Self-cleaning type scraper for dry coal slime

Abstract

The utility model discloses a kind of self-cleaning type scrapers for dry coal slime, belong to material conveying equipment technical field, including scraper body and self-cleaning unit, scraper body has groove and groove in-circulation chain plate assembly, chain plate assembly includes chain and the scraper plate of interval arrangement.Self-cleaning unit is rigid metal scraper, is arranged in pairs in the front of scraper running direction two sides, and is arranged obliquely to corresponding side groove side wall, scraper and chain running direction present 40 ° to 50 ° acute angle, welding or through fixed support rod and locking bolt is detachably fixed on chain adjacent chain ring connection place.The utility model utilizes rigid scraper in operation to force to scrape dry coal slime in the jointing of groove side wall and chain plate assembly gap inner plate, effectively prevent chain overload, tensioning and chain breakage accident caused by material accumulation, with the advantages of good cleaning effect, reliable operation, convenient maintenance.

Description

Technical Field

[0001] This utility model relates to the field of material conveying equipment technology, specifically to a self-cleaning scraper conveyor for dry coal slime. Background Technology

[0002] In the coal washing industry, the dry coal slime processed by ultra-high pressure filter presses exhibits fine particle size and strong adhesion. When transporting this material using conventional scraper conveyors, the fine dry coal slime easily adheres to and cakes in the gaps between the chain plate assembly and the sidewall of the trough. The continuous increase of caking material in the gaps leads to a sharp increase in operating resistance, causing chain overload tension, increased drive current, and even causing the scraper to rise and hit the cover plate, resulting in frequent shutdowns or chain breakage accidents, seriously affecting production efficiency.

[0003] Currently, to address the issue of material accumulation in the gap between the scraper conveyor chain assembly and the trough sidewall, manual cleaning after machine shutdown is typically employed. However, this method is inefficient and disrupts continuous production. Some scraper conveyors also employ self-cleaning solutions during operation. While these known self-cleaning solutions are effective for loose materials, they are ineffective at removing the already adhered and caked dry coal slime, which is highly adhesive and prone to caking. Utility Model Content

[0004] The purpose of this invention is to provide a self-cleaning scraper for dry coal slime, so as to solve the problems mentioned in the background art, such as the inability to effectively remove the already adhered and caking dry coal slime.

[0005] To achieve the above objectives, this utility model provides a self-cleaning scraper conveyor for dry coal slime, comprising a scraper conveyor body and a self-cleaning unit. The scraper conveyor body includes a trough and a chain plate assembly that circulates within the trough. The chain plate assembly includes a chain and multiple scrapers spaced apart on the chain. The self-cleaning unit includes scraper blades, which are fixedly mounted on the chain and positioned in front of the corresponding scraper blade along the chain's forward direction. The scraper blades are used to scrape off dry coal slime adhering to the gap between the trough sidewall and the chain plate assembly.

[0006] Furthermore, the scraper includes a first scraper and a second scraper. The first scraper is located on the left side of the chain's forward running direction, and the left edge of the first scraper is in contact with the side wall inside the trough. The angle between the portion of the first scraper near the side wall inside the trough and the chain's forward running direction is α, where α is an acute angle. The second scraper is located on the right side of the chain's forward running direction, and the right edge of the second scraper is in contact with the side wall inside the trough. The angle between the portion of the second scraper near the side wall inside the trough and the chain's forward running direction is β, where β is an acute angle.

[0007] Furthermore, α is 40° to 50°, and β is 40° to 50°.

[0008] Furthermore, the first scraper and the second scraper are arranged in pairs on both sides of the scraper, and the number of the first scraper and the second scraper is equal to the number of scrapers.

[0009] Furthermore, the scraper blade is detachably and fixedly connected to the chain via a connecting structure.

[0010] Furthermore, the connecting structure includes a fixed support rod and a locking bolt. One end of the fixed support rod is fixedly connected to the chain, and the scraper is detachably fixed to the other end of the fixed support rod by the locking bolt.

[0011] Furthermore, the scraper adopts a rectangular plate structure, and the scraper size is 60mm×150mm.

[0012] Furthermore, the scraper blade is made of wear-resistant iron plate.

[0013] Furthermore, the chain is formed by multiple iron links that are interlocked.

[0014] Furthermore, the scraper is positioned at the connection point of two adjacent links on the chain, and the scraper is located at the link preceding the corresponding scraper.

