Coal conveying and dust retaining structure for thermal power plant

Abstract

The present application relates to coal transportation technical field, specifically for a coal conveying ash retaining structure for thermal power plant, including coal conveying seat, both sides of the top of coal conveying seat are fixedly installed with concave fixing block, the side surface of concave fixing block is detachably installed with right angle fixed plate through bolt, the upper surface of concave fixing block is fixedly installed with L-shaped baffle, the beneficial effects of the present application are that coal cleaning module is set through setting driving motor, gear and toothed plate cooperation, driving motor is started, and sliding frame and scraper can be driven to move along L-shaped baffle automatically, the continuous scraping and cleaning of the surface coal and slag of conveying belt are realized, the cleaning mechanism does not need to be pushed along the conveying line manually, the cleaning operation can be completed automatically under the condition of large coal conveying capacity and long conveying line, the frequency of manual participation is reduced, the timeliness of cleaning is ensured, and the problem that coal and slag are accumulated too much on the inside of ash retaining plate and the surface of conveying belt due to the untimely cleaning is avoided.

Description

Technical Field

[0001] This invention relates to the field of coal transportation technology, specifically to a coal conveying and ash-blocking structure for thermal power plants. Background Technology

[0002] In the process of coal transportation in thermal power plants, in order to prevent dust from spreading and coal slag from falling from both sides of the conveyor belt, it is often necessary to install ash-blocking structures on both sides of the conveyor belt.

[0003] For example, Chinese patent CN221853239U discloses a coal conveying ash-blocking structure for thermal power plants. It uses L-shaped baffles to block and limit the coal on both sides of the conveyor belt, and is equipped with a movable cleaning mechanism. This cleaning mechanism is magnetically connected to the driving mechanism by inserting a magnetic block. The operator can manually push the connecting block to drive the cleaning brush to clean the coal debris on the surface of the conveyor belt.

[0004] However, the movement of the cleaning mechanism relies entirely on manual pushing of the connecting blocks. In thermal power plants with large coal transport volumes and long conveyor lines, manual pushing along the line for cleaning is not only labor-intensive and demanding, but also makes it difficult to guarantee the frequency and timeliness of cleaning. If cleaning is not timely, coal fragments falling from the conveyor belt will continuously accumulate on the inside of the ash baffle and on the surface of the conveyor belt. Excessive accumulation may affect the limiting effect of the L-shaped baffle and even hinder the normal operation of the conveyor belt. Therefore, we propose an ash-blocking structure for coal conveying in thermal power plants. Summary of the Invention

[0005] The purpose of this invention is to provide a coal conveying and ash-blocking structure for thermal power plants to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a coal conveying and ash-blocking structure for a thermal power plant, comprising a coal conveying seat, wherein concave fixing blocks are fixedly installed on both sides of the top of the coal conveying seat, and right-angle fixing plates are detachably installed on the sides of the concave fixing blocks by bolts. An L-shaped baffle is fixedly installed on the upper surface of the concave fixing blocks, and a sliding baffle is movably connected to one side of the L-shaped baffle through a height adjustment module. An adjustable coal cleaning module is provided between the L-shaped baffle and the right-angle fixing plates. The coal cleaning module includes a sliding frame that slides along the L-shaped baffle, a support frame is fixedly installed on the upper surface of the sliding frame, a drive motor is fixedly installed on the upper surface of the support frame, a rotating rod is fixedly connected to the output end of the drive motor, and a gear is fixedly connected to the bottom end of the rotating rod. A guide connecting block is fixedly installed on the side surface of the right-angle fixing plate opposite to the concave fixing blocks. A toothed plate is fixedly installed on the inner wall of one side of the L-shaped baffle, and the toothed plate meshes with the gear. A scraper is movably connected to the top of the support frame through an adjustment module.

[0007] Preferably, the number of coal cleaning modules is set to two sets, and the two sets of coal cleaning modules are mirror images arranged on both sides of the scraper. The scraper is U-shaped, and diagonal reinforcing ribs are provided between the outer walls on both sides of the scraper and the bottom surface.

