Coal quality on-line detection system for power plant

Abstract

The invention discloses a coal quality on-line detection system for a power plant, and belongs to the technical field of coal quality detection.The coal quality on-line detection system comprises a conveying belt used for conveying coal, a fixing frame is fixedly installed above a frame body of the conveying belt, a detector is fixedly installed on the fixing frame in a penetrating mode, and the detector and the conveying belt are correspondingly arranged up and down; the driving assembly is mounted on the upper surface of the fixing frame; the pressing assembly is arranged on the inner side of the fixing frame, and the pressing assembly is driven by the driving assembly to flatten the coal; the leveling assembly is movably mounted on the lower surface of the fixing frame; the cleaning assembly is arranged on the lower surface of the fixing frame, and the cleaning assembly is arranged on the outer side of the lower end of the detector. According to the coal quality online detection system for the power plant, conveyed coal can be automatically leveled in the detection process, the detection precision is prevented from being influenced by the detection height difference, the detector lens can be automatically cleaned in the detection process, and the detection precision is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of coal quality detection, and in particular to an online coal quality detection system for a power plant. Background Art

[0002] Most power plants still use combustion to generate electricity, so a large amount of coal needs to be burned during the power generation process. In order to improve power generation efficiency, the quality of fuel coal needs to be guaranteed. Therefore, an online coal quality detection system is needed to perform real-time detection of the coal being transported. However, the existing online coal quality detection system is unable to level the coal being transported during actual use, resulting in errors in the detection distance, which in turn affects the detection accuracy.

[0003] Prior art (application number: CN202210186572.8, Chinese patent application date: February 28, 2022) discloses an online detection system and method based on laser multi-energy spectroscopy. This system addresses the problems of laser elemental analysis technology that cannot be directly applied to conveyor belt material detection and poor detection accuracy. The system includes a laser detection module disposed above a feeding mechanism, a material shaping device mounted on the feeding mechanism, a distance measurement module disposed between the laser detection module and the material shaping device, an adjustment module connected to the distance measurement module, and a data analysis module. The present invention has the advantages of high detection accuracy and real-time online detection. The prior art (application number: CN202311389404.X, Chinese patent application date: 2023-10-25) discloses a real-time coal quality analysis device based on laser multi-energy spectrum detection. The first distance measuring component measures the average thickness and changes of coal particles conveyed on the belt conveyor, and then feeds back the signal to the control module. The control module controls the leveling mechanism and the compacting mechanism to rise and fall to a height position corresponding to the measured average thickness, thereby causing the leveling mechanism to scrape and level the coal particles on the conveyor belt. At the same time, the control module controls the compacting mechanism to compact the leveled coal particles. The second distance measuring component measures the thickness and changes of the compacted coal particles, and then feeds back the signal to the control module. The control module controls the detection mechanism to rise and fall to a height position corresponding to the measured thickness to perform real-time detection of the coal particles, and transmits the detection signal to the laser multi-energy spectrum analyzer for coal quality analysis. Thus, the device can perform real-time, online, and accurate coal quality component content detection and analysis on the coal on the conveyor line. Although the existing online coal quality detection system can achieve coal leveling, the coal blocks will be moved during the leveling process, causing some coal powder to float and adhere to the lens of the detection device, thereby affecting the detection accuracy of subsequent equipment and having certain usage defects. Summary of the Invention

[0004] The purpose of the present invention is to provide an online coal quality detection system for power plants to solve the problem raised in the above background technology that the online coal quality detection system on the market currently will move the coal blocks during the leveling process, causing some coal powder to float easily and adhere to the lens of the detection device, thereby affecting the detection accuracy of subsequent equipment.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: an online coal quality detection system for a power plant, comprising a conveyor belt for conveying coal, a fixed frame fixedly mounted above the frame of the conveyor belt, and a detector fixedly mounted through the fixed frame, and the detector and the conveyor belt are arranged in correspondence with each other above and below; Also included are: a drive assembly mounted on the upper surface of the fixing frame; A pressing assembly is arranged on the inner side of the fixing frame, and the pressing assembly is driven by the driving assembly to flatten the coal; The leveling assembly is movably mounted on the lower surface of the fixed frame and is used to achieve preliminary leveling of the coal on the conveyor belt; The cleaning component is arranged on the lower surface of the fixing frame. The cleaning component is arranged on the outer side of the lower end of the detector, and the cleaning component automatically cleans the detector lens by blowing air.