[0015] This utility model has the following advantages over the prior art:

[0016] 1. This utility model utilizes a rigid scraper to remove easily caking dry coal slime. The scraper is positioned in front of the scraper's running direction and fixed at a specific position on the chain link, ensuring that the scraper can preferentially cut into the gaps where the material is prone to caking, significantly improving the cleaning effect.

[0017] 2. This utility model, through the inclined arrangement and specific angle design of the first and second scrapers towards the side wall of the trough, ensures a clean coverage area while reducing operating resistance, thus avoiding chain overload, tension, and chain breakage accidents caused by material accumulation. Simultaneously, the rigid metal scrapers themselves possess excellent wear resistance, making the entire self-cleaning unit durable, reliable, and with a long service life, significantly extending the maintenance cycle.

[0018] 3. This utility model utilizes a welded or detachable connection method for the scraper blades, which not only meets the needs of different working conditions but also facilitates maintenance and replacement, greatly reducing maintenance difficulty and cost. Furthermore, the overall structure is simple and the modification cost is low, making it particularly suitable for upgrading existing scraper conveyors. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This utility model Figure 1 Enlarged view of point A in the middle;

[0021] Figure 3 This is a top view of the connection between the chain plate assembly and the scraper of this utility model;

[0022] Figure 4 This is a front view of the connection between the chain plate assembly and the scraper blade of this utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] 13—Chain; 14—Scraper; 15—Feed inlet; 16—Cover plate; 17—Discharge port; 18—Drive device; 19—Support frame; 2—Scraper blade; 21—First scraper; 22—Second scraper; 3—Connection structure; 31—Fixed support rod. Detailed Implementation

[0025] 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. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0026] Example 1

[0027] like Figures 1 to 4 As shown, an embodiment of this utility model provides a self-cleaning scraper conveyor for dry coal slime, including a scraper conveyor body 1 and a self-cleaning unit. The scraper conveyor body 1 includes a trough 11 and a chain plate assembly 12 that circulates within the trough 11. The chain plate assembly 12 includes a chain 13 and a plurality of scrapers 14 spaced apart on the chain 13. The self-cleaning unit includes scraper blades 2, which are fixedly mounted on the chain 13 and positioned in front of the corresponding scraper blade 14 along the forward direction of the chain. The scraper blades 2 are used to scrape off the dry coal slime adhering to the gap between the side wall of the trough 11 and the chain plate assembly 12. In this embodiment, by setting a rigid scraper blade 2 in front of the scraper blade 14 in the direction of travel, a work order of scraping before transport is established. Before the scraper blade 14 arrives, the rigid scraper blade 2 cuts into and cleans the gap between the chain plate assembly and the side wall of the trough, where dry coal slime is most likely to clump. By setting up a rigid scraper 2, the path to a series of failures, such as increased running resistance and chain overload, caused by the accumulation of dry coal slime in the gaps, is cut off at the source.

[0028] like Figure 3As shown, the scraper 2 includes a first scraper 21 and a second scraper 22. The first scraper 21 is located on the left side of the chain's forward running direction, and its left edge contacts the inner sidewall of the groove 11. The angle between the portion of the first scraper 21 near the inner sidewall of the groove 11 and the forward running direction of the chain 13 is α, where α is an acute angle. The second scraper 22 is located on the right side of the chain's forward running direction, and its right edge contacts the inner sidewall of the groove 11. The angle between the portion of the second scraper 22 near the inner sidewall of the groove 11 and the forward running direction of the chain 13 is β, where β is an acute angle. The first scraper 21 and the second scraper 22 are arranged in pairs on both sides of the scraper 14, and the number of the first scraper 21 and the second scraper 22 is equal to the number of scrapers 14. In this embodiment, preferably, both angles α and β are 45°. In this embodiment, the cleaning coverage and scraping power of the scraper blades 2 are optimized by their "outward V-shape" layout and specific geometric relationship with the running direction at a 45° acute angle. The "outward V-shape" arrangement allows a pair of scraper blades 2 to cover a wider area on both sides of the scraper plate 14, forming a cleaning surface on the side wall of the guide trough, effectively improving the cleaning capacity that may be insufficient in single-point cleaning. At the same time, the specific acute angle design allows the scraper blades to cut into the caking dry coal slime at a better angle, ensuring both the scraping particle size and guiding the dry coal slime laterally in the running direction, which helps to reduce running resistance and wear on the scraper blades 2, thereby expanding the cleaning range while improving operational efficiency and equipment durability.

