Light and heavy load detection mechanism for coal conveying belt

Abstract

The invention discloses a light and heavy load detection mechanism for a coal conveying belt, which belongs to the technical field of belt load detection and comprises a groove type conveying belt, the groove type conveying belt is composed of a conveying belt support and a concave belt, a plurality of detection frames are erected on the conveying belt support, and a laser emission mechanism and a high-speed industrial camera are mounted on the detection frames. The device further comprises a first cleaning mechanism and a second cleaning mechanism. The technical key points are that the belt load detection mechanism is simple in structure, low in cost and low in installation precision requirement, and the specific principle is that the laser emission mechanisms on the two sides emit linear laser strips to irradiate the lower end face of the concave belt, the laser is emitted to the high-speed industrial camera after being refracted and is received by the high-speed industrial camera, and under different load conditions, the detection precision is greatly improved. According to the present invention, the falling point and the incidence angle of the laser on the high-speed industrial camera can be changed so as to determine the current load condition of the concave surface belt, and in addition, the first cleaning mechanism and the second cleaning mechanism can clean the dust at the lens so as to improve the accuracy of the detection result.

Description

Technical Field

[0001] The invention relates to the technical field of belt load detection, in particular to a light and heavy load detection mechanism for a coal conveying belt. Background Art

[0002] Belt deviation is also a common fault in the operation of belt conveyors, which has a great impact on the normal production of coal mines. The materials transported by belt conveyors are mostly flammable items, such as coal, carbon and other materials. Belt deviation will cause the belt to overheat. If the temperature is too high, it will cause the coal to burn due to heat, which directly threatens the life safety of coal mine personnel and seriously affects the normal production of coal mines.

[0003] Belt deviation is primarily caused by uneven cargo distribution and overloading, necessitating controlled cargo distribution and component quality inspection. To address overload detection, existing methods include belt speed meters, belt scales, and video inspection, each with its own advantages and disadvantages. Belt speed meters are low-cost but require high installation accuracy; belt scales offer accurate detection but are expensive to install; and video inspection is susceptible to dust contamination, resulting in low image quality, which in turn affects the accuracy of image analysis systems. Therefore, to address these issues, a mechanism for detecting light and heavy loads on coal conveyor belts is proposed. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a light and heavy load detection mechanism for a coal conveyor belt. The belt load detection mechanism has a simple structure, low cost, and low installation precision requirements. The specific principle is that the laser emitting mechanisms on both sides emit linear laser strips to illuminate the lower end surface of the concave belt. After refraction, the laser will be emitted to the high-speed industrial camera and received by it. Under different load conditions, the position of the lower end surface of the concave belt will also change accordingly, that is, as the load continues to increase, the lower end surface of the concave belt will continue to move downward, which causes the laser entry point to change. Correspondingly, the landing point and entry angle of the laser on the high-speed industrial camera will also change. By analyzing the incident laser information with the high-speed industrial camera, it can be The current state of the concave belt is determined, and then the current load condition of the concave belt is determined, so as to realize the detection of the load condition of the concave belt and timely discover when the load is too large. In addition, the laser emitting mechanism and the high-speed industrial camera are respectively provided with a first cleaning mechanism and a second cleaning mechanism, which can clean the dust at the lens and improve the accuracy of the detection results. Moreover, since the laser emitting mechanism and the high-speed industrial camera lens are not large in area, the cleaning is not difficult. The first cleaning mechanism and the second cleaning mechanism can ensure the cleaning quality, which solves the technical problems of the belt load detection mechanism in the prior art, such as high cost, high installation difficulty and susceptibility to dust interference, which affects the accuracy of load detection.

