A self-weighted, unpowered, adjustable rotary blade belt cleaner

Abstract

The utility model discloses a kind of unpowered self-weighting adjustment rotary type scraper belt sweeper, belong to belt conveying equipment technical field.The sweeper mainly includes mounting bracket, counterweight installation shaft, scraper assembly, counterweight assembly and two unique compensation bracket, the eccentric arc design of the compensation bracket, one end is connected counterweight installation shaft, the other end is installed scraper assembly through adjusting hole;Counterweight assembly includes counterweight rod with pin hole and adjustable position counterweight block.The utility model utilizes belt operation automatic drive scraper rotation, without external power.It is in that the core is in the synergistic effect of eccentric compensation bracket and counterweight lever, the gravity of counterweight block is converted into the contact pressure of continuous, stable and soft to scraper, and can be self-adapting belt fluctuation, effectively solved the problem, such as poor cleaning effect, quick wear, inaccurate pressure regulation of traditional sweeper to viscous material, with the significant advantages of high cleaning efficiency, small wear, long life, long maintenance cycle.

Description

Technical Field

[0001] This utility model belongs to the technical field of belt conveyor equipment, specifically relating to a non-powered, self-weighting, adjustable rotary scraper belt cleaner. Background Technology

[0002] In belt conveyor systems, materials often adhere to the belt surface, especially in humid environments such as coal mines and power plants, where sticky materials like wet coal and slurry are difficult to clean. Traditional fixed scrapers suffer from rapid wear and inconvenient adjustment, requiring replacement on average every 2-3 weeks, and causing severe damage to the belt surface. While power-driven sweepers offer improved cleaning performance, they are energy-intensive, have a high failure rate, and significantly increase maintenance costs.

[0003] Existing non-powered sweepers, such as patent CN218706610U (non-powered self-adjusting belt conveyor roller sweeper), employ a brush roller structure and a simple lever principle, achieving self-adjustment through a counterweight. However, this sweeper is ineffective at cleaning viscous materials, the brush roller is prone to clogging, and its adjustment precision is limited, making it unable to adapt to complex working conditions. Test data shows that when the material moisture content is greater than 20%, its cleaning efficiency drops from the nominal 85% to 60-70%. Another patent, CN111674832A (non-powered wind-water linkage rotary belt sweeper), relies on the belt to drive a straight idler roller, which in turn drives the roller brush to rotate through a linkage mechanism. However, its structure is complex, maintenance is inconvenient, and it is prone to jumping when the belt tension changes. Utility Model Content

[0004] The purpose of this invention is to solve the above-mentioned technical problems and provide a non-powered, self-weighting, adjustable rotary scraper belt cleaner with high cleaning efficiency, strong adaptability, and long service life. It is specifically designed to address the cleaning difficulties of viscous materials.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A non-powered, self-balancing, adjustable rotary scraper belt cleaner includes two compensation brackets, a scraper assembly, a counterweight assembly, a mounting frame, and a counterweight mounting shaft. The mounting frame is fixed on the left and right sides of the frame beside the belt shaft. The lower end of the mounting frame has a vertical mounting plate. The counterweight mounting shaft is rotatably disposed between the left and right mounting plates. The two compensation brackets are plate-shaped ovoid structures, symmetrically disposed on the outer sides of the mounting plates. One end is connected to the counterweight mounting shaft by a key, and the other end is obliquely upward below the belt shaft and has an adjustment hole. The scraper assembly is mounted in the adjustment hole at both ends by bearings. The counterweight assembly is connected to the left and right sides of the counterweight mounting shaft disposed in the mounting plate by a key. The scraper assembly includes a rotating shaft and 8-10 scrapers. The two ends of the rotating shaft are connected to the adjustment holes through bearings. The scrapers are radially and evenly distributed on the rotating shaft, and the contact angle β between the arc-shaped tangent of the scraper tip and the belt is 15°-30°. The counterweight assembly includes a counterweight block and a counterweight rod. One end of the counterweight rod is connected to the counterweight mounting shaft by a key, and the counterweight block is movably sleeved on the other end of the counterweight rod.