[0029] like Figure 2 As shown, the scraper blade 2 is detachably fixed to the chain 13 via a connecting structure 3. The connecting structure 3 includes a fixed support rod 31 and a locking bolt. One end of the fixed support rod 31 is fixedly connected to the chain 13, and the scraper blade 2 is detachably fixed to the other end of the fixed support rod 31 via the locking bolt. This detachable connection via the fixed support rod 31 and the locking bolt allows the scraper blade 2 to be designed as an independent, quickly replaceable modular component. The fixed support rod 31, as a permanent base welded to the chain, provides a stable installation interface, while the locking bolt allows for repeated disassembly and reassembly of the connection point. This design improves the maintainability of the equipment. When the scraper blade wears or is damaged during operation, maintenance personnel do not need to perform cutting, grinding, or welding operations; they only need to loosen the bolts with tools to install the old scraper blade onto the new one. This significantly shortens maintenance time, reduces maintenance complexity and costs, and minimizes equipment downtime losses.

[0030] In this embodiment, the scraper blade can adopt a rectangular plate structure with dimensions of 60mm × 150mm. The scraper blade can be made of wear-resistant iron plate. In this embodiment, the scraper blade 2, made of a rectangular wear-resistant iron plate, directly withstands the high-intensity friction and impact during the scraping operation. The rectangular plate structure provides a stable and continuous scraping edge, ensuring the uniformity of the cleaning effect. Using wear-resistant iron plate material and limiting its dimensions ensures that the scraper blade 2 possesses sufficient mechanical strength, impact resistance, and wear life under harsh working conditions, enabling it to withstand continuous resistance against caking dry coal slime, avoiding premature damage, and thus ensuring the long-term effectiveness and reliability of the cleaning function.

[0031] like Figure 4 As shown, chain 13 is formed by multiple iron links interconnected in a crisscross pattern. Scraper blades 2 are positioned at the junction of two adjacent links on chain 13, and are located at the link preceding the corresponding scraper plate 14. Precise installation and positioning of the scraper blades 2 at the junction preceding the corresponding link on scraper plate 14 is crucial for achieving the intended cleaning function. This ensures that each pair of scraper blades 2 completes its scraping task before scraper plate 14 during operation, allowing the scraped dry coal sludge to be immediately transported by the subsequent scraper plate 14, preventing re-accumulation and caking. It also guarantees the consistency and reliability of the cleaning action.

[0032] In this embodiment, the scraper conveyor body 1 adopts an existing product. For example... Figure 1 As shown, the scraper conveyor body 1 also includes a feed inlet 15, a cover plate 16, a discharge outlet 17, a drive unit 18, and a support frame 19. The feed inlet 15 is located at one end of the trough 11, and the discharge outlet 17 is located at the other end of the trough 11. The chain 13 is powered by the drive unit 18, and the chain 13 circulates from the feed inlet 15 to the discharge outlet 17. The cover plate 16 is located above the groove of the trough 11 and is used to prevent leakage of dry coal slime during transportation. The support frame 19 is located below the trough 11 and is used to provide support for the entire structure.

[0033] In this embodiment, the chain plate assembly 12 includes a chain 13, which is an existing product. Each chain consists of multiple intersecting, perpendicularly connected links forming a chain loop structure. The links are made of iron, with a length of 160mm, a width of 60mm, and a quantity of 100 links. The scraper 14 is a square cavity structure made of impact-resistant and wear-resistant material. The scraper 14 is bolted together and evenly distributed on the chain 13, with one scraper fixed every 10 loops. The scraper 14 has a height of 75mm, a length of 1400mm, and a wall thickness of 10mm, ensuring that the chain 13 is suspended in the air throughout the entire operation.

[0034] In this embodiment, the working process of the self-cleaning scraper conveyor for dry coal slime is as follows:

[0035] When the scraper conveyor starts, the drive unit 18, carrying the chain plate assembly 12, circulates within the trough 11. Dry coal slurry enters from the feed inlet 15 and is propelled towards the discharge outlet 17 by the scraper 14. During this process, the scraper blade 2, positioned in front of the scraper 14, first contacts the gap between the side wall of the trough 11 and the chain plate assembly 12. Utilizing a rigid structure and a specific angle, it forcibly scrapes off the dry coal slurry adhering to this area. The scraped-off dry coal slurry is then transported normally by the subsequent scraper 14, thus achieving synchronous self-cleaning during operation.