[0008] Preferably, the L-shaped baffle and the guide connecting block are provided with grooves whose width is adapted to the gear thickness, and the gear plate is provided in the groove on one side of the L-shaped baffle. At the same time, the side of the L-shaped baffle is also provided with a slide rail that slides with the sliding frame.

[0009] Preferably, the height adjustment module includes an adjustment cavity opened on the inner side of the L-shaped baffle, the inner wall of the adjustment cavity is slidably connected to the sliding baffle, a strong spring is fixedly installed on the inner wall of the end of the sliding baffle, a locking block is fixedly installed on the end of the strong spring, and several locking slots are linearly arrayed on the end of the L-shaped baffle along the sliding direction of the sliding baffle.

[0010] Preferably, the inner wall of the end of the sliding baffle is provided with a storage cavity for the retraction of the locking block, and the end of the strong spring is fixedly installed on the inner wall of the end of the storage cavity, and the locking block slides in cooperation with the inner wall of the storage cavity.

[0011] Preferably, the upper surface of the sliding baffle at the top of the card slot is lower than the height of the connection between the support frame and the scraper.

[0012] Preferably, the adjustment module includes a positioning plate fixedly installed on the top of the support frame near the coal conveying seat. The inner wall of the positioning plate has a positioning hole. The inner wall of the positioning plate is detachably connected to the top inner wall of the scraper through a positioning rod. A pull plate is fixedly installed at the end of the positioning rod. A strong tension spring is fixedly connected between the side wall of the pull plate and the top side wall of the scraper.

[0013] Preferably, the top of the scraper is rotatably connected to the axis of the positioning disk via a rotating shaft, and the positioning hole is located in the gap between the outer edge of the rotating shaft and the outer arc surface of the positioning disk, and the size of the positioning hole is adapted to the positioning rod.

[0014] Preferably, the number of positioning holes is provided in two sets, with the two sets of positioning holes respectively located directly above and below the rotating shaft.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: The coal conveying ash-blocking structure for thermal power plants is equipped with a coal cleaning module that uses a drive motor, gears, and toothed plates. After the drive motor is started, it can drive the sliding frame and scraper to move automatically along the L-shaped baffle, thereby realizing continuous scraping and cleaning of coal debris on the surface of the conveyor belt. There is no need for manual pushing of the cleaning mechanism along the conveyor line. When the coal conveying volume is large and the conveyor line is long, the cleaning operation can be completed automatically, reducing the frequency of manual intervention, ensuring the timeliness of cleaning, and avoiding the problem of excessive accumulation of coal debris on the inside of the ash-blocking plate and the surface of the conveyor belt due to untimely cleaning. It solves the problem that the movement of the cleaning mechanism in the existing ash-blocking structure depends entirely on manual pushing, and the cleaning is delayed and labor-intensive under the condition of long-distance and large-volume transportation.

[0016] Secondly, by setting up a height adjustment module consisting of a locking block, a strong spring, and multiple sets of slots, the operator only needs to press the locking block to disengage it from the current slot to move the sliding baffle up and down to the required height. After releasing it, the strong spring automatically pushes the locking block into the corresponding slot to complete the locking. The entire adjustment process requires no additional tools and is simple and quick to operate. During use, the ash-blocking height can be flexibly adjusted according to changes in the coal conveying volume, so that the sliding baffle is always kept in a suitable blocking position to prevent coal from falling from both sides of the conveyor belt or excessive dust diffusion. This solves the problem that the existing ash-blocking structure has a fixed height and is difficult to adapt to the ash-blocking requirements under different conveying volume conditions.