[0006] Furthermore, the counterweight rod is evenly provided with several pin holes, and the counterweight block is fixed by inserting a pin shaft into the pin holes on both sides.

[0007] Furthermore, a first idler roller that contacts the top surface of the belt is provided between the mounting brackets, and a second idler roller that contacts the bottom surface of the belt is provided between the mounting plates.

[0008] Furthermore, the scraper is made of wear-resistant rubber or polyurethane with a Shore hardness of 65A-85A.

[0009] Furthermore, the monolithic structure of the compensation bracket is an eccentric design, with the geometric center line of its arc located above and behind the central axis A of the counterweight mounting shaft, with an offset distance d = 10-15 mm.

[0010] 1. This utility model adopts a non-powered design, relying on the belt movement to automatically drive the scraper to rotate, without the need for an external power source, which is energy-saving and environmentally friendly, and reduces operating costs; 2. This utility model achieves self-weight adjustment through the lever principle of the counterweight component and the compensation bracket. It can automatically adjust the contact pressure between the scraper and the belt according to the material adhering to the belt, resulting in a stable and reliable cleaning effect and strong adaptability. 3. This utility model adjusts the position of the counterweight by adjusting the pin hole on the counterweight rod, thereby adjusting the distance between the counterweight and the scraper assembly. It is easy to operate, can adjust the scraper pressure, and optimize the cleaning performance. 4. The structure of this utility model enables the sweeper to exhibit superior stability far exceeding the sum of the functions of individual components when facing complex working conditions such as uneven material adhesion, belt tension changes, or uneven rollers. It is simple and compact, with fewer components, and is easy to install and maintain, thus reducing manufacturing and maintenance costs. 5. The eccentric structure of the compensating bracket in this invention causes a slight backward buffering action when the scraper contacts the belt, thus avoiding a hard impact. This greatly reduces wear on the scraper itself and the belt surface, extending its service life. When the belt jumps, has uneven tension, or changes in material thickness during operation, this design can maintain the continuous and stable pressure of the scraper on the belt through slight adaptive oscillation, solving the pain points of large pressure fluctuations and unstable cleaning effects in traditional sweepers. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the installation structure of this utility model; Figure 2 for Figure 1 Front view structural diagram; Figure 3 This is a schematic diagram of the structure of this utility model; Figure 4 for Figure 3 A schematic diagram of the right-side view structure; Figure 5 This is a schematic diagram of the counterweight component of this utility model; Figure 6 This is a schematic diagram of the contact structure between the scraper and the belt in this utility model; In the diagram: 1-Belt shaft; 2-Belt; 3-Frame; 4-Compensation bracket; 5-Scraper assembly; 6-Counterweight block; 7-Mounting frame; 8-First idler roller; 9-Second idler roller; 10-Counterweight mounting shaft; 11-Adjusting hole; 12-Counterweight rod; 13-Pin hole; 14-Pin shaft; 15-Mounting plate. Detailed Implementation

[0012] The present invention will be further described below with reference to the embodiments and accompanying drawings. Example