[0036] Example 2

[0037] Based on Example 1, this example only changes the connection method of the scraper 2. The scraper 2 is fixedly connected to the chain 13 by welding through a fixed support rod 31. One end of the fixed support rod 31 is welded to the chain 13, and the scraper 2 is welded to the other end of the fixed support rod 31. This example achieves a permanent, high-rigidity, and robust connection between the scraper and the chain by using a fixed support rod and welding for the fixed connection. The fixed support rod also serves as a connecting component, but by using welding at both ends, the support rod and the chain, and the support rod and the scraper, are completely integrated. This structure constitutes an extremely stable and robust load-bearing body, which can effectively resist the severe impact and continuous alternating stress generated when scraping dry coal slime, fundamentally avoiding the risk of failure due to loose connection points or bolt fatigue. This provides connection reliability and structural strength for the self-cleaning function, ensuring long-term stable operation under harsh environmental conditions.

[0038] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by directional terms such as "upper," "lower," and "front" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model; the directional term "inner" refers to the inside or outside relative to the outline of each component itself.

[0039] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the present utility model. Any simple modifications, alterations, or equivalent structural transformations made to the above embodiments based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A self-cleaning scraper conveyor for dry coal slime, characterized in that, include: The scraper conveyor body (1) includes a trough (11) and a chain plate assembly (12) that circulates within the trough (11). The chain plate assembly (12) includes a chain (13) and a plurality of scrapers (14) spaced apart on the chain (13). The self-cleaning unit includes a scraper (2), which is fixedly mounted on the chain (13) and located on the front side of the scraper (14) in the forward direction of the chain. The scraper (2) is used to scrape off the dry coal sludge adhering to the gap between the side wall of the trough (11) and the chain plate assembly (12).

2. The self-cleaning scraper conveyor for dry coal slime according to claim 1, characterized in that: The scraper (2) includes a first scraper (21) and a second scraper (22). The first scraper (21) is located on the left side of the chain's forward running direction. The left edge of the first scraper (21) is in contact with the inner side wall of the groove (11). The angle between the portion of the first scraper (21) near the inner side wall of the groove (11) and the forward running direction of the chain (13) is α, where α is an acute angle. The second scraper (22) is located on the right side of the chain's forward running direction. The right edge of the second scraper (22) is in contact with the inner side wall of the groove (11). The angle between the portion of the second scraper (22) near the inner side wall of the groove (11) and the forward running direction of the chain (13) is β, where β is an acute angle.

3. The self-cleaning scraper conveyor for dry coal slime according to claim 2, characterized in that: The α is 40° to 50°, and the β is 40° to 50°.

4. A self-cleaning scraper conveyor for dry coal slime according to claim 2, characterized in that: The first scraper (21) and the second scraper (22) are arranged in pairs on both sides of the scraper (14), and the number of the first scraper (21) and the second scraper (22) is equal to the number of the scraper (14).

5. A self-cleaning scraper conveyor for dry coal slime according to claim 1, characterized in that: The scraper (2) is detachably fixed to the chain (13) via the connecting structure (3).

6. A self-cleaning scraper conveyor for dry coal slime according to claim 5, characterized in that: The connection structure (3) includes a fixed support rod (31) and a locking bolt. One end of the fixed support rod (31) is fixedly connected to the chain (13), and the scraper (2) is detachably fixed to the other end of the fixed support rod (31) by the locking bolt.

7. A self-cleaning scraper conveyor for dry coal slime according to claim 1, characterized in that: The scraper (2) adopts a rectangular plate structure, and the size of the scraper (2) is 60mm×150mm.

8. A self-cleaning scraper conveyor for dry coal slime according to claim 1 or 7, characterized in that: The scraper (2) is made of wear-resistant iron plate.

9. A self-cleaning scraper conveyor for dry coal slime according to claim 1, characterized in that: The chain (13) is formed by multiple iron links that are interconnected.

10. A self-cleaning scraper conveyor for dry coal slime according to claim 9, characterized in that: The scraper (2) is located at the connection point of two adjacent links on the chain (13), and the scraper (2) is located at the link preceding the scraper (14).

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