the laser receiver 11. When the laser receiver 11 receives the signal, it indicates a tear at the edge of the coal conveyor belt 1, allowing for the detection of the tear location. Since the infrared laser emitter 5 and laser receiver 11 operate for extended periods, and the environment around the coal conveyor belt 1 is dusty, they easily accumulate dust, leading to inaccurate detection and requiring frequent cleaning. This embodiment includes a self-cleaning mechanism comprising an air nozzle 9. A fan 7 generates airflow, which is delivered to the air nozzle 9 via a duct. The infrared laser emitter 5 rotates upwards under the drive of the motor 3 of the first flipping mechanism, then the fan 7 is activated, and the airflow is delivered to the air nozzle 9 through the duct for cleaning. The laser receiver 11 is fixedly mounted. The second flipping mechanism aligns the air nozzle 9 with the laser receiver 11 by rotating the protective plate 6 for cleaning. Because the duct is a flexible hose, the duct remains undamaged even when the air nozzle 9 rotates. Simultaneously, the rotating protective plate 6 also protects the laser receiver 11 from damage by falling coal dust.

[0030] The above description is merely an embodiment of this utility model, and common knowledge such as specific structures and characteristics in the solution is not described in detail here. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model, and these should also be considered within the protection scope of this utility model. These modifications and improvements will not affect the effectiveness of the implementation of this utility model or its practicality.

Claims

1. A coal belt edge tear condition detection apparatus, characterized by: The device includes a photoelectric sensor array unit, a signal processing module, and a self-cleaning mechanism. The photoelectric sensor array unit includes several infrared laser emitters and laser receivers, which are respectively located at the upper and lower ends of the belt. The signal processing module integrates a filter circuit and a microprocessor. The self-cleaning mechanism includes an air nozzle, which is aligned with the infrared laser emitter / laser receiver.

2. The coal belt edge tear condition detection apparatus according to claim 1, characterized by: The photoelectric sensor array unit includes a first flipping mechanism and a second flipping mechanism. Both the first flipping mechanism and the second flipping mechanism include a motor and a rotating shaft, and the rotating shaft is connected to the motor. The first flipping mechanism is used to drive the infrared laser emitter.

3. A coal belt edge tear condition detection apparatus according to claim 2, characterised in that: The two sets of air nozzles are respectively positioned above the infrared laser emitter and on the side of the laser receiver.

4. The equipment for detecting edge tearing of a coal conveyor belt according to claim 3, characterized in that: It also includes a protective mechanism, wherein the second flipping mechanism is used to drive the protective mechanism to rotate. The protective mechanism includes a partially annular protective plate that surrounds the laser receiver and has a groove formed on the protective plate that is aligned with the laser receiver.

5. The equipment for detecting edge tearing of a coal conveyor belt according to claim 4, characterized in that: The air nozzles located on the side of the laser receiver are housed inside the protective plate.

6. The equipment for detecting edge tearing of a coal conveyor belt according to claim 5, characterized in that: The self-cleaning mechanism also includes a fan with an air duct. The air duct has a branch that forms two air outlets, which are connected to two air nozzles respectively. The air duct is a flexible hose that can be bent.

7. The equipment for detecting edge tearing of a coal conveyor belt according to claim 6, characterized in that: It also includes a frame, on which the photoelectric sensor array unit, signal processing module, self-cleaning mechanism and flipping mechanism are all mounted.

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