[0013] A non-powered, self-weight-adjustable rotary scraper belt cleaner includes two compensation brackets 4, a scraper assembly 5, a counterweight assembly, a mounting frame 7, and a counterweight mounting shaft 10. The mounting frame 7 is fixed to the left and right side frames 3 beside the belt shaft 1. A vertical mounting plate 15 is provided at the lower end of the mounting frame 7. A first idler roller 8 is provided between the mounting frames 7 to contact the top surface of the belt 2, and a second idler roller 9 is provided between the mounting plates 15 to contact the bottom surface of the belt 2. The counterweight mounting shaft 10 is rotatably disposed between the left and right mounting plates 15. The compensation bracket 4 is a plate-shaped monolithic structure, symmetrically arranged on both sides of the outer side of the mounting plate 15. One end is connected to the counterweight mounting shaft 10 by a key, and the other end is obliquely upward located below the belt shaft 1 and is provided with an adjustment hole 11. The monolithic structure of the compensation bracket 4 is eccentrically designed, and the geometric center line of its arc is located above and behind the central axis A of the counterweight mounting shaft 10, with an offset distance d=12mm. The scraper assembly 5 is installed in the adjustment hole 11 at both ends by bearings. The counterweight assembly is connected to the left and right sides of the counterweight mounting shaft 10 in the mounting plate 15 by a key. The scraper assembly 5 includes a rotating shaft and eight scrapers made of wear-resistant rubber. The two ends of the rotating shaft are connected to the adjustment holes 11, and the eight scrapers are radially and evenly distributed on the rotating shaft. The counterweight assembly includes a counterweight block 6 and a counterweight rod 12. One end of the counterweight rod 12 is connected to the counterweight mounting shaft 10 by a key. The counterweight block 6 is movably sleeved on the other end of the counterweight rod 12. Several pin holes 13 are evenly opened on the counterweight rod 12. The counterweight block 6 is fixed by inserting a pin shaft 14 into the pin holes 13 on both sides.

[0014] The contact angle β between the arc-shaped tangent at the front end of the scraper and the belt 2 is 20°, and the Shore hardness of the scraper is 75A.

[0015] The contact angle β between the arc-shaped tangent at the front end of the scraper and the belt 2 can be any value between 15° and 30°, and the scraper can also be made of polyurethane with a hardness of 65A-85A.

[0016] The offset distance of the compensation bracket 4 can also be any value between 10-15mm. This design acts as a "force amplifier," efficiently and smoothly transferring the weight of the counterweight into the cleaning force of the scraper with minimal resistance. This means that ideal cleaning results can be achieved with a smaller counterweight, resulting in lower system operating resistance and greater energy savings. The eccentric design upgrades a simple gravity lever into an intelligent cleaning system with buffering and pressure adaptation, which is key to simultaneously achieving efficient cleaning, ultra-low wear, and excellent stability.

[0017] Regarding the contact angle β between the arc-shaped tangent at the front end of the scraper and belt 2, tests show that if a 90° vertical downward cut is used: the impact force is large, but it is difficult to slide, easy to get stuck, and wears out quickly; when scraping at a very small angle (such as 5°) flat: it is like "scratching" the belt, with low friction, but insufficient cleaning force, and cannot remove viscous materials. When scraping at an angle of 15°-30°: this is an ideal state that combines "scraping" and "cutting", which can effectively cut into the adhesive layer and use the movement of the belt to scrape the material away smoothly.

[0018] Application testing was conducted in a raw coal conveying system in an underground coal mine. Test conditions included: material moisture content of 18-22%, belt speed of 2.5 m / s, and an operating time of 30 days. A comparison with patent CN218706610U is as follows:

[0019] Test results show that this invention significantly improves cleaning efficiency, wear resistance, and stability. Example

[0020] Tests conducted in the power plant's coal conveying system showed that the cleaning efficiency for sticky, wet coal containing fly ash (moisture content 20-25%) reached 97.8%, with virtually no dust dispersion, demonstrating good environmental adaptability. In this embodiment, 10 scrapers were used, made of polyurethane (Shore hardness 80A), and the contact angle between the scrapers and the conveyor belt 2 was 25°.

[0021] After 100 hours of continuous operation, the scraper in this embodiment showed uniform wear with a maximum wear depth of 1.2mm, while the scraper of the traditional structure showed localized deep wear (maximum 3.5mm).