[0006] Preferably, the driving assembly includes a fixing seat fixedly mounted on the upper surface of the fixing frame, and a motor is fixedly mounted on the outer side of the fixing seat, and the output end of the motor is fixedly connected to a half gear, and at the same time, a linkage is set for lifting on the inner side of the fixing seat, and tooth blocks are evenly fixed on the front and rear inner walls of the linkage, and the half gear and the tooth blocks on both sides of the linkage are alternately engaged to drive the linkage to perform reciprocating lifting and lowering adjustment.

[0007] By adopting the above technical solution, after the motor is started, the linkage can be driven to perform reciprocating lifting and lowering adjustment through the meshing action of the half gears.

[0008] Preferably, the pressing assembly includes a telescopic rod fixedly mounted on the lower end of the linkage member, and the telescopic rod passes through the upper end of the fixed frame and is connected to the fixed frame for lifting and lowering, and the lower end of the telescopic rod is fixedly connected to a leveling plate, and the coal transported on the conveyor belt is flattened during the downward movement of the leveling plate.

[0009] By adopting the above technical solution, when the telescopic rod drives the leveling plate to move up and down, the leveling plate can flatten the coal transported thereunder, thereby improving the subsequent detection accuracy.

[0010] Preferably, the leveling assembly includes a rotating shaft rotatably mounted on the inner side of the fixed frame, and a shifting rod is fixedly connected to the lower end of the rotating shaft, and the transported coal is leveled during the rotation of the shifting rod, and the rotating shaft and the leveling plate are connected by a transmission assembly.

[0011] By adopting the above technical solution, the transmission assembly can drive the rotating shaft to rotate synchronously during the lifting and lowering of the leveling plate, so that the shifting rod at the lower end of the rotating shaft can scatter and level the coal.

[0012] Preferably, the transmission assembly includes a bracket fixedly installed on the outside of the leveling plate and a fixed sleeve fixedly mounted on the outside of the rotating shaft, and the fixed sleeve passes through the bracket and forms a lifting structure with the bracket, and a spiral guide groove is provided on the outer wall of the fixed sleeve, and a ball is embedded in the inner wall of the bracket, and the ball rolls along the guide groove.

[0013] By adopting the above technical solution, when the leveling plate drives the bracket to be raised or lowered, the balls on the inside of the bracket will slide along the guide groove, thereby driving the fixed sleeve and the rotating shaft to rotate, thereby achieving a preliminary leveling operation.

[0014] Preferably, the trough bodies opened on both sides of the leveling plate are symmetrically and telescopically connected with telescopic plates, and springs are connected between the telescopic plates and the leveling plate, and bristles are fixedly provided on the lower surface of the telescopic plates. At the same time, the telescopic plates contact the inclined surface of the conveyor belt during the downward movement and are telescopically adjusted with the leveling plate.

[0015] By adopting the above technical solution, the telescopic plate can be telescoped after contacting the conveyor belt during the downward movement of the leveling plate, and the bristles can be used to sweep the coal powder attached to the edge of the conveyor belt for easy collection.

[0016] Preferably, an airbag is fixedly bonded between the leveling plate and the telescopic plate, and an air intake pipe and an air supply pipe are connected to the outside of the airbag, and a filter structure is provided at the pipe mouth of the air intake pipe, and a one-way valve structure is provided on both the air intake pipe and the air supply pipe.

[0017] By adopting the above technical solution, the telescopic plate can be adjusted to expand and contract, and the telescopic plate can squeeze and stretch the airbag, so that the airbag can inhale air through the air inlet pipe and transport the gas through the air delivery pipe.

