Anti-deviation device for coal conveying belt of thermal power plant

Abstract

The utility model provides a coal conveying belt anti-deviation device of a thermal power plant, which relates to the field of coal conveying belts and comprises a supporting rack, a coal conveying belt, a carrier roller support and a conveying carrier roller, the carrier roller support and the conveying carrier roller are symmetrically arranged, the conveying carrier roller comprises a boss portion and a transmission portion, and the diameter of the boss portion is larger than that of the transmission portion. The bottom of the coal conveying belt is tightly attached to the outer side of the transmission part to convey coal briquettes, a stop lever for limiting the coal conveying belt is installed above the carrier roller support, and the two ends of the coal conveying belt can be clamped above the transmission part through the conveying carrier rollers which are different in diameter and are in a step shape. The boss parts can limit the positions of the two ends of the coal conveying belt in time, meanwhile, the stop levers can limit the upward moving positions of the two ends of the coal conveying belt, and therefore the phenomenon that the belt deviates due to the fact that coal particles and pulverized coal adhere to the conveying carrier rollers to generate local protrusions can be prevented.

Description

Technical Field

[0001] This utility model relates to the field of coal conveyor belt technology, specifically to a coal conveyor belt anti-deviation device for thermal power plants. Background Technology

[0002] Coal conveying equipment refers to devices used to transport coal. The transportation methods include belt conveying, pneumatic conveying, and pipeline conveying, among which belt conveying is the most widely used.

[0003] During the coal conveying process, coal particles and coal dust easily adhere to the surface of the drums or idlers, forming local protrusions. This causes different running resistance on both sides of the belt, resulting in belt misalignment. Belt misalignment can lead to coal spillage, belt edge tearing, accelerated equipment wear, and even shutdown accidents. Currently, the most common way to deal with coal conveying belt misalignment is to add vertical guide drums on both sides of the conveying belt. However, the number of guide drums is far less than the number of conveying idlers, making it impossible to guide the misaligned conveying belt in a timely manner. If a large number of guide drums are used, it will greatly increase the operating cost. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a device for preventing belt misalignment in coal conveyors of thermal power plants. By using stepped conveyor rollers of different diameters, the two ends of the coal conveyor belt can be engaged above the transmission unit. When the coal conveyor belt initially deviates, the protrusions can promptly limit the position of the two ends of the conveyor belt. At the same time, the baffles can limit the upward movement of the two ends of the conveyor belt, thereby preventing coal particles and coal powder from adhering to the conveyor rollers and causing local protrusions that lead to belt misalignment. This solves the problems mentioned in the background art.

[0005] Technical solution

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a coal conveyor belt anti-deviation device for a thermal power plant, comprising a support frame, a coal conveyor belt, and symmetrically arranged idler supports and conveying idlers. The conveying idler includes a boss part and a transmission part, the diameter of the boss part being larger than the diameter of the transmission part. The bottom of the coal conveyor belt is close to the outside of the transmission part to convey coal blocks. A stop bar for limiting the movement of the coal conveyor belt is installed above the idler support.

[0007] Furthermore, the lower surface of the stop bar is arc-shaped, the stop bar is parallel to the boss and the length of the stop bar is greater than the width of the boss, and the bottom of the stop bar is close to the boss but does not contact the boss.

[0008] Furthermore, the gap between the lower surface of the stop bar and the top of the boss is smaller than the thickness of the coal conveyor belt.

[0009] Furthermore, a cleaning assembly for scraping off coal lumps adhering to the transmission unit is installed on the idler roller support. The cleaning assembly includes a scraper that is adapted to the tilt angle of the transmission unit and can be elastically extended and retracted, and a support plate that supports the scraper. The top of the scraper abuts against the transmission unit, and the bottom of the scraper is slidably connected to the inner side of the support plate. One end of the support plate is fixedly installed on the outer side of the idler roller support.

[0010] Furthermore, the top section of the scraper is an arc-shaped sharp angle that deviates from the center of the scraper and has a sharp tip. The direction of deviation of the arc-shaped sharp angle at the top of the scraper from the center of the scraper is opposite to the rotation direction of the transmission part.

[0011] Furthermore, several springs are installed on the inner side of the support plate to push the scraper upward and slide back to its original position.