[0017] Furthermore, by setting up an adjustment module consisting of a positioning plate, a positioning rod, a pull plate, and a strong tension spring, the scraper can swing around the rotating shaft to adjust the angle with the conveyor belt surface after the pull plate is pulled outward to disengage the positioning rod from the positioning hole. After the pull plate is released, the positioning rod automatically inserts into the corresponding positioning hole to complete the angle locking. The two sets of positioning holes located directly above and below the rotating shaft correspond to the scraper's storage and cleaning states, respectively, which facilitates quick switching of the working angle according to cleaning needs. At the same time, when cleaning is not required, the scraper can be disengaged from the conveyor belt surface to reduce wear and running resistance. This solves the problems of inconvenient scraper angle adjustment and difficulty in flexibly switching between cleaning and non-cleaning states in existing cleaning devices. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a front view of the scraper of the present invention;

[0020] Figure 3 This is a schematic diagram of the end structure of the sliding baffle of the present invention;

[0021] Figure 4 This is a schematic diagram of the positioning rod, pull plate, positioning disc, and scraper structure of the present invention.

[0022] The components represented by each number in the attached diagram are listed below: 1. Coal conveyor seat; 2. Concave fixing block; 3. Right-angle fixing plate; 4. Bolt; 5. L-shaped baffle; 6. Slot; 7. Sliding baffle; 8. Locking block; 9. Strong spring; 10. Guide connecting block; 11. Sliding frame; 12. Drive motor; 13. Rotating rod; 14. Gear; 15. Tooth plate; 16. Support frame; 17. Positioning plate; 18. Scraper; 19. Pull plate; 20. Strong tension spring; 21. Positioning hole; 22. Positioning rod. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] This invention provides a technical solution: such as Figures 1-4 The diagram illustrates a coal conveying and ash-blocking structure for a thermal power plant, comprising a coal conveying seat 1. Concave fixing blocks 2 are fixedly installed on both sides of the top of the coal conveying seat 1. Right-angle fixing plates 3 are detachably installed on the sides of the concave fixing blocks 2 via bolts 4. An L-shaped baffle 5 is fixedly installed on the upper surface of the concave fixing blocks 2. A sliding baffle 7 is movably connected to one side of the L-shaped baffle 5 via a height adjustment module. An adjustable coal cleaning module is provided between the L-shaped baffle 5 and the right-angle fixing plate 3. The coal cleaning module includes a component that slides along the L-shaped baffle 5. The sliding frame 11 has a support frame 16 fixedly installed on its upper surface. A drive motor 12 is fixedly installed on the upper surface of the support frame 16. A rotating rod 13 is fixedly connected to the output end of the drive motor 12. A gear 14 is fixedly connected to the bottom end of the rotating rod 13. A guide connecting block 10 is fixedly installed on the side surface of the right-angle fixed plate 3 opposite to the concave fixed block 2. A toothed plate 15 is fixedly installed on the inner wall of one side of the L-shaped baffle 5. The toothed plate 15 meshes with the gear 14. A scraper 18 is movably connected to the top of the support frame 16 through an adjustment module.

[0025] The drive motor 12 drives the gear 14 to rotate through the rotating rod 13. The gear 14 meshes with the toothed plate 15 to generate a driving force along the extension direction of the toothed plate 15, so that the sliding frame 11 slides automatically on the L-shaped baffle 5. This allows the scraper 18 to move along the conveying direction to clean coal slag without manual pushing. At the same time, the sliding baffle 7 can be adjusted up and down according to the coal accumulation height to improve the ash blocking adaptability and adapt to the ash blocking requirements of different coal transportation volumes. The scraper 18 can change the cleaning angle under the action of the adjustment module to enhance the cleaning effect. It can also change its position when cleaning is not needed to avoid obstructing normal coal transportation operations.

[0026] The coal cleaning module is set in two sets, and the two sets of coal cleaning modules are mirrored on both sides of the scraper 18. The scraper 18 is set in a U-shape, and diagonal reinforcing ribs are provided between the outer walls on both sides of the scraper 18 and the bottom surface.

[0027] The two sets of mirrored coal cleaning modules can balance the force on both sides of the scraper 18, avoiding skew and jamming caused by unilateral drive. The U-shaped scraper 18 can cover the debris at the bottom and sides of the conveyor belt at the same time. The oblique reinforcing ribs improve the structural rigidity of the scraper 18, making it less prone to bending and deformation during long-term scraping and extending its service life.