[0005] The technical solution adopted by the embodiment of the present application to solve the technical problem is: A light and heavy load detection mechanism for a coal conveyor belt comprises a grooved conveyor belt, which is composed of a conveyor belt support and a concave belt, and the concave belt is driven to move by a motor installed on the conveyor belt support. In addition, a plurality of detection frames are mounted on the conveyor belt support, a laser emitting mechanism is symmetrically mounted on both sides of the detection frame to emit a laser that irradiates the lower end face of the concave belt, and a high-speed industrial camera is mounted in the middle of the detection frame to receive the laser reflected by the concave belt, wherein a first cleaning mechanism is mounted on the laser emitting mechanism to clean the lens of the laser emitting mechanism, and a second cleaning mechanism is mounted on both sides of the high-speed industrial camera to clean the lens of the high-speed industrial camera. The belt load detection mechanism has a simple structure, low cost, and low installation accuracy requirements. The specific principle is that the laser emitting mechanisms on both sides emit linear laser strips to illuminate the lower end surface of the concave belt. After refraction, the laser will be emitted to the high-speed industrial camera and received by it. Under different load conditions, the position of the lower end surface of the concave belt will also change accordingly. Correspondingly, the landing point and incident angle of the laser on the high-speed industrial camera will also change, thereby judging the current load condition of the concave belt. In addition, the laser emitting mechanism and the high-speed industrial camera are correspondingly provided with a first cleaning mechanism and a second cleaning mechanism, which can clean the dust at the lens and improve the accuracy of the detection results.

[0006] In one possible implementation, the laser emitting mechanism includes a hinged support fixedly mounted on a detection frame, on which a U-shaped frame is rotatably mounted via a rotating shaft, and a straight-line laser connected by bolts is mounted on the U-shaped frame. The above-mentioned installation form can adjust the inclination angle of the straight-line laser, which is convenient for debugging at different inclination angles during initial testing, reducing the difficulty of initial installation and debugging, and allowing debugging personnel to adjust the appropriate inclination angle according to actual conditions.

[0007] In one possible implementation, a locking screw is fixedly connected to the outer end of the rotating shaft, which passes through the hinge support and is threadedly connected to a locking wheel at the end. A rubber pad with a rough surface is fixed on the inner side of the locking wheel. When the inclination angle of the line laser needs to be fixed, the locking wheel is tightened, and the inclination angle of the line laser can be fixed by the friction between the locking wheel and the U-shaped frame.

[0008] In one possible implementation, the high-speed industrial camera lens is covered with a transparent and colorless glass cover, and the upper end surface of the glass cover is higher than the plane where the upper end surface of the high-speed industrial camera lens barrel is located. The above-mentioned structural form can protect the lens of the high-speed industrial camera with the glass cover to prevent it from being scratched during cleaning.

[0009] In one possible implementation, the first cleaning mechanism includes an L-shaped plate installed on the upper end surface of the line laser, with a first stepper motor installed therein, and a three-leaf plate fixedly connected to the output shaft of the first stepper motor. A cleaning brush layer that fits the line laser lens is affixed to the back of the three-leaf plate. When cleaning the line laser lens, the first stepper motor drives the three-leaf plate to rotate, thereby driving the cleaning brush layer to brush the surface of the line laser lens to complete the cleaning work.

[0010] In one possible implementation, the area of ​​the through-hole formed between the blades of the three-leaf plate is numerically larger than the lens area of ​​the line laser, and when the through-hole is directly opposite the lens of the line laser, its lens projection range is located within the range of the through-hole. The above-mentioned structural form can ensure that when detection is required, the strip laser emitted by the line laser can completely pass through the three-leaf plate without being blocked by it.

[0011] In one possible implementation, the second cleaning mechanism includes two L-shaped plates installed on both sides of the high-speed industrial camera, with a second stepper motor installed therebetween. The output shaft of the second stepper motor is fixedly connected to a scraper, and the back of the scraper is provided with a cleaning scraping layer that fits the glass cover. When cleaning the high-speed industrial camera lens, the second stepper motor drives the scraper to rotate, thereby driving the cleaning scraping layer to brush the surface of the glass cover to complete the cleaning work.

[0012] In one possible implementation, the second stepper motors on both sides of the high-speed industrial camera have the same rotation speed and opposite directions, and the corresponding two scrapers have the same initial direction. The above technical solution can ensure that the two scrapers scrape alternately in opposite directions, thereby ensuring better cleaning effect and faster cleaning rate.