[0022] When using this invention, select a suitable counterweight 6 according to the amount and amount of material adhering to the belt 2, adjust the position of the counterweight 6 on the counterweight rod 12, insert the pin 14 into the pin holes 13 on both sides of the counterweight 6, and lock and fix the counterweight 6. At this time, the counterweight rod 12, the counterweight mounting shaft 10 and the compensation bracket 4 form a lever structure. Under the action of the counterweight 6, the scraper assembly 5 is in close contact with the bottom of the belt 2 at the belt shaft 1. When the belt conveyor is started, the belt shaft 1 drives the belt 2 to rotate, which in turn drives the first idler 8, the second idler 9 and the scraper to rotate. The material adhering to the belt 2 is scraped off by the rotating scraper. During the initial contact phase (buffering): When the counterweight 6 causes the scraper assembly 5 to swing toward the belt 2 through the lever principle, since the center is off-center, the rotational trajectory of the compensation bracket 4 will force the scraper to produce a slight backward "yield" or "retract" action in the final stage of approaching the belt 2. This avoids the scraper directly hitting the belt 2 in a "hard-on-hard" manner, but rather like a hand gently touching the surface of the belt 2 first. This buffer greatly reduces the initial impact force and protects the scraper and the belt 2.

[0023] Stable working phase (continuous pressure): After the scraper passes the initial contact point, the trajectory of the eccentric arc transforms the downward pull of the counterweight 6 into a more effective continuous and stable normal pressure on the surface of the belt 2. This pressure changes very smoothly throughout the entire working arc, ensuring that the scraper can maintain a constant cleaning force when disturbed by uneven belt 2 or changes in material thickness, without violently jumping or detaching.

[0024] By adjusting the position of the scraper assembly 5 within the adjustment hole 11, the contact position between the scraper and the belt 2 can be adjusted. By adjusting the position of the counterweight 6 on the counterweight rod 12, the contact pressure between the scraper and the belt 2 can be adjusted, thereby achieving different degrees of belt cleaning.

Claims

1. A non-powered, self-weighting, adjustable rotary scraper belt cleaner, characterized in that: The system includes two compensation brackets (4), a scraper assembly (5), a counterweight assembly, a mounting frame (7), and a counterweight mounting shaft (10). The mounting frame (7) is fixed on the left and right side frames (3) next to the belt shaft (1). The lower end of the mounting frame (7) is provided with a vertical mounting plate (15). The counterweight mounting shaft (10) is rotatably disposed between the left and right mounting plates (15). The two compensation brackets (4) are plate-shaped ovoid structures, symmetrically disposed on the two sides outside the mounting plate (15). One end is connected to the counterweight mounting shaft (10) by a key, and the other end is obliquely upward located below the belt shaft (1) and provided with an adjustment hole (11). The two ends of the scraper assembly (5) are installed in the adjustment hole (11) by bearings. The counterweight assembly is connected to the left and right sides of the counterweight mounting shaft (10) disposed in the mounting plate (15) by a key. The scraper assembly (5) includes a rotating shaft and 8-10 scrapers. The two ends of the rotating shaft are connected to the adjustment hole (11) through bearings. The scrapers are radially and evenly distributed on the rotating shaft, and the contact angle β between the arc-shaped tangent at the front end of the scraper and the belt (2) is 15°-30°. The counterweight assembly includes a counterweight block (6) and a counterweight rod (12). One end of the counterweight rod (12) is connected to the counterweight mounting shaft (10) by a key, and the counterweight block (6) is movably sleeved on the other end of the counterweight rod (12).

2. The non-powered, self-weighting, adjustable rotary scraper belt cleaner according to claim 1, characterized in that, The counterweight rod (12) has several pin holes (13) evenly distributed on it. The counterweight block (6) is fixed by inserting the pin holes (13) on both sides through the pin shaft (14).

3. The non-powered, self-weight-adjustable rotary scraper belt cleaner according to claim 1, characterized in that, The mounting brackets (7) are provided with a first idler roller (8) that contacts the top surface of the belt (1), and the mounting plates (15) are provided with a second idler roller (9) that contacts the bottom surface of the belt (1).

4. The non-powered, self-weight-adjustable rotary scraper belt cleaner according to claim 1, characterized in that, The scraper is made of wear-resistant rubber or polyurethane, with a Shore hardness of 65A-85A.

5. A non-powered, self-weighting, adjustable rotary scraper belt cleaner according to claim 1, characterized in that, The monolithic structure of the compensation bracket (4) is an eccentric design, with the geometric center line of its arc located above and behind the central axis (A) of the counterweight mounting shaft (10), with a deviation distance d=10-15mm.

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