[0028] The L-shaped baffle 5 and the guide connecting block 10 are both provided with grooves whose width is adapted to the thickness of the gear 14. The gear plate 15 is set in the groove on one side of the L-shaped baffle 5. At the same time, the side of the L-shaped baffle 5 is also provided with a slide rail that slides with the sliding frame 11.

[0029] The groove can limit and guide the meshing area of ​​gear 14 and toothed plate 15, preventing gear 14 from shifting laterally and dislodging during movement, ensuring relative stability during meshing transmission. The slide rail provides a stable linear motion track for the sliding frame 11, reducing sliding friction resistance, ensuring that the cleaning module moves smoothly back and forth on the long-distance conveyor line, and improving the reliability of the entire device operation.

[0030] Please see Figure 3 The height adjustment module includes an adjustment cavity opened on the inner side of the L-shaped baffle 5. The inner wall of the adjustment cavity is slidably connected to the sliding baffle 7. A strong spring 9 is fixedly installed on the inner wall of the end of the sliding baffle 7. A locking block 8 is fixedly installed on the end of the strong spring 9. Several locking slots 6 are linearly arrayed along the sliding direction of the sliding baffle 7 at the end of the L-shaped baffle 5.

[0031] Workers can press the locking block 8 to compress the powerful spring 9 to disengage it from the current slot 6, then grasp the sliding baffle 7 and move it to the target height. After releasing, the powerful spring 9 pushes the locking block 8 to automatically engage with the corresponding slot 6, achieving rapid positioning of the sliding baffle 7. The ash-blocking height can be flexibly adjusted according to the coal conveying volume without additional tools, making the operation simple.

[0032] The inner wall of the end of the sliding baffle 7 is provided with a storage cavity for the retraction of the locking block 8, and the end of the strong spring 9 is fixedly installed on the inner wall of the end of the storage cavity, and the locking block 8 slides in cooperation with the inner wall of the storage cavity.

[0033] The storage cavity provides retraction space for the locking block 8, preventing hard interference between the locking block 8 and the inner wall of the L-shaped baffle 5 when adjusting the sliding baffle 7. The sliding cooperation between the locking block 8 and the inner wall of the storage cavity ensures the consistency of the extension and retraction direction of the locking block 8, preventing the locking block 8 from tilting and getting stuck, and ensuring smooth and reliable height adjustment.

[0034] The upper surface of the sliding baffle 7 at the top of the slot 6 is lower than the height of the connection between the support frame 16 and the scraper 18.

[0035] The height restriction ensures that when the sliding baffle 7 is raised to the highest dust-blocking position, its upper surface will not collide with the connection between the support frame 16 or the scraper 18, thus avoiding mechanical interference. At the same time, it also ensures that the scraper 18 has sufficient movement space during reciprocating movement, preventing the sliding baffle 7 from being too high and obstructing the normal cleaning trajectory of the scraper 18.

[0036] Please see Figure 2 and Figure 4 The adjustment module includes a positioning plate 17 fixedly installed on the top of the support frame 16 near the coal conveying seat 1. The inner wall of the positioning plate 17 has a positioning hole 21. The inner wall of the positioning plate 17 is detachably connected to the top inner wall of the scraper 18 through a positioning rod 22. A pull plate 19 is fixedly installed at the end of the positioning rod 22. A strong tension spring 20 is fixedly connected between the side wall of the pull plate 19 and the top side wall of the scraper 18.

[0037] When the worker pulls the pull plate 19 outward, the positioning rod 22 can be disengaged from the positioning hole 21. At this time, the scraper 18 can rotate around the shaft to adjust the angle with the surface of the conveyor belt. After being released, the strong tension spring 20 automatically pulls the pull plate 19 back, so that the positioning rod 22 can be reinserted into the positioning hole 21 to complete the angle locking. This enables the scraper 18 to quickly adjust and reliably fix the cleaning angle, adapting to the cleaning needs of coal with different particle sizes.