[0013] In one possible implementation, the conveyor belt support includes a pillar, a longitudinal beam is fixedly provided on the top of the pillar, a number of cross beams are arranged between the longitudinal beams, side supports are fixedly provided on both sides of the cross beams, and side rollers with rotatable connections are installed on the side supports, which are in contact with the concave belt and provide rolling support for the concave belt through the side rollers, so that the concave belt can move under the drive of the motor to convey materials.

[0014] In one possible implementation, a middle bracket is fixedly provided in the middle of the crossbeam, and a rotatably connected auxiliary roller is installed on the middle bracket. When the concave belt is lightly loaded, it does not contact the auxiliary roller. When the concave belt is heavily loaded, it contacts the auxiliary roller. The above structure can play an auxiliary support role through the auxiliary roller when the concave belt is heavily loaded, thereby avoiding serious deformation of the concave belt and affecting subsequent normal use.

[0015] In summary, the present invention has the following beneficial technical effects: The belt load detection mechanism has a simple structure, low cost, and low installation accuracy requirements. The specific principle is that the laser emitting mechanisms on both sides emit linear laser strips to illuminate the lower end surface of the concave belt. After refraction, the laser will be emitted to the high-speed industrial camera and received by it. Under different load conditions, the position of the lower end surface of the concave belt will also change accordingly, that is, as the load continues to increase, the lower end surface of the concave belt will continue to move downward, which causes the laser entry point to change. Correspondingly, the landing point and entry angle of the laser on the high-speed industrial camera will also change. Through the analysis of the incident laser information by the high-speed industrial camera, the current state of the concave belt can be determined, and then the current load condition of the concave belt can be determined, thereby realizing the detection of the load condition of the concave belt and timely discovering when its load is too large. In addition, the laser emitting mechanism and the high-speed industrial camera are correspondingly provided with a first cleaning mechanism and a second cleaning mechanism, which can clean the dust at the lens and improve the accuracy of the detection results. Since the laser emitting mechanism and the high-speed industrial camera lens area are not large, cleaning is not difficult, so the first cleaning mechanism and the second cleaning mechanism can ensure the cleaning quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a cross-sectional view of the structure of the present invention; Figure 3 Schematic diagram of the detection structure of the present invention; Figure 4 Schematic diagram of the signal transmission structure of the present invention; Figure 5 Schematic diagram of the signal receiving structure of the present invention; Figure 6 Schematic diagram of the detection laser path of the present invention.

[0017] In the figure: 1. Conveyor belt support; 11. Pillar; 12. Longitudinal beam; 13. Cross beam; 14. Side support; 15. Side roller; 16. Middle support; 17. Auxiliary roller; 2. Concave belt; 3. Detection frame; 4. Laser emitting mechanism; 41. Hinge support; 42. U-shaped frame; 43. Linear laser; 44. Locking screw; 45. Locking wheel; 5. High-speed industrial camera; 51. Glass cover; 6. First cleaning mechanism; 61. L-shaped plate one; 62. First stepper motor; 63. Three-leaf plate; 64. Cleaning brush layer; 7. Second cleaning mechanism; 71. L-shaped plate two; 72. Second stepper motor; 73. Scraper; 74. Cleaning scraping layer. DETAILED DESCRIPTION