[0018] Preferably, the cleaning assembly includes a fixed ring fixedly mounted on the lower surface of the upper end of the fixed frame, and the fixed ring and the lower end of the detector are coaxially arranged, and a movable ring is elastically rotatably mounted on the inner side of the fixed ring, and at the same time, the space between the fixed ring and the movable ring is connected to the air pipe, and the inner wall of the movable ring is evenly fixedly connected with a cleaning nozzle, and the air outlet port of the cleaning nozzle faces the lens of the detector.

[0019] By adopting the above technical solution, when the airbag is squeezed, it can transport the gas inside to the cleaning nozzle through the air pipe, and blow air toward the lens of the detector through the cleaning nozzle to achieve automatic cleaning.

[0020] Preferably, a pull rope is wound around the outer side of the movable ring, and the lower end of the pull rope is fixedly connected to the upper surface of the leveling plate.

[0021] By adopting the above technical solution, when the leveling plate is raised or lowered, the leveling plate can be elastically rotated by driving the movable ring through the pull rope, thereby improving the air blowing cleaning effect of the cleaning nozzle outside the movable ring.

[0022] Compared with the prior art, the present invention has the following advantages: the online coal quality detection system for power plants can automatically level the conveyed coal during the detection process, avoiding the impact of detection accuracy due to detection height differences, and can automatically clean the detector lens during the detection process, further improving detection accuracy. The specific details are as follows; 1. A linkage, telescopic rod and leveling plate are provided. When the conveyor belt is conveying coal, the motor is started to drive the half gear to rotate, so that the half gear drives the linkage to move up and down through meshing. At this time, the linkage can pull the leveling plate to move up and down through the telescopic rod, thereby achieving the goal of leveling the coal. 2. A leveling plate and a lever are provided. As the leveling plate moves back and forth, the bracket outside the leveling plate can be adjusted up and down along the rotating shaft. At this time, the balls on the inner wall of the bracket will roll along the guide groove, thereby driving the rotating shaft to rotate back and forth, so that the lever at the lower end of the rotating shaft can spread and level the coal; 3. An air bag and a movable ring are provided. As the leveling plate moves downward, the telescopic plate will be telescopically adjusted with the leveling plate under the resistance of the conveyor belt, so that the telescopic plate can use the bristles to clean the coal powder on the edge of the conveyor belt. At the same time, the telescopic plate can cooperate with the leveling plate to squeeze and stretch the air bag, so that the air bag can inhale air through the air inlet pipe and transmit the gas to the cleaning nozzle on the movable ring through the air pipe, so that the cleaning nozzle can automatically blow air to clean the lens of the detector during the rotation of the movable ring, thereby ensuring the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a rear view structural diagram of the present invention; Figure 3 It is a schematic diagram of the cross-sectional structure of the present invention; Figure 4 This is a schematic diagram of the connection structure between the fixing seat and the linkage member of the present invention; Figure 5 This is a schematic diagram of the connection structure between the leveling plate and the rotating shaft of the present invention; Figure 6 This is a schematic diagram of the cross-sectional structure of the bracket of the present invention; Figure 7 For the present invention Figure 6 A in the middle is an enlarged structural diagram; Figure 8 This is a schematic diagram of the airbag installation structure of the present invention; Figure 9 This is a schematic cross-sectional view of the fixed ring and the movable ring of the present invention; Figure 10 For the present invention Figure 9 Enlarged structural diagram at point B in the middle.