[0038] The top of the scraper 18 is rotatably connected to the axis of the positioning disk 17 via a rotating shaft, and the positioning hole 21 is located in the gap between the outer edge of the rotating shaft and the outer arc surface of the positioning disk 17. The size of the positioning hole 21 is adapted to the positioning rod 22.

[0039] The rotating shaft enables the scraper 18 to rotate and connect with the positioning disk 17, allowing the scraper 18 to swing angularly around the axis. The positioning hole 21 is located between the outer edge of the rotating shaft and the outer arc surface of the positioning disk 17, ensuring that the locking torque generated by the positioning rod 22 on the scraper 18 after insertion is large and the angle is well maintained. At the same time, the mutual adaptation between the positioning hole 21 and the positioning rod 22 can avoid loosening gaps and improve positioning accuracy.

[0040] There are two sets of positioning holes 21, which are located directly above and below the rotating shaft, respectively.

[0041] The two sets of positioning holes 21 correspond to the two commonly used working angles of the scraper 18, which are tilted upwards and downwards. When tilted downwards, the scraper 18 is in the state of scraping and cleaning, while when tilted upwards, it is in the state of being detached from the coal conveyor belt, so as to avoid obstructing the normal transportation of coal. When the scraper 18 is rotated to the position directly above or directly below, the positioning rod 22 can be quickly inserted into the corresponding positioning hole 21 to achieve angle switching without repeated trial and adjustment, which simplifies the operation process and improves the convenience of scraper 18 angle adjustment and the consistency of repeated positioning.

[0042] Working principle: First, start the drive motor 12. The output end of the drive motor 12 drives the rotating rod 13 to rotate. The gear 14 at the bottom of the rotating rod 13 rotates accordingly. Since the gear 14 meshes with the toothed plate 15 fixedly installed on the inner wall of one side of the L-shaped baffle 5, the gear 14 will generate a linear driving force along the length of the toothed plate 15 during rotation, thereby driving the sliding frame 11 to slide smoothly along the slide rail on the side of the L-shaped baffle 5. When the sliding frame 11 moves, the adjustment module and scraper 18 move synchronously through the support frame 16 fixed above it, so that the scraper 18 continuously scrapes and cleans the coal slag on the surface of the conveyor belt. At the same time, the two sets of coal cleaning modules mirrored on both sides of the scraper 18 work simultaneously to ensure that the scraper 18 is subjected to balanced force on both sides. The U-shaped scraper 18 covers the bottom and side areas of the conveyor belt at the same time, and the oblique reinforcing ribs can enhance the structural strength of the scraper 18.

[0043] When the dust-blocking height needs to be adjusted, press the locking block 8 to compress the strong spring 9 and retract it into the storage cavity. The locking block 8 will disengage from the current slot 6. Then move the sliding baffle 7 up and down to the target position, release the locking block 8, and the strong spring 9 will push the locking block 8 to automatically engage with the corresponding slot 6, thus completing the height locking of the sliding baffle 7.

[0044] When the cleaning angle of the scraper 18 needs to be adjusted, pull the pull plate 19 outward. The pull plate 19 drives the positioning rod 22 to disengage from the positioning hole 21 on the positioning plate 17. At this time, the top of the scraper 18 rotates around the axis at the center of the positioning plate 17, adjusting the scraper 18 to the required angle. After releasing the pull plate 19, the strong tension spring 20 automatically pulls the pull plate 19 back, and the positioning rod 22 is reinserted into the corresponding positioning hole 21, completing the angle locking of the scraper 18. The two sets of positioning holes 21 located directly above and below the axis correspond to the upward tilted storage state and the downward tilted cleaning state of the scraper 18, respectively.