[0018] The technical solution in the embodiments of the present application is to solve the problems of the above-mentioned background technology, and the overall idea is as follows: like Figure 1 - Figure 3 As shown, the present embodiment provides a light and heavy load detection mechanism for a coal conveyor belt, comprising a grooved conveyor belt, which is composed of a conveyor belt support 1 and a concave belt 2, and the concave belt 2 is driven to move by a motor installed on the conveyor belt support 1. In addition, a number of detection frames 3 are mounted on the conveyor belt support 1, a laser emitting mechanism 4 is symmetrically mounted on both sides of the detection frame 3, for emitting a laser irradiated on the lower end face of the concave belt 2, a high-speed industrial camera 5 is mounted in the middle of the detection frame 3, for receiving the laser reflected from the concave belt 2, wherein a first cleaning mechanism 6 is mounted on the laser emitting mechanism 4, for cleaning the lens of the laser emitting mechanism 4, and a second cleaning mechanism 7 is mounted on both sides of the high-speed industrial camera 5, for cleaning the high-speed industrial camera 5. Camera 5 lens, the belt load detection mechanism has a simple structure, low cost, and low installation accuracy requirements. The specific principle is that the laser emitting mechanisms 4 on both sides emit linear laser strips to illuminate the lower end surface of the concave belt 2. After refraction, the laser will be emitted to the high-speed industrial camera 5 and received by it. Under different load conditions, the position of the lower end surface of the concave belt 2 will also change accordingly. Correspondingly, the landing point and incident angle of the laser on the high-speed industrial camera 5 will also change, thereby judging the current load condition of the concave belt 2. In addition, the laser emitting mechanism 4 and the high-speed industrial camera 5 are correspondingly provided with a first cleaning mechanism 6 and a second cleaning mechanism 7, which can clean the dust at the lens and improve the accuracy of the detection results.

[0019] like Figure 4 As shown, the laser emitting mechanism 4 includes a hinge support 41 fixedly mounted on the detection frame 3, on which a U-shaped frame 42 is rotatably mounted via a rotating shaft, and a straight line laser 43 connected by bolts is mounted on the U-shaped frame 42. The above-mentioned installation form can adjust the inclination angle of the straight line laser 43, so that it is convenient to debug with different inclination angles during the initial test, which reduces the difficulty of initial installation and debugging, and enables the debugging personnel to adjust the appropriate inclination angle according to actual conditions; wherein, a locking screw 44 is fixedly connected to the outer end of the rotating shaft, which passes through the hinge support 41 and is threadedly connected to a locking wheel 45 at the end. A rubber pad with a rough surface is fixedly attached to the inner side of the locking wheel 45. When the inclination angle of the straight line laser 43 needs to be fixed, the locking wheel 45 is tightened, and the inclination angle of the straight line laser 43 can be fixed by the friction between the locking wheel 44 and the U-shaped frame 42.

[0020] The first cleaning mechanism 6 includes an L-shaped plate 61 installed on the upper end surface of the line laser 43, and a first stepper motor 62 is installed therein. The output shaft of the first stepper motor 62 is fixedly connected to a three-leaf plate 63. The back of the three-leaf plate 63 is provided with a cleaning brush layer 64 that fits the lens of the line laser 43. When cleaning the lens of the line laser 43, the first stepper motor 62 drives the three-leaf plate 63 to rotate, thereby driving the cleaning brush layer 64 to brush the surface of the lens of the line laser 43 to complete the cleaning work; in addition, the area of ​​the through hole enclosed by the blades of the three-leaf plate 63 is numerically larger than the lens area of ​​the line laser 43, and when the through hole is facing the lens of the line laser 43, its lens projection range is within the range of the through hole. The above structural form can ensure that when detection is required, the strip laser emitted by the line laser 43 can completely pass through the three-leaf plate 63 without being blocked by it.

[0021] like Figure 4 As shown, the lens cover of the high-speed industrial camera 5 is provided with a transparent and colorless glass cover 51, and the upper end surface of the glass cover 51 is higher than the plane where the upper end surface of the lens barrel of the high-speed industrial camera 5 is located. The above-mentioned structural form can protect the lens of the high-speed industrial camera 5 with the glass cover 51 to prevent it from being scratched during cleaning. Among them, the high-speed industrial camera 5 can adopt a Hikvision industrial camera.