[0024] In the figure: 1. Conveyor belt; 2. Fixed frame; 3. Detector; 4. Fixed seat; 5. Motor; 6. Half gear; 7. Linkage; 8. Telescopic rod; 9. Leveling plate; 10. Bracket; 1001. Ball bearing; 11. Rotating shaft; 12. Push rod; 13. Fixed sleeve; 1301. Guide groove; 14. Telescopic plate; 15. Spring; 16. Air bag; 17. Inlet pipe; 18. Air delivery pipe; 19. Fixed ring; 20. Movable ring; 21. Cleaning nozzle; 22. Pull rope. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] Example 1: Please refer to Figure 1-Figure 7 As shown, the existing coal quality online detection system is inconvenient to level the conveyed coal during the detection process, resulting in differences in the distance between the detection area and the lens, thereby reducing the detection accuracy. To solve this technical problem, this embodiment discloses the following technical content; An online coal quality detection system for a power plant includes a conveyor belt 1 for conveying coal, a fixed frame 2 is fixedly installed above the frame of the conveyor belt 1, and a detector 3 is fixedly installed through the fixed frame 2, and the detector 3 and the conveyor belt 1 are arranged in a corresponding manner above and below; It also includes: a driving assembly, mounted on the upper surface of the fixing frame 2; The pressing assembly is arranged on the inner side of the fixing frame 2, and the pressing assembly is driven by the driving assembly to flatten the coal; The leveling assembly is movably mounted on the lower surface of the fixed frame 2 and is used to achieve preliminary leveling of the coal on the conveyor belt 1; The driving assembly includes a fixing base 4 fixedly mounted on the upper surface of the fixing frame 2, and a motor 5 is fixedly mounted on the outside of the fixing base 4, and the output end of the motor 5 is fixedly connected to a half gear 6. At the same time, a linkage member 7 is set for lifting on the inner side of the fixing base 4, and tooth blocks are evenly fixed on the inner walls of the front and rear sides of the linkage member 7. The half gear 6 and the tooth blocks on both sides of the linkage member 7 are alternately engaged to drive the linkage member 7 to perform reciprocating lifting and lowering adjustment.

[0027] The pressing assembly includes a telescopic rod 8 fixedly mounted on the lower end of the linkage member 7, and the telescopic rod 8 passes through the upper end of the fixed frame 2 and is connected to the fixed frame 2 for lifting and lowering, and the lower end of the telescopic rod 8 is fixedly connected to a leveling plate 9, and the leveling plate 9 flattens the coal transported on the conveyor belt 1 during the downward movement.

[0028] The leveling assembly includes a rotating shaft 11 rotatably mounted on the inner side of the fixed frame 2, and a shifting rod 12 is fixedly connected to the lower end of the rotating shaft 11. The shifting rod 12 levels the transported coal during its rotation. At the same time, the rotating shaft 11 and the leveling plate 9 are connected by a transmission assembly.

[0029] The transmission assembly includes a bracket 10 fixedly installed on the outside of the leveling plate 9 and a fixed sleeve 13 fixedly sleeved on the outside of the rotating shaft 11. The fixed sleeve 13 passes through the bracket 10 and forms a lifting structure with the bracket 10. The outer wall of the fixed sleeve 13 is provided with a spiral guide groove 1301. At the same time, the inner wall of the bracket 10 is embedded with a ball 1001, and the ball 1001 rolls along the guide groove 1301.

[0030] The troughs opened on both sides of the leveling plate 9 are symmetrically and telescopically connected with telescopic plates 14, and springs 15 are connected between the telescopic plates 14 and the leveling plate 9, and bristles are fixedly provided on the lower surface of the telescopic plates 14. At the same time, the telescopic plates 14 contact the inclined surface of the conveyor belt 1 during the downward movement and then perform telescopic adjustment with the leveling plate 9.