[0012] The beneficial effects of this utility model are as follows:

[0013] By using stepped conveyor rollers of varying diameters, the two ends of the coal conveyor belt can be engaged above the drive unit. Even without using side guide rollers or with minimal use of them, the protrusions can promptly limit the position of both ends of the conveyor belt when initial deviation occurs. Simultaneously, the stop bars limit the upward movement of both ends of the conveyor belt, preventing coal particles and powder from adhering to the conveyor rollers and causing localized protrusions that could lead to belt misalignment. This saves on equipment operating costs. Furthermore, the scraper removes coal particles and powder adhering to the drive unit during the rotation of the conveyor rollers, preventing residual coal particles and powder from continuously affecting the stability of the conveyor belt and ensuring smooth operation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram showing the positions of the idler bracket and the conveying idler on the support frame of this utility model;

[0016] Figure 3 This is a schematic diagram of the conveyor roller structure of this utility model;

[0017] Figure 4 This is a schematic diagram of the cleaning component structure of this utility model.

[0018] Among them, 1. Support frame; 2. Coal conveyor belt; 3. Idler support; 4. Conveying idler; 401. Boss part; 402. Transmission part; 5. Stop bar; 6. Cleaning assembly; 601. Scraper; 602. Support plate; 603. Spring. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] See Figures 1-4 A device for preventing belt misalignment in a coal conveyor belt of a thermal power plant includes a support frame 1, a coal conveyor belt 2, and symmetrically arranged idler brackets 3 and conveying idlers 4. The conveying idlers 4 are divided into a boss part 401 and a transmission part 402. The diameter of the boss part 401 is larger than the diameter of the transmission part 402. The bottom of the coal conveyor belt 2 is close to the outside of the transmission part 402 to convey coal blocks. A stop bar 5 for limiting the movement of the coal conveyor belt 2 is installed above the idler brackets 3.

[0021] In this solution: During long-term operation of the coal conveyor belt 2, coal particles or coal dust easily adhere to the conveyor idlers 4, forming local protrusions. These protrusions cause different running resistance on both sides of the belt, resulting in belt misalignment. Currently, the common method to address belt misalignment is to add vertical guide rollers to both sides of the belt. However, the number of guide rollers is far less than the number of conveyor idlers 4, making it impossible to guide the misaligned belt in a timely manner. Using a large number of guide rollers would significantly increase operating costs. By configuring the conveyor idlers 4 with protrusions 401 and transmission parts 402 of different diameters, the transmission parts 402 are responsible for driving the coal conveyor belt 2, while the protrusions 401 can provide support to the belt at both ends. The blocking mechanism is designed to prevent belt deviation. In actual production, the conveyor rollers 4 are densely packed below the coal conveyor belt 2, and the protrusions 401 are close to both ends of the coal conveyor belt 2. This can limit the position of the coal conveyor belt 2 when it initially starts to deviate, preventing displacement of the coal conveyor belt 2 and avoiding belt deviation caused by different running resistance on both sides of the coal conveyor belt 2. The stop rod 5 can limit the upper position of the coal conveyor belt 2 when it slides upward on both sides, thus preventing belt deviation caused by the coal conveyor belt 2 being lifted upward and then sliding on the protrusions 401. At the same time, the cooperation between the protrusions 401 and the stop rod 5 can also prevent belt deviation caused by reasons such as the coal block falling at an incorrect point on the coal conveyor belt 2 or the center of gravity shifting to one side of the coal conveyor belt 2.

[0022] The lower surface of the stop bar 5 is arc-shaped. The stop bar 5 is parallel to the boss part 401 and the length of the stop bar 5 is greater than the width of the boss part 401. The bottom of the stop bar 5 is close to the boss part 401 but does not contact the boss part 401.

[0023] In this embodiment: the stop bar 5 with a lower arc-shaped surface can reduce the friction on the coal conveyor belt 2 when it deviates upward, and reduce the wear of the coal conveyor belt 2. The stop bar 5 is parallel to the boss part 401 and its length is longer than the width of the boss part 401, so that the stop bar 5 can limit the height of both ends of the coal conveyor belt 2, and prevent the belt from running off-center due to the upward slippage of both ends of the coal conveyor belt 2 caused by the protrusion formed by coal particles and coal powder or other reasons. The bottom of the stop bar 5 does not contact the boss part 401, which can avoid friction between the stop bar 5 and the boss part 401, thereby avoiding affecting the transmission efficiency of the boss part 401 and the transmission part 402.

[0024] The gap between the lower surface of the stop bar 5 and the top of the boss 401 is smaller than the thickness of the coal conveyor belt 2.

[0025] In this embodiment, the gap between the stop bar 5 and the boss part 401 is small, which can prevent the two ends of the coal conveyor belt 2 from being lifted upward and stuck between the stop bar 5 and the boss part 401, and prevent the coal conveyor belt 2 from being stuck between the stop bar 5 and the boss part 401 and causing abnormal wear.