[0022] The second cleaning mechanism 7 includes an L-shaped plate 71 installed on both sides of the high-speed industrial camera 5, with a second stepper motor 72 installed therebetween. The output shaft of the second stepper motor 72 is fixedly connected to a scraper 73, and the back of the scraper 73 is provided with a cleaning scraping layer 74 that is in contact with the glass cover 51. When cleaning the lens of the high-speed industrial camera 5, the second stepper motor 72 drives the scraper 73 to rotate, thereby driving the cleaning scraping layer 74 to brush the surface of the glass cover 51 to complete the cleaning work; wherein, the second stepper motors 72 on both sides of the high-speed industrial camera 5 have the same speed and opposite directions, and the corresponding two scrapers 73 have the same initial direction. The above technical solution can ensure that the two scrapers 73 scrape alternately in opposite directions, thereby ensuring a better cleaning effect and a faster cleaning rate.

[0023] like Figure 2 As shown, the conveyor belt support 1 includes a pillar 11, a longitudinal beam 12 is fixedly provided on the top of the pillar, a plurality of cross beams 13 are arranged between the longitudinal beams 12, and side supports 14 are fixedly provided on both sides of the cross beams 13. The side supports 14 are provided with rotatably connected side rollers 15, which are in contact with the concave belt 2. The side rollers 15 provide rolling support for the concave belt 2, so that the concave belt 2 can move under the drive of the motor to convey materials.

[0024] In addition, a middle bracket 16 is fixedly provided in the middle of the crossbeam 13, and an auxiliary roller 17 is installed on the middle bracket 16 to be rotatably connected. When the concave belt 2 is lightly loaded, it does not contact the auxiliary roller 17. When the concave belt 2 is heavily loaded, it contacts the auxiliary roller 17. The above-mentioned structural form can play the role of auxiliary support through the auxiliary roller 17 when the concave belt 2 is heavily loaded, thereby avoiding serious deformation of the concave belt 2 and affecting the subsequent normal use.

[0025] The use principle and use process of the present invention: The belt load detection mechanism has a simple structure, low cost, and low installation accuracy requirements. The specific principle is that the laser emitting mechanisms 4 on both sides emit linear laser strips to illuminate the lower end surface of the concave belt 2. After refraction, the laser will be emitted to the high-speed industrial camera 5 and received by it. Under different load conditions, the position of the lower end surface of the concave belt 2 will also change accordingly, that is, as the load continues to increase, the lower end surface of the concave belt 2 will continue to move downward, which causes the laser entry point to change. Correspondingly, the landing point and entry angle of the laser on the high-speed industrial camera 5 will also change. Through the analysis of the incident laser information by the high-speed industrial camera 5, the current state of the concave belt 2 can be determined, and then the current load condition of the concave belt 2 can be determined, thereby realizing the detection of the load condition of the concave belt 2 and timely discovering when its load is too large.

[0026] In addition, the laser emitting mechanism 4 and the high-speed industrial camera 5 are correspondingly provided with a first cleaning mechanism 6 and a second cleaning mechanism 7, which can clean the dust at the lens and improve the accuracy of the detection results. Since the lens area of ​​the laser emitting mechanism 4 and the high-speed industrial camera 5 is not large, the cleaning difficulty is not great, so the first cleaning mechanism 6 and the second cleaning mechanism 7 can ensure the cleaning quality.

[0027] The specific working principle of the above-mentioned cleaning structure is as follows: when cleaning the lens of the line laser 43, the first stepper motor 62 works to drive the three-leaf plate 63 to rotate, thereby driving the cleaning brush layer 64 to brush the surface of the lens of the line laser 43 to complete the cleaning work; when cleaning the lens of the high-speed industrial camera 5, the second stepper motor 72 works to drive the scraper 73 to rotate, thereby driving the cleaning scraper layer 74 to brush the surface of the glass cover 51 to complete the cleaning work.