[0031] By adopting the above technical solution, when the coal is transported by the conveyor belt 1, the detector 3 and the motor 5 are started. At this time, the motor 5 can drive the half gear 6 to rotate, so that the half gear 6 can mesh with the tooth block inside the linkage member 7, and can drive the linkage member 7 to drive the telescopic rod 8 to perform telescopic adjustment. At this time, the telescopic rod 8 can drive the leveling plate 9 to perform reciprocating lifting and lowering adjustment, so that the leveling plate 9 can flatten the transported coal. At the same time, the bracket 10 on the leveling plate 9 will reciprocate and lift on the outside of the fixed sleeve 13. The balls 1001 on the bracket 10 roll along the spiral guide groove 1301 provided on the outer wall of the fixed sleeve 13, thereby driving the fixed sleeve 13 and the rotating shaft 11 to rotate back and forth. At this time, the lever 12 at the lower end of the rotating shaft 11 can disperse and level the coal pile being transported, facilitating the subsequent flattening operation. At the same time, when the flattening plate 9 moves downward, the telescopic plate 14 elastically extends and contracts under the resistance of the conveyor belt 1. At this time, the bristles on the outer side of the telescopic plate 14 can sweep and collect the coal powder on the edge of the conveyor belt 1. Example 2: The technical content disclosed in this embodiment is a further improvement based on the above-mentioned Example 1. The existing coal quality online detection system is inconvenient to automatically clean the detection lens during use, which affects the subsequent detection accuracy. In order to further solve this technical problem, this embodiment discloses the following technical content, such as Figure 3 and Figures 8-10 As shown; The cleaning component is arranged on the lower surface of the fixing frame 2, and the cleaning component is arranged on the outer side of the lower end of the detector 3. The cleaning component automatically cleans the lens of the detector 3 by blowing air.

[0032] An airbag 16 is fixedly bonded between the leveling plate 9 and the telescopic plate 14, and the outside of the airbag 16 is connected to an air intake pipe 17 and an air delivery pipe 18, and the pipe mouth of the air intake pipe 17 is provided with a filter structure, and both the air intake pipe 17 and the air delivery pipe 18 are provided with a one-way valve structure.

[0033] The cleaning assembly includes a fixed ring 19 fixedly mounted on the lower surface of the upper end of the fixed frame 2, and the fixed ring 19 and the lower end of the detector 3 are coaxially arranged, and a movable ring 20 is elastically rotatably mounted on the inner side of the fixed ring 19. At the same time, the space between the fixed ring 19 and the movable ring 20 is connected to the air supply pipe 18, and the inner wall of the movable ring 20 is evenly fixedly connected with a cleaning nozzle 21, and the air outlet port of the cleaning nozzle 21 faces the lens of the detector 3.

[0034] A pull rope 22 is wound around the outer side of the movable ring 20 , and the lower end of the pull rope 22 is fixedly connected to the upper surface of the leveling plate 9 .

[0035] Through the above technical solution, as the leveling plate 9 is raised and lowered, the telescopic plate 14 will be elastically telescopically adjusted, so that the telescopic plate 14 can squeeze and stretch the airbag 16, so that the airbag 16 can inhale filtered air through the air inlet pipe 17 during the stretching process, and when the airbag 16 is pressurized, the airbag 16 can transport the internal gas through the air supply pipe 18. At this time, the air supply pipe 18 can transport the gas to between the fixed ring 19 and the movable ring 20, so that the gas is subsequently sprayed to the outside of the lens of the detector 3 through the cleaning nozzle 21. At the same time, during the raising and lowering process of the leveling plate 9, the movable ring 20 will be pulled by the pull rope 22 to rotate elastically, so that the cleaning nozzle 21 outside the movable ring 20 rotates and blows air, thereby further improving the automatic cleaning of the lens of the detector 3 and avoiding affecting the detection accuracy of the detector 3.

[0036] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0037] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An online coal quality detection system for a power plant, comprising a conveyor belt (1) for conveying coal, a fixed frame (2) being fixedly mounted above the frame of the conveyor belt (1), a detector (3) being fixedly mounted through the fixed frame (2), and the detector (3) and the conveyor belt (1) being arranged correspondingly up and down; It is characterized in that Also includes: A drive assembly mounted on the upper surface of the fixing frame (2); A pressing assembly is arranged on the inner side of the fixing frame (2), and the pressing assembly is driven by the driving assembly to flatten the coal; A leveling component, movably mounted on the lower surface of the fixed frame (2), used to achieve preliminary leveling of the coal on the conveyor belt (1); A cleaning component is arranged on the lower surface of the fixing frame (2), the cleaning component is arranged on the outer side of the lower end of the detector (3), and the cleaning component automatically cleans the lens of the detector (3) by blowing air.