[0045] 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, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0046] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A coal conveying and ash-blocking structure for a thermal power plant, comprising a coal conveying seat (1), wherein concave fixing blocks (2) are fixedly installed on both sides of the top of the coal conveying seat (1), and right-angle fixing plates (3) are detachably installed on the sides of the concave fixing blocks (2) by bolts (4), and an L-shaped baffle (5) is fixedly installed on the upper surface of the concave fixing blocks (2), characterized in that: A sliding baffle (7) is movably connected to one side of the L-shaped baffle (5) via a height adjustment module. An adjustable coal cleaning module is provided between the L-shaped baffle (5) and the right-angle fixed plate (3). The coal cleaning module includes a sliding frame (11) that slides along the L-shaped baffle (5). A support frame (16) is fixedly installed on the upper surface of the sliding frame (11). A drive motor (12) is fixedly installed on the upper surface of the support frame (16). A rotating rod (13) is fixedly connected to the output end of the drive motor (12). A gear (14) is fixedly connected to the bottom end of the rotating rod (13). A guide connecting block (10) is fixedly installed on the side surface of the right-angle fixed plate (3) opposite to the concave fixed block (2). A toothed plate (15) is fixedly installed on the inner wall of one side of the L-shaped baffle (5). The toothed plate (15) meshes with the gear (14). A scraper (18) is movably connected to the top of the support frame (16) via an adjustment module.

2. The ash-blocking structure for coal conveying in a thermal power plant according to claim 1, characterized in that: The number of coal cleaning modules is set to two sets, and the two sets of coal cleaning modules are mirror images of each other on both sides of the scraper (18). The scraper (18) is set in a U shape, and oblique reinforcing ribs are provided between the outer walls on both sides of the scraper (18) and the bottom surface.

3. The ash-blocking structure for coal conveying in a thermal power plant according to claim 2, characterized in that: The L-shaped baffle (5) and the guide connecting block (10) are both provided with grooves whose width is adapted to the thickness of the gear (14), and the gear plate (15) is provided in the groove on one side of the L-shaped baffle (5). At the same time, the side of the L-shaped baffle (5) is also provided with a slide rail that slides with the sliding frame (11).

4. The coal conveying and ash-blocking structure for thermal power plants according to claim 3, characterized in that: The height adjustment module includes an adjustment cavity opened on the inner side of the L-shaped baffle (5). The inner wall of the adjustment cavity is slidably connected to the sliding baffle (7). A strong spring (9) is fixedly installed on the inner wall of the end of the sliding baffle (7). A locking block (8) is fixedly installed on the end of the strong spring (9). Several slots (6) are linearly arrayed along the sliding direction of the sliding baffle (7) at the end of the L-shaped baffle (5).

5. The ash-blocking structure for coal conveying in a thermal power plant according to claim 4, characterized in that: The sliding baffle (7) has a storage cavity on its inner wall for the retraction of the locking block (8), and the end of the strong spring (9) is fixedly installed on the inner wall of the storage cavity. The locking block (8) slides in cooperation with the inner wall of the storage cavity.

6. The ash-blocking structure for coal conveying in a thermal power plant according to claim 5, characterized in that: The upper surface of the sliding baffle (7) at the top of the slot (6) of the card block (8) is lower than the height of the connection between the support frame (16) and the scraper (18).

7. The ash-blocking structure for coal conveying in a thermal power plant according to claim 6, characterized in that: The adjustment module includes a positioning plate (17) fixedly installed on the top of the support frame (16) near the coal conveying seat (1). The inner wall of the positioning plate (17) is provided with a positioning hole (21). The inner wall of the positioning plate (17) is detachably connected to the top inner wall of the scraper (18) through a positioning rod (22). A pull plate (19) is fixedly installed at the end of the positioning rod (22). A strong tension spring (20) is fixedly connected between the side wall of the pull plate (19) and the top side wall of the scraper (18).

8. The ash-blocking structure for coal conveying in a thermal power plant according to claim 7, characterized in that: The top of the scraper (18) is rotatably connected to the center of the positioning disk (17) by a rotating shaft, and the positioning hole (21) is set in the gap between the outer edge of the rotating shaft and the outer arc surface of the positioning disk (17). The size of the positioning hole (21) is adapted to the positioning rod (22).

9. A coal conveying and ash-blocking structure for a thermal power plant according to claim 8, characterized in that: The number of positioning holes (21) is set in two sets, with the two sets of positioning holes (21) respectively located directly above and below the rotating shaft.

Images