[0028] Finally, it should be noted that the above embodiments are merely examples for the purpose of illustrating the present invention and are not intended to limit the embodiments. Those skilled in the art will readily appreciate that other variations or modifications based on the above description are possible. It is not necessary and impossible to provide an exhaustive list of all embodiments. However, obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A light and heavy load detection mechanism for a coal conveyor belt, characterized in that: include: A grooved conveyor belt, which is composed of a conveyor belt support (1) and a concave belt (2), and the concave belt (2) is driven to move by a motor installed on the conveyor belt support (1). In addition, a plurality of detection frames (3) are installed on the conveyor belt support (1); A laser emitting mechanism (4) is symmetrically mounted on both sides of the detection frame (3) and is used to emit laser light to illuminate the lower end surface of the concave belt (2); A high-speed industrial camera (5) is installed in the middle of the detection frame (3) to receive the laser reflected by the concave belt (2); A first cleaning mechanism (6) is installed on the laser emitting mechanism (4) for cleaning the lens of the laser emitting mechanism (4), and second cleaning mechanisms (7) are installed on both sides of the high-speed industrial camera (5) for cleaning the lens of the high-speed industrial camera (5).

2. A light and heavy load detection mechanism for a coal conveyor belt according to claim 1, characterized in that: The laser emitting mechanism (4) comprises a hinge support (41) fixedly mounted on the detection frame (3), on which a rotatably connected U-shaped frame (42) is mounted via a rotating shaft, and a straight-line laser (43) connected by bolts is mounted on the U-shaped frame (42).

3. A light and heavy load detection mechanism for a coal conveyor belt according to claim 2, characterized in that: A locking screw (44) is fixedly connected to the outer end of the rotating shaft and passes through the hinge support (41). A locking wheel (45) is threadedly connected to the end thereof. A rubber pad with a rough surface is fixedly attached to the inner side of the locking wheel (45).

4. A coal conveyor belt light and heavy load detection mechanism according to claim 1, characterized in that: The lens upper cover of the high-speed industrial camera (5) is provided with a transparent colorless glass cover plate (51), and the upper end surface of the glass cover plate (51) is higher than the plane where the upper end surface of the lens barrel of the high-speed industrial camera (5) is located.

5. A coal conveyor belt light and heavy load detection mechanism according to claim 2, characterized in that: The first cleaning mechanism (6) comprises an L-shaped plate (61) mounted on the upper end surface of the line laser (43), with a first stepper motor (62) mounted therebetween, the output shaft of the first stepper motor (62) being fixedly connected to a three-leaf plate (63), and a cleaning brush layer (64) that is in contact with a lens of the line laser (43) being attached to the back of the three-leaf plate (63).

6. A light or heavy load detection mechanism for a coal conveyor belt according to claim 5, characterized in that: The area of ​​the through hole formed between the blades of the three-leaf plate (63) is numerically larger than the lens area of ​​the line laser (43), and when the through hole faces the lens of the line laser (43), the projection range of the lens is within the range of the through hole.

7. A light or heavy load detection mechanism for a coal conveyor belt according to claim 4, characterized in that: The second cleaning mechanism (7) comprises two L-shaped plates (71) mounted on both sides of the high-speed industrial camera (5), with a second stepper motor (72) mounted therebetween, the output shaft of the second stepper motor (72) being fixedly connected to a scraper (73), the back of the scraper (73) being provided with a cleaning scraping layer (74) that is in contact with the glass cover plate (51).

8. A light or heavy load detection mechanism for a coal conveyor belt according to claim 7, characterized in that: The second stepper motors (72) on both sides of the high-speed industrial camera (5) have the same rotation speed and opposite rotation directions, and the corresponding two scrapers (73) have the same initial orientation.

9. A coal conveyor belt light and heavy load detection mechanism according to claim 1, characterized in that: The conveyor belt support (1) comprises a support column (11), a longitudinal beam (12) being fixedly arranged at the top end thereof, a plurality of cross beams (13) being arranged between the longitudinal beams (12), side supports (14) being fixedly arranged on both sides of the cross beams (13), and rotatably connected side rollers (15) being mounted on the side supports (14) and contacting the concave belt (2).

10. A coal conveyor belt light and heavy load detection mechanism according to claim 9, characterized in that: A middle bracket (16) is fixedly arranged in the middle of the crossbeam (13), and a rotatably connected auxiliary roller (17) is mounted on the middle bracket (16). When the concave belt (2) is lightly loaded, the middle bracket does not contact the auxiliary roller (17), and when the concave belt (2) is heavily loaded, the middle bracket contacts the auxiliary roller (17).

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