2. The on-line coal quality detection system for power plants according to claim 1 is characterized in that: The driving assembly comprises a fixing seat (4) fixedly mounted on the upper surface of the fixing frame (2), a motor (5) fixedly mounted on the outer side of the fixing seat (4), and a half gear (6) fixedly connected to the output end of the motor (5), and a linkage member (7) is provided on the inner side of the fixing seat (4) for lifting, and gear blocks are evenly fixedly provided on the inner walls of the front and rear sides of the linkage member (7), and the half gear (6) and the gear blocks on both sides of the linkage member (7) are alternately meshed to drive the linkage member (7) to perform reciprocating lifting and lowering adjustment.

3. The on-line coal quality detection system for power plants according to claim 2 is characterized in that: The pressing assembly comprises a telescopic rod (8) fixedly mounted on the lower end of the linkage member (7), the telescopic rod (8) passing through the upper end of the fixed frame (2) and being connected to the fixed frame (2) in a lifting manner, and a flattening plate (9) is fixedly connected to the lower end of the telescopic rod (8), and the flattening plate (9) flattens the coal transported on the conveyor belt (1) during its downward movement.

4. The on-line coal quality detection system for power plants according to claim 3 is characterized in that: The leveling assembly comprises a rotating shaft (11) rotatably mounted on the inner side of a fixed frame (2), and a shifting rod (12) is fixedly connected to the lower end of the rotating shaft (11), and the conveyed coal is leveled during the rotation of the shifting rod (12), and the rotating shaft (11) and the leveling plate (9) are connected via a transmission assembly.

5. The on-line coal quality detection system for power plants according to claim 4 is characterized in that: The transmission assembly comprises a bracket (10) fixedly mounted on the outside of the leveling plate (9) and a fixed sleeve (13) fixedly sleeved on the outside of the rotating shaft (11), wherein the fixed sleeve (13) passes through the bracket (10) and forms a lifting structure with the bracket (10), and a spiral guide groove (1301) is formed on the outer wall of the fixed sleeve (13), and a ball (1001) is embedded and mounted on the inner wall of the bracket (10), and the ball (1001) rolls along the guide groove (1301).

6. The on-line coal quality detection system for power plants according to claim 3 is characterized by: The trough bodies opened on both sides of the leveling plate (9) are symmetrically and telescopically connected with telescopic plates (14), and a spring (15) is connected between the telescopic plates (14) and the leveling plate (9), and bristles are fixedly provided on the lower surface of the telescopic plates (14). At the same time, when the telescopic plates (14) move downward, they contact the inclined surface of the conveyor belt (1) and are telescopically adjusted with the leveling plate (9).

7. The on-line coal quality detection system for power plants according to claim 6, characterized in that: An air bag (16) is fixedly bonded between the leveling plate (9) and the telescopic plate (14), and an air intake pipe (17) and an air delivery pipe (18) are connected to the outside of the air bag (16). A filter structure is provided at the pipe opening of the air intake pipe (17), and both the air intake pipe (17) and the air delivery pipe (18) are provided with a one-way valve structure.

8. The on-line coal quality detection system for power plants according to claim 1 is characterized by: The cleaning assembly comprises a fixed ring (19) fixedly mounted on the lower surface of the upper end of the fixing frame (2), and the fixed ring (19) and the lower end of the detector (3) are coaxially arranged, and a movable ring (20) is elastically rotatably mounted on the inner side of the fixed ring (19), and the space between the fixed ring (19) and the movable ring (20) is connected to the air supply pipe (18), and a cleaning nozzle (21) is evenly fixedly connected to the inner wall of the movable ring (20), and the air outlet port of the cleaning nozzle (21) faces the lens of the detector (3).

9. The on-line coal quality detection system for power plants according to claim 8, characterized in that: A pull rope (22) is wound around the outer side of the movable ring (20), and the lower end of the pull rope (22) is fixedly connected to the upper surface of the leveling plate (9).

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