[0026] The idler roller bracket 3 is equipped with a cleaning component 6 for scraping off coal lumps adhering to the transmission part 402. The cleaning component 6 includes a scraper 601 that is adapted to the tilt angle of the transmission part 402 and can be elastically extended and retracted, and a support plate 602 that supports the scraper 601. The top of the scraper 601 abuts against the transmission part 402, and the bottom of the scraper 601 is slidably connected to the inner side of the support plate 602. One end of the support plate 602 is fixedly installed on the outer side of the idler roller bracket 3.

[0027] In this embodiment: during the rotation of the conveying roller 4, the scraper 601 abuts against the transmission part 402 and slides on the transmission part 402, which can scrape off the coal particles and coal powder adhering to the transmission part 402, reduce the accumulation of coal particles or coal powder on the transmission part 402, keep the transmission part 402 clean, avoid the formation of obvious protrusions of coal particles and coal powder on the transmission part 402, which would cause the coal conveying belt 2 to run off-center, and maintain the stable operation of the coal conveying belt 2.

[0028] The top section of the scraper 601 is an arc-shaped sharp corner that is off-center from the center of the scraper 601. The direction of the arc-shaped sharp corner at the top of the scraper 601 is opposite to the direction of rotation of the transmission part 402.

[0029] In this embodiment, the scraper 601 with an arc-shaped tip can contact the transmission part 402 with a smaller area, reducing the friction between the scraper 601 and the transmission part 402, thereby reducing the resistance of the scraper 601 to the transmission part 402. Since the direction of the arc-shaped tip of the scraper 601 at the center of the scraper 601 is opposite to the rotation direction of the transmission part 402, the included angle between the scraper 601 and the transmission part 402 is small. The scraper 601 can clean coal particles and coal dust at a better force position. At the same time, the arc-shaped tip can scrape off the coal particles and coal dust adhering to the transmission part 402 against the rotation direction of the transmission part 402, improving the cleaning effect of the scraper 601 on the transmission part 402.

[0030] Several springs 603 are installed on the inner side of the support plate 602 to push the scraper 601 to slide upward and reset.

[0031] In this embodiment, the spring 603 can push the scraper 601 to contact the transmission part 402 with stable pressure. When the tip of the scraper 601 is worn, the spring 603 can push the scraper 601 upward, thereby keeping the scraper 601 in continuous contact with the transmission part 402 for cleaning.

[0032] It should be noted that in this document, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A device for preventing belt misalignment in a coal conveyor belt of a thermal power plant, comprising a support frame (1), a coal conveyor belt (2), and symmetrically arranged idler brackets (3) and conveying idlers (4), characterized in that: The conveying idler (4) is divided into a boss part (401) and a transmission part (402). The diameter of the boss part (401) is larger than the diameter of the transmission part (402). The bottom of the coal conveying belt (2) is attached to the outside of the transmission part (402) to convey coal blocks. A stop bar (5) for limiting the coal conveying belt (2) is installed above the idler bracket (3).

2. The coal conveying belt deviation preventing device of a thermal power plant according to claim 1, characterized in that: The lower surface of the stop bar (5) is arc-shaped. The stop bar (5) is parallel to the boss (401) and the length of the stop bar (5) is greater than the width of the boss (401). The bottom of the stop bar (5) is close to the boss (401) but does not contact the boss (401).

3. The coal conveying belt deviation preventing device of a thermal power plant according to claim 1, characterized in that: The gap between the lower surface of the stop bar (5) and the top of the boss (401) is smaller than the thickness of the coal conveyor belt (2).

4. The coal conveying belt deviation preventing device of a thermal power plant according to claim 1, characterized in that: The idler support (3) is equipped with a cleaning assembly (6) for scraping off coal lumps adhering to the transmission part (402). The cleaning assembly (6) includes a scraper (601) that is adapted to the tilt angle of the transmission part (402) and can be elastically extended and retracted, and a support plate (602) that supports the scraper (601). The top of the scraper (601) abuts against the transmission part (402), and the bottom of the scraper (601) is slidably connected to the inside of the support plate (602). One end of the support plate (602) is fixedly installed on the outside of the idler support (3).

5. The coal conveying belt deviation preventing device of a thermal power plant according to claim 1, characterized in that: The top section of the scraper (601) is an arc-shaped sharp corner that is off-center from the center of the scraper (601) and has a sharp tip. The direction of the arc-shaped sharp corner at the top of the scraper (601) is opposite to the direction of rotation of the transmission part (402).

6. A coal conveying belt deviation preventing device for a coal-fired power plant according to claim 1, characterized in that: The inner side of the support plate (602) is equipped with several springs (603) that push the scraper (601) to slide upward and reset.

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